90Mustangfan

I was wondering if my O2 sensors were bad they arent but heres the question. If the case that they are bad.If I unplugg them and the car runs better does that mean there bad. I think I still have the original O2 sensors. But the owner before me put on full exhaust so I dont know. how would I check if they need to be replaced?

stanglx2002

yes if you unplug them and the car runs better they are the problem bc i just did that to my car this afternoon and i replaced them and the car runs a lot better

90Mustangfan

ok ill go try that, Thanks