Checking your distributor rotor and cap to see if they need to be replaced is one way to ensure that everything is in solid working order. Refer to “Specifications. I show you the difference between a good distributor and a bad one. Five Starter Warning Signs: When the starter drive gear is worn out or not engaging properly, they will often produce a grinding noise that is similar to the one that is heard if you start your engine and then accidentally hit the starter again. Wide open throttle yields no power. Check the timing. This can range Difficulty in Starting. This is a common problem spot. Article Summary X. This is your total advance. The next step is to test the spark plug wire that attaches to the middle tower of the distributor cap for spark. But changing times demand changing designs. Some Common Bad Distributor Symptoms. Bad Distributor Cap Symptoms As above, a worn, corroded or wet distributor cap is a bad distributor cap, and these incidents are common. 7 Vortec I can't imagine a distributor going bad. First check for power to the coil. This moment in time is measured in crankshaft degrees before the piston reaches top dead center (TDC). Its two main roles are to create a spark strong enough to ignite the air/fuel mixture for combustion and to control the timing of the spark plugs by opening and closing the ignition coil ground circuit. High-Pitched Squealing. Charlie Knudsen 67 Camaro RS/SS 350 TKO 600, 4. Problems with the Distributor. If there are no spots, test your spark plug wires with a spark plug tester to make sure they’re sparking properly. check engine light is on: the ecm monitors all parts of the vehicle that could affect emissions. Check the timing. Engine misfires. Engine misfires can occur for a number of reasons. It only performs one function; that is to connect the coil to the appropriate plug at the appropriate time. If a distributor fails or the gear inside of it goes bad, the rotating arm will not deliver current to the right coil at the right time. 3 Liter V8 Vortec 5300 engines were defective. I have since changed out the alternator with a new one. The original small-block Chevy (SBC) V8 was built for decades, spanning from the mid-1950s through the 1990s. This information can be adapted to other engine families but details may differ. C3 Tech/Performance - Coil failure symptoms? - I had an unpleasant experience last week with my 70 big block. If you have 12v there, then manually open the points and check for spark from the coil. I show you the difference between a good distributor and a bad one. The carb has just been restored. Reply With. To check this remove the distributor cap & move the rotor button side to side to see if there is any play. Easier yet, the common problem is the distributor pickup, located under the distributor cap. When they start to go bad, stumbling under load occurs. All the old wiring was stripped out and a new 12 volt harness installed. My wife's uncle has a nice stock 81 Chevy or GMC pickup that has some sort of EFI badge on the tailgate, so there is some sort of fuel injection on it, but I don't know if. Ignition is the point at which combustion actually occurs in an engine. engine is misfiring or running rough: an engine misfire results from. Whether it does or doesn't doesn't matter, the info in this test article still applies. If no spark, remove the wire from the points and manually "spark" it to ground. Short of a dyno the best way to find what total advance you need is some track tuning. Car doesn’t start. 2,990 Posts. Engine Misfire. The engine may bog down until you reach a lower RPM and then suddenly power returns. This is caused by an issue colloquially called “clutch slippage. Usually a faulty distributor rotor and cap will produce a few symptoms that alert the driver that service may be required. Engine misfires. A bad distributor will normally present a variety of symptoms, which can oftentimes be recognizable as distributor related. These little pitas can cause all kinds of hell. All the old wiring was stripped out and a new 12 volt harness installed. Yep, that's right your mini-van or pick up or SUV will crank up and start. Sometimes, it can send false signals that cause the computer to retard your timing. On all models except 350 Mag MPI: Manually adjust the engine throttle to 1800 RPM. check engine light is on: the ecm monitors all parts of the vehicle that could affect emissions. 7L 2-valve pushrod V8 small-block which produced from 260-300hp and 325-335lb-ft. Ignition Coil Circuit Descriptions. Do you think your car might have a bad ignition coil? If you're experiencing one or more of the following symptoms, you may be right. Discussion Starter · #1 · Jul 14, 2010. This is caused by an issue colloquially called “clutch slippage. What Are the Symptoms of a Bad Distributor in a Car? Unexplainable Shaking. This problem outlined is for C/Ks with the Chevy 350 or 5. Bad Distributor Cap Symptoms As above, a worn, corroded or wet distributor cap is a bad distributor cap, and these incidents are common. This can range Difficulty in Starting. Engine misfires. signs of a bad vacuum advance just want to know how to spot a bad vacuum advance, any help would be great. 3 Liter V8 Vortec 5300 engines were defective. Symptoms and Causes of a Bad Clutch Symptom: Engine’s Moving Quickly, Car’s Moving Slowly. 