I know this is an older video but my tbi 350 did the same thing but it also made the tac jump around. Only when cold never hot. But it turned out to be the pick up in the dizzy
I appreciate the reply! I changed that last year, as well as the ECM. I think the pickup is often to blame. I've pretty much shot the whole parts cannon at it now with no change. Apparently a sloppy timing chain can cause it, but I think I'll go LS before going any further now.
