Is it possible for a specific "function" of a PCM to go bad?
I have a 98 that I had PE set pretty much dead on, and as I began to tune the shift points of a new transmission, I noticed it was not going rich at WOT. I am targeting around 11-0/11-3 and it is barely getting into the 13s. None of the settings have changed and everything that activates PE looks to be in place.
Could the PCM just be bad?
C5- forged LS2, ported Dart pro 1s, custom Tick blower cam, P1SC1 at 13psi, 4" intake and charge pipe, alky control 100% meth w dual injectors, 255 walburo, BAP, yella terra, FAST 90, ported LS2 TB, RPM stage VI, SY3500, 3.42, 335 Ra1, Lots of Body mods
I am having similar problem with my 98 ecm
but mine dumps mad fuel my af is pegged at 10 when at wot
tune is good but the ecm is not making the necessary changes
next step for me is to replace the ecm.
This happened on my old 2000 Camaro...it was the MAF sensor failing, not the PCM.
2010 Camaro SS M6. Stock Bottom End, Heads/Cam/Intake/Headers/Exhaust.
2005 Silverado RCSB. Forged 370 LQ9/Borg-Forced Inductions T6 S484/Jake's Stage 4 4L80E with D3 Brake/4WD.
2023 Durango Hellcat
Reply With Quote