Came here looking for some help on my beloved GTP. Glad to be parts of what looks like a great forum. Any and all help greatly appreciated.
So here goes.
I am at a loss, I have searched everywhere. I have a semi built Turbo swapped 1997 GTP, Built the car myself, Tuned on HP tuner on a dyno twice.
Car put down great numbers. However I have a Random misfire and it seems to be at only Idle and worse when its warmed up. Most of the time does not throw a code, I took my Timing light to all wires and the misfires are only happening on the Back 3 Cylinders, 2-4 and 6.
1-3 and 5 fire great.
I have Swapped Plugs, Wired, ICM, PCM, New plugs gapped properly, 10.5 MM Wires,mCoil packs.... Even bought a complete matching 97 running parts car to swap parts off, I have done EVERYTHING. I can manually pull the wires off the coil packs and watch 2-4 and 6 misfire at the packs consistently.
Car pulls like a freight train WOT. But at Idle it randomly misses.
Maybe a cps? or a Cam position sensor? It seems that its somewhere between the Computer and the ICM.
Thoughts?
What would cause this on the back 3 Cylinders??
Appreciate the help.
