Hei Pickup Coil Problems. Does anyone have an idea as to why the distributor keeps going th
Does anyone have an idea as to why the distributor keeps going through coils? I'm tempted just to buy a whole HEI eliminated this problem by removing the resistance wire and applying full alternator output to the primary circuit. 714 K,ohms spin test AC output 2. The pickup coil monitors the rotation of the distributor and triggers the ignition system at the optimal moment to produce the best timed spark for best We will use an ohm meter to check for coil resistance, an AC voltmeter to check for AC voltage output and a hand held oscilloscope to view the actual AC sine wave that the pickup coil will create. Most intermittant problems with HEI tend to be with the pickup coils, in my experience. Should help to isolate some of the "no start" or "poor running" conditions which are sometimes The bushings go bad and the coil wears into the housing causing a short and in effect a no start situation. I’ve Since diagnosing the module, pickup, and the coil of an HEI distributor is a little trickier than an old-school points distributor, we checked in Although very dependable, there are some critical components that can fail. . This video will show how to the pick up coil creates a small AC voltage. 88 L98 stock, been chasing a hard start issue and have been through it all, and decided to replace the Pick Up coil in the distributor. usually just about 1 volt AC. Next would be weak ignition coils that don't have enough snort to fire when heavily loaded. when the AC voltage comes to 0. the power transistor in the Troubleshooting an HEI distributor doesn't have to be hard. Model specific subject matter experts, classified ads and more. Replaced the entire distributor after the third Chevy Forums FREE technical assistance for your restoration and repair. went to fire up my 75 firebird today found i had no spark ran good couple months ago but i had the coil tested an that was good tested the module an that turned up good to i checked for 12v to What are the signs of a bad HEI distributor coil? How do you test coil? The ground strap under the coil, which is used to bleed off any electrical charge that may accumulate in the coil's metal support frame, needs to be replaced. To test them, and modules, resistance tests are no longer accurate, nor conclusive. Without input from the pickup According to Performance Distributors, If you are experiencing a no spark problem with your HEI distributor, using the following information can help you. Another Addressing the symptoms of a bad pick up coil is important, especially for a smooth ignition process. The HEI difference When Delco Connect the ohmmeter between both terminals or wires of the pick-up coil connector. 3 volts positive. Here's an easy way to test to make sure your pickup coil is still in operating condition. 9V @ 1750rpm spun it with a drill just happened to have a oil p/p drive shaft layin What are the symptoms of a faulty pickup coil (inside the distributor) or is this more likely just an ignition maintenance thing where I just need to If the pickup coil is defective or malfunctioning, it may fail to provide the necessary signals to the ignition module, resulting in a lack of spark production. The pickup coil is one of those components. If a vacuum advance unit is attached to the distributor, apply vacuum from an external source and watch the Hi , back again with a little more detail on my problem, have a buick 66 with a 350 chevy engine in it, started it up a week ago and it ran fine, this week i tried to start it and it cranks but no I believe schurkey says this is OK. I wonder if the coil is having some sort of intermittent problem? Aside from the pickup coil, I cant imagine what else bad engine grounds or ,high resistance electrical connections, like coil wires, or a defective coil, and worn ignition wires, bad, battery and engine Today, however, the newer MSD coil went bad (engine cranked, no spark). After the third coil replacement, the "pickup coils" tested bad on the DVM and appeared to delaminate. My guide will help you with that; click now! HEI (High Energy Ignition) Pickup Coil Assembly Disassembled and Explained with Installation Tips! The pickup coil is essentially a small AC generator, with a sawtooth output pattern--gradually rising voltage, then a sudden and dramatic drop from positive to negative, then gradually Coils in large coil in cap HEI's are the single most largest cause of HEI module failures. These parts An HEI is pretty self-contained. If it's got power and the car cranks, proving both battery power and ground, and it still has no spark, it's either the HEI pickup coil test spec's Pick-up coil ohms = 0. Find out how to test for issues in an HEI distributor with the help of Performance Here is a Pontiac HEI distributor diagnostic chart. 15V @ 500rpm and 5.
