ALLR1SE

I have a 2001 Camaro SS M6 that I received. I hooked up my hp tuner cable up to it to read the tune so I could tune it and I got a 6000 error code. I did some research and it said that the car may have had a handheld tuner hooked to it at one point and had a canned tune. So I tryed pulling the radio fuse as well as cycling the key on and off and had no luck. So I did a write entire putting my buddies 2002 Camaro SS Auto tune in it and downloaded a stock Manual stune from the repository and changed ALL the parameters to match the manual tune and it runs great with everything except WOT. I goes waaaay lean at WOT. At one point I hit 4,000 rpm and it hit PE mode and went to 12.5 afr but it only did it once. Car has SLP intake, SLP MAF, SLP headers and Offroad Y pipe into SLP exhaust. I tried changing the PE tables and had no luck, Any other Ideas I could try? I tried pulling the tune out of my buddies 98 camaro z28 and writing it to the SS but it must have a different program as it wont accept the calibration. Ive gone thru the stock tune 4 times and I know I havent missed anything. All of the sensors seem to be working fine. The throttle only opens 80% it says thru the scanner... could this be part of the problem?

Darkman

iTrader: (2)

You would probably have more luck by posting this in the PCM Diagnostics and Tuning section of this forum.

motion427

iTrader: (1)

12.5afr is not lean at all for a naturally aspirated LS engine.

ALLR1SE

It hits 20.** afr at wot. It only hit 12.5 once and that was after 4k rpm. I will post this there. Thank you

Old Geezer

iTrader: (3)

Maybe try the correct forum??

jmmcamaro2002

Did you check your fuel pressure WOT. I have a similar problem and my fuel pressure drop from a baseline of 55 psi to approximately 30 psi. Time for a new fuel pump, just waiting to get nerve to drop my tank to replace it.

hodge9386

iTrader: (5)

if its only reading 80% max throttle it might not be going to pe. take the maf and everything off and have somebody push the throttle to the floor and see if its actually opening all the way. if it is you might have a bad tps sensor.

sreve

iTrader: (3)

TPS 4.6v ish WOT
20.9 is the natural oxygen level
So a 20:1 afr makes me think the wide band is lying to you.

ALLR1SE

Well we found out the SLP MAF is junk. Ran it unplugged and in OL and all is good.

Exidous

iTrader: (11)

Was the MAF table tuned? Just plugging it in doesn't work out well.