I Had this same issue last year and again this year. Last year i started with fuel filter, fuel pumps, fuel regulator, and what the heck even all new intake gaskets. Tried the tfi module on the dizzy. Nope didn't fix it. Ended up replacing the dizzy and low and behold got it. This year just replaced with the dizzy/tfi module as a set from o'reilly's. 94 dollars plus core and i'm back on the road. Hope this helps.