5 volts while cranking, you probably have a bad battery. If no spark, then the problem is coil or the wire to the points. When the light shuts off you can try to start the engine again. Check the Contact Points. Truck Starts, Idles, Then Dies. In the case of a fuel pump, a compromised diaphragm will drip raw fuel on the ground through a weep hole to notify the driver that there's a problem. Mine had an Edelbrock intake and carb on it, with a 700R4 behind it, and had no computer control at all. Insulator may be white. Do you think your car might have a bad ignition coil? If you're experiencing one or more of the following symptoms, you may be right. Sign up for FREE! Become a GM-Trucks. The 350 was a new crate motor that was set up with a Rochester 4 bbl and a stock HEI distributor. Symptoms may include: • the engine. Who else has had one go bad. Aim timing light at timing tab, located on the timing gear cover and crankshaft torsional damper. The result is misfires and the engine timing getting all out of whack. Charlie Knudsen 67 Camaro RS/SS 350 TKO 600, 4. Do you think your car might have a bad ignition coil? If you're experiencing one or more of the following symptoms, you may be right. To diagnose a loss of spark in your car engine, check your fuse box for any black spots on the fuses. When checking for 12 volts, do so while you are cranking the engine. A bad distributor can wreak havoc on your engine. The firing order on a traditional Chevy is: 1-8-4-3-6-5-7-2. Total advance is the most critical setting. Reply With. Sensor Problem. You can submit your own complaint to the NHTSA by clicking here or call the Hotline, Monday-Friday 8am to 8pm at (888) 327-4236, TTY: (800) 424-9153. On all models except 350 Mag MPI: Manually adjust the engine throttle to 1800 RPM. Finally found EXACTLY what my symptoms are. Unless it is cracked, has water inside, or bad contacts… there isn't much to fail on a cap. Symptoms Of A Bad Cam Sensor. Wide open throttle yields no power. If you just replaced your distributor and you’re still getting the P1345. In the case of a fuel pump, a compromised diaphragm will drip raw fuel on the ground through a weep hole to notify the driver that there's a problem. Look for any cracks or carbon trace in the cap. This information can be adapted to other engine families but details may differ. I show you the difference between a good distributor and a bad one. Classic Chevrolet / GMC Pickup Trucks. Finally found EXACTLY what my symptoms are. An old or failing ignition pickup may cut out signal intermittently, which may cause the engine to stall. Difficulty Starting. high (1500RPM) for a bit then comes down and may idle fine for ever. 10's, AFR 195 Street Heads, Comp 270H, Rhoads Lifters, Crane Ignition, Pertronix Dizzy, Performer RPM Q-Jet, Heavily Modified Q-Jet, Hooker Comp Headers, MagnaFlow 2 1/2", 144 Decibles(Alpine CDA-7998 Head Unit, RF X7 and RF 750X Amps, MB Quart Mid's & High's, Kicker L7 12" Solo Barics). Symptoms and Causes of a Bad Clutch Symptom: Engine’s Moving Quickly, Car’s Moving Slowly. Check the Contact Points. When they start to go bad, stumbling under load occurs. From buying. com Member Today! In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. A classic telltale sign that your distributor is going bad is unexplained shaking whenever the car is running. One of the most common 2007-2013 GMC and Chevy truck problems owners experience is excessive oil consumption. Five Starter Warning Signs: When the starter drive gear is worn out or not engaging properly, they will often produce a grinding noise that is similar to the one that is heard if you start your engine and then accidentally hit the starter again. I show you the difference between a good distributor and a bad one. Pull the hi-tension lead out of the distributor cap and hold near ground. Symptoms of Distributor Problems. Bad distributor symptoms chevy 350. Car Year, Make, Model: 1973 Chevy Nova Posts 71. First check for power to the coil. Check the dist reluctor and the top portion of the reluctor for rust at the dist shaft area. Engine Misfire. A bad distributor can wreak havoc on your engine. Usually a faulty distributor rotor and cap will produce a few symptoms that alert the driver that service may be required. Engine misfires. The result is misfires and the engine timing getting all out of whack. To check this remove the distributor cap & move the rotor button side to side to see if there is any play. Checking your distributor rotor and cap to see if they need to be replaced is one way to ensure that everything is in solid working order. This is caused by an issue colloquially called “clutch slippage. Lack of power. If nothing else seems to be wrong with your vehicle, be sure to check the. You can submit your own complaint to the NHTSA by clicking here or call the Hotline, Monday-Friday 8am to 8pm at (888) 327-4236, TTY: (800) 424-9153. First check for power to the coil. Car doesn’t start. To diagnose a loss of spark in your car engine, check your fuse box for any black spots on the fuses. The high energy ignition (HEI) ignition system has been a vast improvement over the old standard cap, rotor and point ignition system used in the past. If there are no spots, test your spark plug wires with a spark plug tester to make sure they’re sparking properly. engine is misfiring or running rough: an engine misfire results from. Also, check to see that the little carbon. 7L 2-valve pushrod V8 small-block which produced from 260-300hp and 325-335lb-ft. trucks is located near the firewall. Five Starter Warning Signs: When the starter drive gear is worn out or not engaging properly, they will often produce a grinding noise that is similar to the one that is heard if you start your engine and then accidentally hit the starter again. This information can be adapted to other engine families but details may differ. In order to fix your car's problem, you must first know how to troubleshoot in order to determine what exactly the problem is. Rough idle. Ignition timing is typically split into three types. Do you think your car might have a bad ignition coil? If you're experiencing one or more of the following symptoms, you may be right. Hadn't had the car on the road for several months. Car ran fine for the first 20 minutes or so. Unless it is cracked, has water inside, or bad contacts… there isn't much to fail on a cap. If you have 12v there, then manually open the points and check for spark from the coil. Its two main roles are to create a spark strong enough to ignite the air/fuel mixture for combustion and to control the timing of the spark plugs by opening and closing the ignition coil ground circuit. Sometimes, it can send false signals that cause the computer to retard your timing. Symptoms may include: • the engine. From buying. If you notice one, the fuse might have blown. Sometimes it is no big thing, sometimes pressure/volume problems arise. Checking your distributor rotor and cap to see if they need to be replaced is one way to ensure that everything is in solid working order. Bad gas mileage. If this happens, and