wwmost

if you check engine like is on cuz of the o/r pipe will it make me run rich or anything?

MustangMafia

I would think it would make you run lean. When I had my 98 GT my CEL randomly turned on and I had a place here do a diagnostics check for me. It turned out to be my 02 sensors were shot. The place I got the diagnostics done told me that if I didnt fix them or run MIL's I would run into problems. I dont know if they just said that to make some money off me buying some product through them or not though.