Test drive File Jasmin, 83 jimmy ls3 PSI change o2 min.max drive 2.hpl
Hi there All,
New here and just getting started with HP Tuners.
I have just finished a new GM crate LS3 in a 83 Jimmy. Using PSI wiring harness ECM and TCM. 4L75E.
It is running rich all the time with long term fuel trims @-19 to -25 consistently. O2 sensors are switching normal but low.
To start I was getting a Random Missfire code p0300 and ran -25 LTFT. I adjusted the O2 min/max rich lean to 450mv for both.
now running -19 LTFT and getting rich codes on both banks. I am thinking there is a way to adjust for altitude. or just adjust flow rate?
we are at 3900 ft.
can anyone point me in the direction to adjust fuel. Just want to make sure I am using the right Adjustment.
Current Tune File Jasmin, 83 jimmy ls3 PSI change o2 min.max.hpt
Thanks in advance
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Tyler