I have a 02 LS1 and my problem is that the fuel trim's won't come on even though they're enabled. I can force them on with the scanner but they won't work other then that. I also just edited this because I finally figured out why it had a high idle. I also apologize for being a noob at tuning. I'm still trying to learn what's what.
Last edited by LNF_AJ; 04-20-2011 at 03:52 PM.
Check your O2 sensors, neither one is working, they are basically static at 450mv. look for a blown fuse, burned wires, etc.
Free HP Tuners Beginners Tuning Guide
LS1 Tuning Guide
Michigan Snowmobiler
1969 Firebird: 11.67@114 [email protected] 1/8 1.70 60 ft. EPS cam 234/246 .602.606 114+3, 6.0 LQ4, L92 heads milled 10.5:1, Ported L76 intake, ported 90mm Holley TB, 100mm MAF, FIC Custom injectors, Hooker LT, PYPES dual exhaust with an X pipe, 4L65e with all of the good parts inside, FTI 4000 RPM Stall, 12 bolt with 3.73 gears. HP Tuner tuned by me
What would be the best way to test an 02 sensor wires? What would happen If the wires were mixed around? The thing that confused me the most was that I could force the fuel trims to come on with the scanner.Originally Posted by 69lt1bird
Got to here on my site http://ls1tuningguide.com/tuninghelpfiles.php you will see GM PCM Pinouts and Schematics, go to that link and look up the 1999-2002 LS1 PCM Schematics. Check you power, grounds, etc.
Free HP Tuners Beginners Tuning Guide
LS1 Tuning Guide
Michigan Snowmobiler
1969 Firebird: 11.67@114 [email protected] 1/8 1.70 60 ft. EPS cam 234/246 .602.606 114+3, 6.0 LQ4, L92 heads milled 10.5:1, Ported L76 intake, ported 90mm Holley TB, 100mm MAF, FIC Custom injectors, Hooker LT, PYPES dual exhaust with an X pipe, 4L65e with all of the good parts inside, FTI 4000 RPM Stall, 12 bolt with 3.73 gears. HP Tuner tuned by me
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