it happened to me a lot, I always first checked the BAT. In the case of a fuel pump, a compromised diaphragm will drip raw fuel on the ground through a weep hole to notify the driver that there's a problem. All versions used a cast iron block although the Y and F bodies used aluminum heads instead of cast iron in the. Apparently the pickup coil starts shutting the module down once it gets hot if its bad/old. The reading at idle is your initial advance. Engine misfires can occur for a number of reasons. Ignition timing is typically split into three types. This problem led vehicle buyers to launch a class-action lawsuit against GM, which alleged 2010-2013 vehicles with Generation IV 5. The result is a misfire in the spark plugs. Symptoms may include: • the engine. Inspect the condenser; the engine will not function if it is broken. When the camshaft position sensor goes bad, it will NOT keep your 4. Truck Starts, Idles, Then Dies. Symptoms may include: • the engine may be harder to start • the engine may stumble / stumble, and/or hesitate • other symptoms may also be present Causes A code P0300 may mean that one or more of the following has happened: • Faulty spark plugs or wires • Faulty coil (pack) • Faulty oxygen sensor(s) • Faulty fuel injector (s). If a distributor fails or the gear inside of it goes bad, the rotating arm will not deliver current to the right coil at the right time. An old or failing ignition pickup may cut out signal intermittently, which may cause the engine to stall. The original small-block Chevy (SBC) V8 was built for decades, spanning from the mid-1950s through the 1990s. If you just replaced your distributor and you’re still getting the P1345. Engine misfires can occur for a number of reasons. The second way to test the vacuum advance does not require a pickup timing light. Starting Problems: Cars that have a bad distributor cap can face many problems running and starting, especially in the cold weather and low temperatures. The complaints found here are submitted by actual consumers with first hand experience. Timing the ignition, then, is a matter of getting the timing correct at one end (idle or full advance) and letting the rest of the range look after itself. In the case of a fuel pump, a compromised diaphragm will drip raw fuel on the ground through a weep hole to notify the driver that there's a problem. Here are a couple of symptoms that your vehicle is probably experiencing:. Engine Misfire. There are many symptoms points for a bad distributor cap. This is your total advance. Charlie Knudsen 67 Camaro RS/SS 350 TKO 600, 4. Then the wire from either the breaker points or the ignition module goes to coil (-). Now, of course, it's not gonna' run right. The other thing we saw was the mainshaft would wear in the distributor, this would cause the engine to idle rough or stall at idle or when letting off the fuel. If the grinding symptom is ignored, it may also result in damage to the engine flywheel. Wide open throttle yields no power. Unless it is cracked, has water inside, or bad contacts… there isn't much to fail on a cap. Engine misfires. Usually a problematic ignition pickup will produce a few symptoms that can alert the driver of a potential issue that should be serviced. How to Fix Passlock for Chevy Vehicles ∞. It could short out the coil voltage and cause a faulty connection inside the terminal of the distributor cap. If there are no spots, test your spark plug wires with a spark plug tester to make sure they’re sparking properly. Symptoms may include: • the engine. Engine Misfire. Symptoms of Distributor Problems. Checking your distributor rotor and cap to see if they need to be replaced is one way to ensure that everything is in solid working order. If spark, then problem is bad points or condensor. Insulator may be white. Discussion Starter · #1 · Jul 14, 2010. Many modern gasoline engines do not employ a traditional distributor but, instead, have either a coil on each spark plug or a coil pack that fires two cylinders. Symptoms may include: • the engine may be harder to start • the engine may stumble / stumble, and/or hesitate • other symptoms may also be present Causes A code P0300 may mean that one or more of the following has happened: • Faulty spark plugs or wires • Faulty coil (pack) • Faulty oxygen sensor(s) • Faulty fuel injector (s). Bad gas mileage. Easier yet, the common problem is the distributor pickup, located under the distributor cap. Usually the issue is the magnet cracks on the shaft, this creates magnetic poles that are not supposed to be there and it can cause drivability. high (1500RPM) for a bit then comes down and may idle fine for ever. Moreover, the ignition module could be bad as well. Usually a problematic ignition pickup will produce a few symptoms that can alert the driver of a potential issue that should be serviced. This is caused by an issue colloquially called “clutch slippage. Checking a coil with an ohmmeter will rarely give you an indication as to whether or not it is really bad unless the car is already just not running. This article is written with traditional Chevrolet V-8 engines in mind. If a distributor fails or the gear inside of it goes bad, the rotating arm will not deliver current to the right coil at the right time. Here are some basic symptoms, some duplicate. When the camshaft position sensor goes bad, it will NOT keep your 4. check engine light is on: the ecm monitors all parts of the vehicle that could affect emissions. this includes the ignition system. Usually a faulty distributor rotor and cap will produce a few symptoms that alert the driver that service may be required. When checking for 12 volts, do so while you are cranking the engine. The check engine light is on. Check the distributor cap inside for signs of cracks or carbon arc tracks. With ignition On, turn the engine pulley CW past the TDC mark. The following are usually the most common symptoms of a bad spark plug wires, or a bad distributor cap and rotor on this type of GM distributor mounted ignition control module: The car (or truck, or mini-van, or van) starts and runs, but with a misfire. check engine light is on: the ecm monitors all parts of the vehicle that could affect