P1351 ICM CirHighVoltage (seems to be unsolvable)
Posted this on every LT1 related forum I could find.
1996 M6 Camaro Z28
Alright, I have had this problem for about 4 months now if not more, the engine itself has 20k on it, and I put it in myself. All ignition parts are brand new, heres a list of the new parts:
CKP (replaced when engine was built)
Optispark Wire Harness Connector
Eng Temp Sensor
The car has alot of vibration when running (from the stumbling at all rpms) and basically runs like crap and backfires/misfires horribly, doesnt overheat or nothin like that, but when I floor it, doesnt wanna go rite away and will pickup some but the rpm's dont climb quick like they use too. I have 2 96/T-56 PCM's and 1 is stock with stock knock module and the other is tuned for the 360ci LT1 (rebuilt to this 388) and has LT4 knock module. Timing chain is the only other concern, was on the motor when I got the car, had 15k, was used in the 360 for about 20k and is currently used in this motor for 20k so far, so a total of about 60k on the chain. I spun the crank hub off not too long ago and had to put a helicoil in the crank and buy a new aftermarket keyed hub from Powerbond I belive it was.
Recent info: Had the car scanned, it has only the P1351 present now, replaced the wiring harness with one I got from a local guy, everything was in tact, low mileage, all connectors were there. Now I know its 1 in a million if I found a harness that would have the same prob so Im going to rule that out + the guy had no problems out of it when it was pulled, the car didnt have a motor cuz he pulled it. I need to know everything related to this code, this is a battle that I dont think I will ever win. Ive gotten to the point of just replacing parts because it has stumped me. P1351 is also suppose to disable the injectors, and it shouldnt start nor run, but it does. Taken it to a couple of shops, they looked at it for awhile and still didnt know what the problem was and I basically handed them free money.
I need any and all input as to what yall would think could be causing this, I think its something else triggering it that isnt suppose to, as in a problem that is setting off the wrong code, im really leaning toward replacing the timing chain and reluctor wheel and seeing if that dont change it all. I was counting on the new harness to stop this because it was an electrical code. Thanks