Originally Posted by
billygraves
What I have seen is a loose ground on a cyl head cause this. Another is the By-Pass female terminal (under the glove box with the small connector) is enlarged (Loose fit). Oversized ECM terminals for the EST/By-Pass. I have seen a highly corroded distributor base set this and run very poor. Another is internally corroded dist cap, module connectors and green corroded pick-up coil terminals with early distributors.
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