emissions. Loosen the distributor clamp bolt enough to just be able to rotate the distributor with some resistance. this includes the ignition system. The high energy ignition (HEI) ignition system has been a vast improvement over the old standard cap, rotor and point ignition system used in the past. There are many symptoms points for a bad distributor cap. You should get some kind of spark, although if you turn slowly the spark may be weak. I have since changed out the alternator with a new one. The distributor on 88-02 GMC and Chevrolet C1500, K1500, C2500, etc. Checking your distributor rotor and cap to see if they need to be replaced is one way to ensure that everything is in solid working order. Check the timing. Here are some basic symptoms, some duplicate. A bad distributor can wreak havoc on your engine. com Member Today! In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. Bad Distributor Cap Symptoms As above, a worn, corroded or wet distributor cap is a bad distributor cap, and these incidents are common. Sensor Problem. signs of a bad vacuum advance just want to know how to spot a bad vacuum advance, any help would be great. Usually a problematic ignition pickup will produce a few symptoms that can alert the driver of a potential issue that should be serviced. I show you the difference between a good distributor and a bad one. Do you think your car might have a bad ignition coil? If you're experiencing one or more of the following symptoms, you may be right. Checking your distributor rotor and cap to see if they need to be replaced is one way to ensure that everything is in solid working order. A more permanent solution is to either replace the ignition lock. ” Slippage occurs when a clutch’s ability to generate friction has been compromised either through wear and tear or occasionally through an oil or transmission leak. The other thing we saw was the mainshaft would wear in the distributor, this would cause the engine to idle rough or stall at idle or when letting off the fuel. Check the knock sensor of the Chevy 350 TBI. The original small-block Chevy (SBC) V8 was built for decades, spanning from the mid-1950s through the 1990s. If you notice one, the fuse might have blown. Wide open throttle yields no power. One of the first symptoms of a bad ignition pickup is an engine that stalls. In response to scott88. The engine is has four different versions, based on the cars it was in, including the Y-body, F-body, B-body, and D-body. Signs of a Bad Ignition Coil. Article Summary X. a faulty ignition control module can cause a number of problems. Make sure your 12-volt wire is connected to the spade connector labeled BAT. 10's, AFR 195 Street Heads, Comp 270H, Rhoads Lifters, Crane Ignition, Pertronix Dizzy, Performer RPM Q-Jet, Heavily Modified Q-Jet, Hooker Comp Headers, MagnaFlow 2 1/2", 144 Decibles(Alpine CDA-7998 Head Unit, RF X7 and RF 750X Amps, MB Quart Mid's & High's, Kicker L7 12" Solo Barics). Engine misfires can occur for a number of reasons. High-Pitched Squealing. This is a common problem spot. Inspect the condenser; the engine will not function if it is broken. Sometimes it is no big thing, sometimes pressure/volume problems arise. Engine misfires can occur for a number of reasons. Reply With. This information can be adapted to other engine families but details may differ. ” Slippage occurs when a clutch’s ability to generate friction has been compromised either through wear and tear or occasionally through an oil or transmission leak. The original small-block Chevy (SBC) V8 was built for decades, spanning from the mid-1950s through the 1990s. Checking a coil with an ohmmeter will rarely give you an indication as to whether or not it is really bad unless the car is already just not running. cap for a good connection. The following ignition system circuit diagram may be of help: Ignition System Circuit Diagram (1996-1999 Chevy/GMC Pick Up And SUV). The distributor on 88-02 GMC and Chevrolet C1500, K1500, C2500, etc. In the case of a fuel pump, a compromised diaphragm will drip raw fuel on the ground through a weep hole to notify the driver that there's a problem. I have since changed out the alternator with a new one. Difficulty Starting. From buying. My wife's uncle has a nice stock 81 Chevy or GMC pickup that has some sort of EFI badge on the tailgate, so there is some sort of fuel injection on it, but I don't know if. It only performs one function; that is to connect the coil to the appropriate plug at the appropriate time. Loosen the distributor clamp bolt enough to just be able to rotate the distributor with some resistance. If there are no spots, test your spark plug wires with a spark plug tester to make sure they’re sparking properly. 3 Liter V8 Vortec 5300 engines were defective. An old or failing ignition pickup may cut out signal intermittently, which may cause the engine to stall. If your distributor is suffering some problems, here are the most common bad distributor signs: Squealing Noises: One of the very first signs that you will notice if your car has a bad distributor cap is a yelling or squealing noise. The check engine light is on. Sign up for FREE! Become a GM-Trucks. Ignition timing is typically split into three types. In order to fix your car's problem, you must first know how to troubleshoot in order to determine what exactly the problem is. Once in a. The proper connection for a coil is that the voltage from the ignition switch goes to coil (+). Here are some basic symptoms, some duplicate. One of the most common 2007-2013 GMC and Chevy truck problems owners experience is excessive oil consumption. 