Duration from a cylinder miss to total cutout lasting up to five seconds. It's time to test, diagnose, and discuss the symptoms of my HEI distributor. It seemed like the How do you test a vacuum advance on a HEI distributor? A vacuum advance is installed on the HEI distributor to increase engine response at low The GM HEI Ignition has been in use since 1974 and it’s simple to use design make it easy to put into just about anything. I've replaced the whole distributor but have the same problem. Will not cut out while stopped and idling. any help would be greatly appreciated. Find out how to test for issues in an HEI distributor with the help of When I used my old HEI it too would pull timing as I revved it up, but what I found was the distributor drive gear was the problem. Checked wiring. HEI stand for High Energy Ignition, which basically increases fuel burn, by pumping over 50,000 volts to each spark plug. Locked out timing is not for everyone. Idle vac went from 10" in park to almost 15" with 26 odd Chevy 350 using an Mallory small cap HEI marine distributor (yle624A), MSD 4pin coil. It should be around 32 degrees plus or minus one degree. C3 General - Stereo problem driving me insane - I have a '72 and installed an HEI distributor. Includes tips on testing, vacuum advance, and DUI Raise the rpm to 2,500 and recheck the timing. The pickup units also go bad with age but I know many folks believe the HEI modules are subject to sudden failure, but that is not my experience. The previous owner upgraded the ignition Intermittent engine cutting out while driving. I have an original stock ‘75 Yesterday my engine started cutting out really bad at engine speeds above 4500 rpm, particularly noticeable at WOT no matter what engine speed. For ra To install the HEI distributor, you will have to remove your original distributor. The Mallory distributors use their own pickup, and do not use the GM style pickup (see I have a 71 firebird with a hei distributor but the module keeps burning. Since then, my stereo has started cutting out. Before removing your original distributor, ensure you check the base hi, while fiddling with the stock HEI distributor i wound in a heap of initial advance just to see what would happen. The previous owner upgraded the ignition Hello guys I ran into a problem that just started last Monday and I know its not carb related cause it does not matter what one I had on its all the same symptoms. Hello folks. How the HEI Electronic Ignition Distributor Works HOWSTUFFINMYCARWORKS 166K subscribers Subscribe. If the timing does not rise, the centrifugal advance mechanism isn't working. It's a one wire ignition system that has been used in a huge number of GM Need help with a issue I'm having on my sbc with hei distributor and holley 600 vaccum secondary carb w/ electric choke recently when driving it started sputtering misfiring and I show how one can easily lock out an HEI distributor for those who don't already know, in real time, no edits. If it doesn't have a solid connection, the whole unit wont work properly. If it rises If you buy a new HEI distributor take the module off and check for the thermo grease not dielectric. Sometimes it works fine, then it I will leave out you'r stock GM HEI for now because they will rpm fine for your setup and i have never had one only misfire under a load because they don't to seem to act up I ended up cutting the mechanical advance down to half of it's original travel and making a hard stop for it to top out against instead of it gradually trying to advance more and Hei distributors also seam to wear the bushings out faster than the old style points so make sure there isn't much wobble in the shaft. This is my small The General Motors HEI distributor first showed up in production vehicles in 1975. Also the new distributors have I think this problem out ranks the faulty ignition module units found in distributors of all brands. I need some help/advice about the GM HEI ignition distributors I purchased a 63 Buick Electra about 18 months ago. Learn how HEI distributors work, how to wire and install them, and why they’re a top upgrade over points ignition systems. I lock out an HEI distributor (big cam cars do not seem to work well with HEI advance mechanisms) to test a cut out issue on our blow through turbo carburetor SBC in our 1980 Trans Am Troubleshooting an HEI distributor doesn't have to be hard. Model specific subject matter experts, classified ads and more. These distributors are fairly simp Chevy Forums FREE technical assistance for your restoration and repair. Changed out my gear and only had 1°retard Engine expert Jeff Smith helps a reader solve some nagging ignition timing issues, with a specific focus on the distributor.
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