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Hey guys I have been pretty busy working on the car and I didn't want to spoil the surprise for my friends cause some of them are on here.. So I finally dropped an LS1 M6 into my car a couple weeks ago. My issue is that the motor is running to lean, I get the codes p0171B and p0174B any help to point me in the right direction would be great! Thanks guys, I'll have pics up soon
I don't have a book to look up those codes, but associating changing trans and now this problem my first choice is o2 sensors because of relative position with work being done on trans.
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1998 Trans Am Convertible A4 - WS6 hood, WS6 air lid, WS6 rims, drilled/slotted rotors.
The codes read Bank 1 and Bank 2 are lean and I swapped all the wires off of the wrecked car onto mine so I don't have a problem with changing the trans. It could be o2 sensors, but both of them be bad at the same time?
The codes read Bank 1 and Bank 2 are lean and I swapped all the wires off of the wrecked car onto mine so I don't have a problem with changing the trans. It could be o2 sensors, but both of them be bad at the same time?
so you have a new engine harness you swapped with trans? What about o2's same ones you have been useing? But I'm thinking you'll need to reprogram the ecu for the trans and maybe difference in wire harness might require different o2 tables. I have heard they are touchy down to wire length but don't know for sure. This sounds like a question for a tuner l
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1998 Trans Am Convertible A4 - WS6 hood, WS6 air lid, WS6 rims, drilled/slotted rotors.
Well this is what I did, I bought a wrecked LS1 car and swapped everything from it into mine, I didn't use any v6 parts at all, so I'm dealing with a stock LS1 for now.
Ok! so ecu, harness, engine, trans, exhaust, etc is all from doner car. So no need to program ecu. I am not sure what else would lean out you car besides o2's but I am not that familiar to LS1's.
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1998 Trans Am Convertible A4 - WS6 hood, WS6 air lid, WS6 rims, drilled/slotted rotors.
Ok thanks, i was thinking injectors cause the car sat for 3 years, so I ran BG fuel injector cleaner (very strong stuff) and after some driving the light shut off and now came back on. It runs a little rough at idle, like it would be misfiring, but I didn't see it misfiring on my scan tool. I may try new injectors or O2 sensors.
02's shouldn't cause it to run lean. they will tell the pcm its lean and then the pcm will try to add fuel. once out of a set range the pcm then sets a fault saying the engine is lean.
normally caused by vacuum leaks, low fuel pressure, exhaust leak(before 02's)
is the pump and everything from the v8 car?
what is the fuel pressure
pcv valve installed and no vacuum leaks?
Hey Larry I was hopping you would stop in, I talked to Dave at Milosch Dodge and he told me that you know everything about LS1's. But anyways yes I have the v8 fuel pump in, and it holds constant pressure, I think it was at like 55psi, I'll check that again tonight. All my vacuum lines are hooked up, I didn't hear any leaks, I'm going to pressure test the vacuum system today. I didn't touch the pcv valve, so I'm gonna pick a new one up today on my way home from school and see what happens.
Oh one more thing, the SES light was on, then I drove about 50 miles or so and turned off, then drove for about 10 miles then came back on. It's done this twice to me so far.
Last edited by 02RedCamaro; May 21st, 2009, 10:04 AM.
Clean the "maf" with some maf cleaner spray, and if it is not a stock maf you may want to find one because aftermarket (slp,granatelli) are known for setting off lean codes.
sigpicMODS: SLP DUAL/DUAL EXHAUST, 160 STAT, MTI LID, SHANER S3 T.B., SMOOTH BELLOWS, DESCREENED MAF, TUNNEL BRACE, UMI SFC & PHB, STRANO SWAY BARS, DRILLED/SLOTTED ROTORS, WHISTLER LIGHTS, BLACK BILLET GRILLE w/69'SS EMBLEM, BLACK SMOOTHED TAIL PANEL w/69'SS EMBLEM, BLACK SS HOOD INSERT, INTIMIDATOR SS WHEELS.
check for the codes. the maf can cause the issue too like said.
does it have an egr?
dave told me someone asked about ls1's
I thought it was another person that stopped by my house though
Clean the "maf" with some maf cleaner spray, and if it is not a stock maf you may want to find one because aftermarket (slp,granatelli) are known for setting off lean codes.
Thanks SSTODD I noticed it was a Granatelli maf, do you think the ecm can be tuned if not then I'm going to try to find a stock one, and see if that eliminates the problem.
Last edited by 02RedCamaro; May 21st, 2009, 10:01 PM.
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