7L 2-valve pushrod V8 small-block which produced from 260-300hp and 325-335lb-ft. Symptoms of Distributor Problems. The first is ignition timing that is, the amount of spark lead that is set using a timing light (aimed at the harmonic balancer with the engine at idle). The complaints found here are submitted by actual consumers with first hand experience. Sensor Problem. Moreover, the ignition module could be bad as well. 7 Vortec I can't imagine a distributor going bad. The other thing we saw was the mainshaft would wear in the distributor, this would cause the engine to idle rough or stall at idle or when letting off the fuel. When the light shuts off you can try to start the engine again. A temporary fix is to leave your key in the ignition, at the “auxiliary” position for about 10-15 minutes until the security light shuts off. Sometimes, it can send false signals that cause the computer to retard your timing. The distributor cap and coil have been replaced. A more permanent solution is to either replace the ignition lock. Timing the ignition, then, is a matter of getting the timing correct at one end (idle or full advance) and letting the rest of the range look after itself. The ignition module of your vehicle is the heart of your entire ignition system. 2000 & 2001 Chevy Prism 1999 K1500 Suburban 5. This is caused by an issue colloquially called “clutch slippage. Car doesn’t start. The second type is mechanical advance, determined by the distributor's mechanical advance system. The following ignition system circuit diagram may be of help: Ignition System Circuit Diagram (1996-1999 Chevy/GMC Pick Up And SUV). The original small-block Chevy (SBC) V8 was built for decades, spanning from the mid-1950s through the 1990s. Starting Problems: Cars that have a bad distributor cap can face many problems running and starting, especially in the cold weather and low temperatures. I had replaced the coil, the old one was ohm'ing high and my backfire came back. Just gonna replace the whole distributor. Moreover, the ignition module could be bad as well. If the battery voltage drops below 10. Here are some basic symptoms, some duplicate. Symptoms of Lean and Rich. Rinse, repeat, and cry. Check the distributor cap inside for signs of cracks or carbon arc tracks. This moment in time is measured in crankshaft degrees before the piston reaches top dead center (TDC). To ensure our content is always up-to-date with current information, best practices, and professional advice, articles are routinely reviewed by industry experts with years of hands-on experience. The engine may bog down until you reach a lower RPM and then suddenly power returns. This problem outlined is for C/Ks with the Chevy 350 or 5. Of course you can use a distributor from 74-79 cars and trucks if you can find a good used one. Increasing efficiency, horsepower, and emissions reduction was the name of the game in the late 1980s and early 1990s, and the camshaft-driven HEI distributor on the SBC was no longer effective. Here are some basic symptoms, some duplicate. Symptoms and Causes of a Bad Clutch Symptom: Engine’s Moving Quickly, Car’s Moving Slowly. Whether you're dealing with a manually operated fuel pump or a vacuum modulator mounted on an automatic transmission, it's a simple fact that a diaphragm will not last forever. Car ran fine for the first 20 minutes or so. The following are usually the most common symptoms of a bad spark plug wires, or a bad distributor cap and rotor on this type of GM distributor mounted ignition control module: The car (or truck, or mini-van, or van) starts and runs, but with a misfire. The second way to test the vacuum advance does not require a pickup timing light. You should get some kind of spark, although if you turn slowly the spark may be weak. There are many symptoms points for a bad distributor cap. Sensor Problem. Unless it is cracked, has water inside, or bad contacts… there isn't much to fail on a cap. Usually a problematic ignition pickup will produce a few symptoms that can alert the driver of a potential issue that should be serviced. One of the first symptoms of a bad ignition pickup is an engine that stalls. One of the most common 2007-2013 GMC and Chevy truck problems owners experience is excessive oil consumption. An old or failing ignition pickup may cut out signal intermittently, which may cause the engine to stall. Here are a couple of symptoms that your vehicle is probably experiencing:. Re: 88 350 TBI timing/ignition problem. this includes the ignition system. Make sure your 12-volt wire is connected to the spade connector labeled BAT. Sometimes, it can send false signals that cause the computer to retard your timing. If spark, then problem is bad points or condensor. The following are usually the most common symptoms of a bad spark plug wires, or a bad distributor cap and rotor on this type of GM distributor mounted ignition control module: The car (or truck, or mini-van, or van) starts and runs, but with a misfire. I had a replacement 87-95 truck 350 crate long block in my Chevelle. This is your total advance. The other thing we saw was the mainshaft would wear in the distributor, this would cause the engine to idle rough or stall at idle or when letting off the fuel. If you notice one, the fuse might have blown. Aim timing light at timing tab, located on the timing gear cover and crankshaft torsional damper. Look for any cracks or carbon trace in the cap. This can range Difficulty in Starting. All versions used a cast iron block although the Y and F bodies used aluminum heads instead of cast iron in the. My wife's uncle has a nice stock 81 Chevy or GMC pickup that has some sort of EFI badge on the tailgate, so there is some sort of fuel injection on it, but I don't know if. If this happens, and it happened to me a lot, I always first checked the BAT. A temporary fix is to leave your key in the ignition, at the “auxiliary” position for about 10-15 minutes until the security light shuts off. a faulty ignition control module can cause a number of problems. Check the distributor system and the rotors too. Since ignition coils play a role in igniting the engine's air-fuel mixture, a faulty coil can easily cause a misfire. Now, of course, it's not gonna' run right. One of the most common 2007-2013 GMC and Chevy truck problems owners experience is excessive oil consumption. Aim timing light at timing tab, located on the timing gear cover and crankshaft torsional damper. Engine Misfire. Many modern gasoline engines do not employ a traditional distributor but, instead, have either a coil on each spark plug or a coil pack that fires two cylinders. The second way to test the vacuum advance does not require a pickup timing light. Short of a dyno the best way to find what total advance you need is some track tuning. Problem I am having is anything under 2000 rpms it will run just horrible like its not firing on all cylinders and driving it does not change the symptoms. This moment in time is measured in crankshaft degrees before the piston reaches top dead center (TDC). Since ignition coils play a role in igniting the engine's air-fuel mixture, a faulty coil can easily cause a misfire. 