Will the emissions readiness tests ever complete with a 2 bar OS SD tune (no MAF?)
Ive got my cats back in to pass the sniffer, but my "Once per trip tests" wont complete, even when I follow the standard GM directions to make them complete.
This is an 2004 GTO with the HPTuners 2 Bar OS, which doesn't use the MAF at all (and its not even physically installed anymore)
Unfortunately the amount of mods on this car will prevent going back to a stock tune even if I put a stock 1bar MAP back in it.
Ive double checked all the DTC's:
cat efficency, all the O2 sensor codes, etc, all are like stock except the MAF fail one which kicks it into speed density mode.