4SFEDZ

iTrader: (6)

ok i drove the car 60 miles to put it on a dyno and the car has never missed or anything always ran good. but ive never driven it more than 15 miles or so at a time. but got to the shop changed plugs and wires put it on the dyno and i was missing bad. so on the drive home at first i didn't notice it but by the time i got home i couldn't accelerate at all. studdering and missing like crazy. what does this sound like. fuel pressure is steady, and i check the wires. could a bad plug do this? i gapped them all the same @35. maybe a coil?

car is a 98 c5 m6 402 with d1sc

Blacklightning744

iTrader: (7)

could be a coil, but it sounds like a bad fuel pump, did the tuners mess around with ur timing at all?

4SFEDZ

iTrader: (6)

no just tryin to get a run 2 see the numbers. my fuel pressure gauge stayed rock solid

99blancoSS

iTrader: (115)

check the wires and plugs, maybe you didnt get one seated properly or a cracked plug. If it was running fine and then you introduced trouble by swaping plugs and wires thats where I would look first.

Unless you did some damage on the dyno ?

4SFEDZ

iTrader: (6)

well it was the first pull and bout half way it started missing and they let out.

Blacklightning744

iTrader: (7)

yea ur right its not a bad fuel pump i was just sayin it sounds like a bad one, as stated up above i'd check to see if its the plugs and wires.