3 Liter V8 Vortec 5300 engines were defective. 1988-1999 Chevrolet & GMC C/K GMT400 Platform. 10's, AFR 195 Street Heads, Comp 270H, Rhoads Lifters, Crane Ignition, Pertronix Dizzy, Performer RPM Q-Jet, Heavily Modified Q-Jet, Hooker Comp Headers, MagnaFlow 2 1/2", 144 Decibles(Alpine CDA-7998 Head Unit, RF X7 and RF 750X Amps, MB Quart Mid's & High's, Kicker L7 12" Solo Barics). With the engine off, remove the distributor cap and use a vacuum hand pump to operate the advance mechanism. The LT1 350 is a 5. The HEI design incorporates the vacuum advance mechanism, the ignition coil and a permanent magnet assembly that has a pole lined with teeth and a pick-up coil. Difficulty Starting. I have since changed out the alternator with a new one. This is my small block chevy 350 with hei distributor. Classic Chevrolet / GMC Pickup Trucks. wire running into the dist. cap for a good connection. Car doesn’t start. 3 Liter V8 Vortec 5300 engines were defective. Mine had an Edelbrock intake and carb on it, with a 700R4 behind it, and had no computer control at all. Inspect the condenser; the engine will not function if it is broken. Moreover, the ignition module could be bad as well. Some Common Bad Distributor Symptoms. Symptoms of Distributor Problems. high (1500RPM) for a bit then comes down and may idle fine for ever. Since ignition coils play a role in igniting the engine's air-fuel mixture, a faulty coil can easily cause a misfire. Truck Starts, Idles, Then Dies. The other thing we saw was the mainshaft would wear in the distributor, this would cause the engine to idle rough or stall at idle or when letting off the fuel. Then the wire from either the breaker points or the ignition module goes to coil (-). Ignition is the point at which combustion actually occurs in an engine. Rinse, repeat, and cry. This moment in time is measured in crankshaft degrees before the piston reaches top dead center (TDC). The result is a misfire in the spark plugs. I have since changed out the alternator with a new one. The other thing we saw was the mainshaft would wear in the distributor, this would cause the engine to idle rough or stall at idle or when letting off the fuel. An old or failing ignition pickup may cut out signal intermittently, which may cause the engine to stall. Bad gas mileage. One of the first symptoms of a bad ignition pickup is an engine that stalls. high (1500RPM) for a bit then comes down and may idle fine for ever. Ignition is the point at which combustion actually occurs in an engine. Pull the hi-tension lead out of the distributor cap and hold near ground. Engine Misfire. Bad distributor symptoms chevy 350. You need to become familiar with the following symptoms of a bad distributor to repair the damage in time, or else your engine will suffer: Starting and accelerating problems. The following are usually the most common symptoms of a bad spark plug wires, or a bad distributor cap and rotor on this type of GM distributor mounted ignition control module: The car (or truck, or mini-van, or van) starts and runs, but with a misfire. Usually the issue is the magnet cracks on the shaft, this creates magnetic poles that are not supposed to be there and it can cause drivability. Reduced Power - Sluggish at certain RPM's. The second way to test the vacuum advance does not require a pickup timing light. Check the distributor cap inside for signs of cracks or carbon arc tracks. Since it is a crucial part of the vehicle’s mechanism, the car will not run smoothly with a bad distributor cap. a faulty ignition control module can cause a number of problems. How to Fix Passlock for Chevy Vehicles ∞. if it determines the ignition module has caused a problem with the system, it will turn on the check engine light. Sometimes, it can send false signals that cause the computer to retard your timing. A temporary fix is to leave your key in the ignition, at the “auxiliary” position for about 10-15 minutes until the security light shuts off. If no spark, remove the wire from the points and manually "spark" it to ground. I had a replacement 87-95 truck 350 crate long block in my Chevelle. Do you think your car might have a bad ignition coil? If you're experiencing one or more of the following symptoms, you may be right. This is a common problem spot. To ensure our content is always up-to-date with current information, best practices, and professional advice, articles are routinely reviewed by industry experts with years of hands-on experience. Difficulty Starting. To check this remove the distributor cap & move the rotor button side to side to see if there is any play. Symptoms may include: • the engine may be harder to start • the engine may stumble / stumble, and/or hesitate • other symptoms may also be present Causes A code P0300 may mean that one or more of the following has happened: • Faulty spark plugs or wires • Faulty coil (pack) • Faulty oxygen sensor(s) • Faulty fuel injector (s). I show you the difference between a good distributor and a bad one. Finally found EXACTLY what my symptoms are. Whether you're dealing with a manually operated fuel pump or a vacuum modulator mounted on an automatic transmission, it's a simple fact that a diaphragm will not last forever. Check the distributor cap inside for signs of cracks or carbon arc tracks. This problem outlined is for C/Ks with the Chevy 350 or 5. Checking a coil with an ohmmeter will rarely give you an indication as to whether or not it is really bad unless the car is already just not running. Distributor rebuilt with new bushings and shaft, new points and plugs. The check engine light is on. All the old wiring was stripped out and a new 12 volt harness installed. The engine. Moreover, the ignition module could be bad as well. Sometimes it is no big thing, sometimes pressure/volume problems arise. If you just replaced your distributor and you’re still getting the P1345. 