ok i just got back from iraq and my wife bought me a 2005 cobalt ss and i had the ottp stage 2 kit put on while i was over there ok now to the problem the car is falling on its face it feels like a miss fire checked plugs and they looked good but i replaced them anyways clean the throttle body and checked the air filter aswell still does it the cell blinks and then stays on then goes off and does it all over again please help

 

What codes are popping up first?

 

yeah get the codes read ... first step after that post them up ile help ya out... ( do u got a wideband>? if so whats it reading?)

 

Well im pretty sure hes misfiring because when i was misfiring my CEL was flashing when it was doing that

Oh and what sparkplug gap are you running? And what plugs?

 

are you sure you have the tune flashed on your car?

 

well i sent my pcm in first so i hope i have a tune and the gap is at 32 what should it be at i'll get the codes read tommrow after work

 

my ideas at the moment are fuel filter/ pump and maybe a clogged cat how many miles on the car?

 

50k ish

 

try the simple stuff first. Two main things I would check are the CAI filter and Throttle body being dirty but if you have done that then spark plugs and PCM or Injectors. If it ran fine before check what was newly installed.

 

i believe the recommended gap for stage 2 is 35. Also find out the the code im guessing itll probably be a p0300 random multiple cylinder misfire

 

CASE relearn due to PCM replacement.

 

ok its a p0172 and p0301 the only 2 codes tha show up

it ran fine for 400 miles or so but that was with my mother in law driving it then when i get home and see what it can do thats when it started being dumb i didn't add anything after the stage 2 kit was put on and she was drove it for 400 miles to my new house and it was fine