PTRIMBLE347

I have a 92 GT with a 351W, Msd pro billet dist. 42lb injectors, 70mm tb matching mass air and trick flow upper and lower intake and trick flow heads. My problem/ question is under normal acceleration its ok but if I get in the throttle hard it breaks up from 3500 to 4000 rpm then clears out and then flat out runs great. any suggestions?

Duncan_GT

Have you had it tuned?

89fiveeight

You gotta tune your fuel map, it's got a nasty hole.

F&F reference points

uedlose

I would look to see if the timing is advancing right when you smack the gas. What is timing set at what plug gap? what is F/P set at?

aode08

yeah the stock ecm is tolerable but not for all that you got man