1988-1999 Chevrolet & GMC C/K GMT400 Platform. Its two main roles are to create a spark strong enough to ignite the air/fuel mixture for combustion and to control the timing of the spark plugs by opening and closing the ignition coil ground circuit. The complaints found here are submitted by actual consumers with first hand experience. You can submit your own complaint to the NHTSA by clicking here or call the Hotline, Monday-Friday 8am to 8pm at (888) 327-4236, TTY: (800) 424-9153. The HEI design incorporates the vacuum advance mechanism, the ignition coil and a permanent magnet assembly that has a pole lined with teeth and a pick-up coil. Symptoms of Distributor Problems. Usually a faulty distributor rotor and cap will produce a few symptoms that alert the driver that service may be required. Problems with the Distributor. 12-02-04 09:46 AM - Post# 566007. check the coil resistance values when warm. The original small-block Chevy (SBC) V8 was built for decades, spanning from the mid-1950s through the 1990s. Make sure your 12-volt wire is connected to the spade connector labeled BAT. Classic Chevrolet / GMC Pickup Trucks. The result is misfires and the engine timing getting all out of whack. Symptoms and Causes of a Bad Clutch Symptom: Engine’s Moving Quickly, Car’s Moving Slowly. The diaphragm moves a rod that turns a sliding plate at the base of the distributor, which can be seen with the naked eye. How to Fix Passlock for Chevy Vehicles ∞. Rough running engine. One of the first symptoms of a bad ignition pickup is an engine that stalls. Easy to replace, any junkyard with chevy/gmc trucks has a dozen of them. ” Slippage occurs when a clutch’s ability to generate friction has been compromised either through wear and tear or occasionally through an oil or transmission leak. Car doesn’t start. Discussion Starter · #1 · Jul 14, 2010. Usually a problematic ignition pickup will produce a few symptoms that can alert the driver of a potential issue that should be serviced. Testing the pickup. I show you the difference between a good distributor and a bad one. Sign up for FREE! Become a GM-Trucks. Excessive Oil Consumption. To diagnose a loss of spark in your car engine, check your fuse box for any black spots on the fuses. Usually a faulty distributor rotor and cap will produce a few symptoms that alert the driver that service may be required. In response to scott88. Inspect the condenser; the engine will not function if it is broken. I had replaced the coil, the old one was ohm'ing high and my backfire came back. There should be very little or no play in the shaft. Spark plugs are clean - No residue. The high energy ignition (HEI) ignition system has been a vast improvement over the old standard cap, rotor and point ignition system used in the past. The engine. Engine Misfire. Bad gas mileage. If this happens, and it happened to me a lot, I always first checked the BAT. Wide open throttle yields no power. Symptoms may include: • the engine may be harder to start • the engine may stumble / stumble, and/or hesitate • other symptoms may also be present Causes A code P0300 may mean that one or more of the following has happened: • Faulty spark plugs or wires • Faulty coil (pack) • Faulty oxygen sensor(s) • Faulty fuel injector (s). check engine light is on: the ecm monitors all parts of the vehicle that could affect emissions. The ignition module has a direct impact on the performance of the engine. The distributor on 88-02 GMC and Chevrolet C1500, K1500, C2500, etc. a faulty ignition control module can cause a number of problems. Whether it does or doesn't doesn't matter, the info in this test article still applies. Increasing efficiency, horsepower, and emissions reduction was the name of the game in the late 1980s and early 1990s, and the camshaft-driven HEI distributor on the SBC was no longer effective. Bad Distributor Cap Symptoms As above, a worn, corroded or wet distributor cap is a bad distributor cap, and these incidents are common. If the ignition wires are faulty, inspect and replace them. 12-02-04 09:46 AM - Post# 566007. To check this remove the distributor cap & move the rotor button side to side to see if there is any play. A bad distributor will normally present a variety of symptoms, which can oftentimes be recognizable as distributor related. These little pitas can cause all kinds of hell. If the grinding symptom is ignored, it may also result in damage to the engine flywheel. A more permanent solution is to either replace the ignition lock. Low temperatures. The complaints found here are submitted by actual consumers with first hand experience. With ignition On, turn the engine pulley CW past the TDC mark. check the distributor pickup for shorting/intermittents. If your distributor is suffering some problems, here are the most common bad distributor signs: Squealing Noises: One of the very first signs that you will notice if your car has a bad distributor cap is a yelling or squealing noise. The result is a misfire in the spark plugs. In order to fix your car's problem, you must first know how to troubleshoot in order to determine what exactly the problem is. Problems with the Distributor. I already replaced the coil about a month or so ago. Whether it does or doesn't doesn't matter, the info in this test article still applies. Engine misfires can occur for a number of reasons. high (1500RPM) for a bit then comes down and may idle fine for ever. Here are some basic symptoms, some duplicate. A temporary fix is to leave your key in the ignition, at the “auxiliary” position for about 10-15 minutes until the security light shuts off. wire running into the dist. check engine light is on: the ecm monitors all parts of the vehicle that could affect emissions. Symptoms of Lean and Rich. These little pitas can cause all kinds of hell. The second type is mechanical advance, determined by the distributor's mechanical advance system. Some Common Bad Distributor Symptoms. Look for any cracks or carbon trace in the cap. Symptoms of Distributor Problems. Aim timing light at timing tab, located on the timing gear cover and crankshaft torsional damper. Low temperatures. If you just replaced your distributor and you’re still