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andyh1956 · 01-07-2018, 12:16 AM

sounds like you started with the new weights & springs so now you didn't get a baseline & your engine don't like that much advance. Try this- put some stiffer springs or heavier weights in the mechanical advance 1st, then if it still pops you may have to mechanically limit the vacuum advance either by adjustment or stopping or limit the module plate from moving.
It COULD be a bad distributor so throw a stock HEI in there & see how it runs. Heck go drive it without the vacuum hooked up before you deal with the weights & springs & see how it does just so you know.

01-07-2018, 12:16 AM	#2
andyh1956 Registered User Join Date: Mar 2010 Location: thomastown mississippi Posts: 1,261	Re: 82 Chevy SWB 355 timing issues!!! sounds like you started with the new weights & springs so now you didn't get a baseline & your engine don't like that much advance. Try this- put some stiffer springs or heavier weights in the mechanical advance 1st, then if it still pops you may have to mechanically limit the vacuum advance either by adjustment or stopping or limit the module plate from moving. It COULD be a bad distributor so throw a stock HEI in there & see how it runs. Heck go drive it without the vacuum hooked up before you deal with the weights & springs & see how it does just so you know.