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Puzzling idle

A

aimhigh86

New member
Hey guys!

My GP has progressively been idling rougher and rougher. I have replaced the TPS sensor but that wasn't the problem I guess. Secondly, whenever I disconnect the MAF the car will idle beautiful and then die so naturally I tried a new MAF sensor. The new MAF did'nt fix a thing and same thing happens when I disconnect it, the car will idle nice and smooth and then die. What do you think the problem could be? Could the fueling tables in the PCM become corrupt? I want to try a new PCM but that is another expense so I wanted to see what you guys think. I also tried disconnecting the battery to re-set the PCM but that did not help either. The car will shut-off when I have been on the highway for an extended period of time while I'm forced to decelerate quite hard.

MOds: ZZP PCM, 3.25, headers, 1.9 rockers, intake, exhaust, fuel-rewire etc.......
 
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Everything dies, all the dash lights lite up like a christmas tree. I trip codes for the MAF, TPS, and multiple misfires when it shuts off after a highway trip. Otherwise, the car does not shut off in normal city driving
 


hmmm i wouldn think a vac leak would shut him down on the highway... what exact codes are coming up? are you scanning?
 
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