06-26-2008, 11:16 AM
Well I did a tune-up, my gas mileage was ok for a while, but now it's back to crap. My exhaust spells strongly of gas and I know that I need new O2 sensors...but when I called for prices, the parts person made it quite clear that the O2 sensors don't go bad on their own, that they are fouled by something. He recommened replacing the EGR Valve or emmissions temp sensor. I'd really appreciate some more opinions.