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General Area => General Discussion => Projects and Updates => Topic started by: HAHNSBIRD on March 13, 2012, 06:29:54 PM

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Title: CYLINDER 1/RANDOM MULTIPLE MISFIRE!!!!!!!!!
Post by: HAHNSBIRD on March 13, 2012, 06:29:54 PM
I have a 2002 Pontiac Trans Am WS6, NEW TCI Automatic transmission and torque converter w/ every bolt-on possible and a little more. I have been dealing with a cylinder 1 misfire for months that that started as a random/multiple misfire. I have replaced all plugs twice w/ new E3 (E3.54) plugs, new msd super conductor plug wires, new coils, new factory fuel injector on #1, new bosch o2 sensors, new mass air sensor, checked compression, new pcv valve, new wix fuel filter, no vacuum leaks, poured in sea foam and other multiple fuel/injector/etc cleaners through gas at every fill up and still have it down to a constant cylinder 1 misfire. Is this a problem that occurs with ls1s? Is it serious or not?
    It drives at over 90% power and sounds good, but anybody who knows their car knows its not perfect. Started as a slightly rough random/multiple misfire and after all new igniton parts were installed it went to a consistent cylinder 1 misfire. Service Light does not flash.
   I do have a custom tuned computer not from an aftermarket programmer. I have full open hookers headers and y pipe going into a magnaflow cat back system. I have slp cold air kit, slp air lid, slp smooth bellows, slp maf and factory maf "i have tried both mafs and get same code", ported throttle body w/ tb spacer, ls6 intake, etc.
    What is wrong??????? Is it electrical???? SOMEONE PLEASE HELP!!!!!
Title: Re: CYLINDER 1/RANDOM MULTIPLE MISFIRE!!!!!!!!!
Post by: november2011 on March 15, 2012, 06:09:59 PM
I can only think of one thing. Each cylinder has a ignition coil right. I have heard from a couple friends that aftermarket ignition coils have been found to be less effective then stock ones. Why that is, no clue. Heard they malfunction or in your case, a possible misfire. Hope this helps.
Greg Baumgartner
Title: Re: CYLINDER 1/RANDOM MULTIPLE MISFIRE!!!!!!!!!
Post by: february2012 on March 15, 2012, 06:11:09 PM
Possibly a head gasket. I had a similar issue with cylinder y and my issue was the headgasket.
Michael Stewart

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