Yea that's what I was asking. When the PCM is stock and the car is stock, how many times does it run this test? My understanding is that it runs it a few times a drive cycle. So what's the difference if it runs it and fails a few times a drive cycle and it doesn't set any codes or it runs it a few times a drive cycle and it passes and doesn't set any codes. Or does it run once and if it passes not run again? I'm not trying to fight with anyone I'm new to this 3800 tuning thing and would like to be able to run no cat or hi flow cat and not set the cel if possible. There's lots of theories but no definite answer.
