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tim_mc · 01-03-2022, 08:34 PM

Maybe disconnect your tach lead from the HEI to make sure it's not grounding out somewhere.

Last June my new GM HEI started giving me problems after only a year or so of use. I first tried a new coil and module from my local Advance Auto Parts, but the new module was suspect after the truck died a couple of times unexpectedly but would fire up after sitting for a minute or two. A Davis Unified Ignition (DUI) coil and module fixed me up.

01-03-2022, 08:34 PM	#5
tim_mc Registered User Join Date: Jan 2019 Location: St Peters, MO Posts: 454	Re: Time for a new HEI? Maybe disconnect your tach lead from the HEI to make sure it's not grounding out somewhere. Last June my new GM HEI started giving me problems after only a year or so of use. I first tried a new coil and module from my local Advance Auto Parts, but the new module was suspect after the truck died a couple of times unexpectedly but would fire up after sitting for a minute or two. A Davis Unified Ignition (DUI) coil and module fixed me up. __________________ 1967 C20, 350 SBC w/Comp roller cam, 700R4 w/3.42 posi, PS, 4-wheel PDB, Old Air AC & GM Tilt column. Last edited by tim_mc; 01-03-2022 at 08:49 PM.