falls on face when put in drive
Thread Starter
Teching In
Joined: Jan 2008
Posts: 38
Likes: 0
From: pa
falls on face when put in drive when I put my truck into any gear and try to get on it it just boggs real bad and wont even spin the tries and it sounds horrible .the motor runs okay it has some backfires when cold and sometimes when idling warm but revs up fine .the only code is for o2 sensors .the motor is an 04 gto ls1 with the stock 4l60e trans with all electronics intact with a np241 transfer case .any help would be apreciated
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TECH Resident
Joined: Dec 2001
Posts: 922
Likes: 1
From: Lexington Park, MD
Need to slap a scanner on it and give us a data log to crunch on.. RPM, IAT, ECT, MAF, MAP, O2's and timing for starters. That alone would probably give us enough to tell you what's out of wack 
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Thread Starter
Teching In
Joined: Jan 2008
Posts: 38
Likes: 0
From: pa
everything looks good the reader dosent data log !my codes are o2 lean in both banks and now it say ac relay not working which is deleted from my harness and oil pressure switch which is cause I put a mech. gauge in its place .I then put the fuel pressure gauge on and put it in drive and tryed a line lock when I get it just ready to spin it starts to bog bad like there is no fuel but the fuel is 58lbs this is driving me nuts I will try to get another scanner .has anyone had this kind of problem?
TECH Resident
Joined: Dec 2001
Posts: 922
Likes: 1
From: Lexington Park, MD
The O2's are probably telling you the truth then if it's falling on it's face like that. Check those MAF, MAP, IAT (if not MAF integrated) and ECT sensors. Also for any major vac leaks. Anything else modified on the engine or is it completely stock otherwise? Know anyone who has HPtuners, EFI, TECH-II scanner in your area? A scan tool is really your best bet to knowing whats going on.
Thread Starter
Teching In
Joined: Jan 2008
Posts: 38
Likes: 0
From: pa
sprayed everything with ether couldnt find any leaks .the shop that sponsers my truck finnaly got hptuners !!!!so I will be able to check stuff but not till next week!I am going to go buy o2 sensors today and I will use the scanner I borrowed to delete the codes .motor is completely stock !can this be transmission related?