getting the P1345. Checking your distributor rotor and cap to see if they need to be replaced is one way to ensure that everything is in solid working order. Rev the motor up until the distributor stops advancing and note what speed it maxes out. When they start to go bad, stumbling under load occurs. The distributor cap and coil have been replaced. I show you the difference between a good distributor and a bad one. There should be very little or no play in the shaft. This is my small block chevy 350 with hei distributor. Wide open throttle yields no power. The ignition module has a direct impact on the performance of the engine. First check for power to the coil. The distributor on 88-02 GMC and Chevrolet C1500, K1500, C2500, etc. ” Slippage occurs when a clutch’s ability to generate friction has been compromised either through wear and tear or occasionally through an oil or transmission leak. Problems with the Distributor. Many modern gasoline engines do not employ a traditional distributor but, instead, have either a coil on each spark plug or a coil pack that fires two cylinders. Engine stalling. Reply With. This problem outlined is for C/Ks with the Chevy 350 or 5. engine is misfiring or running rough: an engine misfire results from. A failed pickup will cause the engine not to run. Insulator may be white. If the grinding symptom is ignored, it may also result in damage to the engine flywheel. The ignition module has a direct impact on the performance of the engine. 1988-1999 Chevrolet & GMC C/K GMT400 Platform. If a distributor fails or the gear inside of it goes bad, the rotating arm will not deliver current to the right coil at the right time. ” Slippage occurs when a clutch’s ability to generate friction has been compromised either through wear and tear or occasionally through an oil or transmission leak. Mine had an Edelbrock intake and carb on it, with a 700R4 behind it, and had no computer control at all. The high energy ignition (HEI) ignition system has been a vast improvement over the old standard cap, rotor and point ignition system used in the past. Yep, that's right your mini-van or pick up or SUV will crank up and start. Difficulty Starting. Problem I am having is anything under 2000 rpms it will run just horrible like its not firing on all cylinders and driving it does not change the symptoms. Then the wire from either the breaker points or the ignition module goes to coil (-). Truck Starts, Idles, Then Dies. The first is ignition timing that is, the amount of spark lead that is set using a timing light (aimed at the harmonic balancer with the engine at idle). In response to scott88. 3 Liter V8 Vortec 5300 engines were defective. Re: 88 350 TBI timing/ignition problem. Low temperatures. The oil pressure sender can also operate the pump after it "sees. The second type is mechanical advance, determined by the distributor's mechanical advance system. Engine Misfire. A bad distributor can wreak havoc on your engine. Insulator may be white. First, the tell-tale signs of a bad ignition system, whether it's points, HEI, or these new coil-packs; is engine cranking, but not turning over. I have since changed out the alternator with a new one. This information can be adapted to other engine families but details may differ. Ignition Coil Circuit Descriptions. Engine misfires can occur for a number of reasons. In response to scott88. Problem I am having is anything under 2000 rpms it will run just horrible like its not firing on all cylinders and driving it does not change the symptoms. Starting Problems: Cars that have a bad distributor cap can face many problems running and starting, especially in the cold weather and low temperatures. You need to become familiar with the following symptoms of a bad distributor to repair the damage in time, or else your engine will suffer: Starting and accelerating problems. Symptoms of a Bad Distributor Cap Written by Gabriella Buonassisi on Jun 03, 2010. If spark, then problem is bad points or condensor. My wife's uncle has a nice stock 81 Chevy or GMC pickup that has some sort of EFI badge on the tailgate, so there is some sort of fuel injection on it, but I don't know if. Checking your distributor rotor and cap to see if they need to be replaced is one way to ensure that everything is in solid working order. This is a common problem spot. All versions used a cast iron block although the Y and F bodies used aluminum heads instead of cast iron in the. Whether you're dealing with a manually operated fuel pump or a vacuum modulator mounted on an automatic transmission, it's a simple fact that a diaphragm will not last forever. Rev the motor up until the distributor stops advancing and note what speed it maxes out. Five Starter Warning Signs: When the starter drive gear is worn out or not engaging properly, they will often produce a grinding noise that is similar to the one that is heard if you start your engine and then accidentally hit the starter again. The second type is mechanical advance, determined by the distributor's mechanical advance system. Pull the hi-tension lead out of the distributor cap and hold near ground. When it comes to aging cars, rubber components are often the first to deteriorate. check the distributor pickup for shorting/intermittents. It only performs one function; that is to connect the coil to the appropriate plug at the appropriate time. It could short out the coil voltage and cause a faulty connection inside the terminal of the distributor cap. To ensure our content is always up-to-date with current information, best practices, and professional advice, articles are routinely reviewed by industry experts with years of hands-on experience. The next step is to test the spark plug wire that attaches to the middle tower of the distributor cap for spark. Check the knock sensor of the Chevy 350 TBI. this includes the ignition system. The result is a misfire in the spark plugs. My friend helped greatly by collecting parts for this build, however the distributor was not built like the original and it does not perform like the origina. Charlie Knudsen 67 Camaro RS/SS 350 TKO 600, 4. I show you the difference between a good distributor and a bad one. This is your total advance.