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Originally Posted by bryans restoration
thanks for all the advice bnaylor but ive got bigger probs now. right after i sent that last message i jumped in my car to go home and the mofo wouldnt start!! i am now getting no spark whatsoever. we have a 1999 monte Z34 with the 3.8 on the lot for sale. so i took the ICM off of that car and swapped it with mine. both units are indentical. i plugged it in my ride and still no spark! i plugged mine in the monte and it runs great from top to bottom cold or hot. the swap took about 15 mins. i am stumped so i called the wrecker and had it towed down to caddy corner (a business partner) they work on GM cars only and i told my mechanic that i dont want it back till its running perfect. so i will be paying out my ass probably. i think it is either the computer or the crank sensor?? if it is the computer who sells the best reprogrammed unit? and do you think that i should be running those 605's or the 104's. when it gets back i have a fabbed exhaust peice with a nut welded to it for the u-bend delete. im still not sure. thanks again.. ryan
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Definitely not good news. On the CKPS or PCM, it's 50/50 but I'd put my odds on the crank sensor since there is no spark and starting is difficult. Maybe it is the root of all your problems.
If it turns out to be the PCM, check with Ed Morad on EBay or ClubGP. He has them for as low as $55. Just make sure it matches your year GTP.
Whether you run Autolite 605 or 104 is dependent on gas quality and any knock retard that may show. But either will work with a 3.4 SC pulley. Good luck!