OK first things first..I am a girl so I can cry My 97 GTP is driving me absolutly insane. My car has been throwing the fuel trim lean bank 1 code pretty much since I bought it. It has a rough idle and used to stall out while idleing I have tried replacing everything I can think of and now I am at a loss. The following have been changed

- MAF sensor
- plugs/wires
- fuel filter
- front 02
- multiple vacum leaks fixed
- injectors checked
- TB cleaned
- smoke tested for any missed vacum leaks
- fuel pressure tested
- compression tested
- battery/alternator wires/connections are all OK
- new battery (not really lean related..but the battery test failed even though the battery That was in the car was fairly new)
- alternator was changed when I first got it

Is there something I am missing?

Did you do the LIM gaskets yet? You can soak the engine in brake cleaner while scanning the front O2 and watch for it to stay near .999 for over a second or so, then you found your leak. Dont forget where the EGR bolts to the LIM.

__________________
2008 Greater Ohio Club Grand Prix President

My Mod List

i have no access to a scanner Ive asked over @ CGP but no one can help. The above has costed me well over 600 bucks to do and Im scared to find out how much the LIM will cost

If you have that massive a vac leak, when you reset your PCM and start the car it should run like crap while it's relearning the fuel trims. It will give you plenty of time to soak everything down with brake cleaner until the idle settles down. Then you found the leak without a scanner.

To reset the PCM unhook the battery for 20 or so minutes.

__________________
2008 Greater Ohio Club Grand Prix President

My Mod List

where are you in NJ? im on staten island i can do the LIM's if you want just supply the materials, and some food! if you want i can try to troubleshoot it for you

I would look into a cracked exhaust manifold or EGR tube.

__________________
1997 GTP - 200k+ miles, PEMs, 3" SS Exhaust w/ Borla Mufflers, 3.4", 180* stat(summer), FWI, 1.84 RR, PT, SLP hood, KYB GR2s, GMPP Handling Kit, etc...

i hope you get er fixed chicka!

__________________
99 DARK BRONZEMIST METALLIC GTP SUPERCHARGED SEDAN. --MODS-- FWI, 104 plugs MSD coils and wires, 180 t-stat, dual thrush exhaust, Kenwood complete system 10' Sub ported, raised spoiler, red calis, D/S Baer rotors, Hawk Pads.

Thanks guys.. I (once again) dropped my car off to a 5th mechanic who also can not find anything. Luckily..this one didnt charge me. He drove it around for about 50 miles w/a scanner and all the readings are fine except my temp gauge is not accurate. So I am totally at a loss.

If it were the exhuast manifolds wouldn't I hear that all of the time? I know that a CAT would probably throw its own code but should I consider that? If there was a problem w/the exhaust..would that show up on a scanner? ( I believe it was autotap w/gm enhancments)

I am live in Sussex County NJ but spend most of my time in Bergen. I'd be happy to make anyone dinner who made the trip out. In fact..my Dad is away almost every weekend and my uncle owns a gas station right next door. Maybe I'll talk to him and see if I can hold a mini mod day.

it might be a sticky injector or clogged fuel rail for bank 1 side the pressure could be good al the way to the needle valve but clogged in between some where or maybe something electrical.it could be sendin half ass current to bank 1 side injectors take a electrical tester an check bank 2 an 1 an compare the 2

A cracked exhaust manifold would not make a noise all the time. When I installed my PEMs, I realized my old front manifold was cracked. I never heard a noise. But it did run better afterwards.

__________________
1997 GTP - 200k+ miles, PEMs, 3" SS Exhaust w/ Borla Mufflers, 3.4", 180* stat(summer), FWI, 1.84 RR, PT, SLP hood, KYB GR2s, GMPP Handling Kit, etc...