Having trouble getting an 02 Vette to pass it's monitors. I've tried several combinations of emissions/non emissions/not reported, but they just don't wanna cooperate.
It's a H/C/I car, has cats (hi flow) downstream 02s are in.
It won't pass the 02 monitor, EVAP, AIR.
I have the criteria (ALLDATA) I understand the system very well. Driveability tech for the last 15 years.
I've had several that were difficult, but this one just doesn't wanna pass em.
I've logged the upstream and downstream 02s, and of course they don't work the way the factory wants them to, but like I say, I've had em pass before.
How are you guys setting them up to pass these?