Check out the FAQ portion of www.se-r.net they have a rundown of what it could be. Check for loose vacuum hose, improper MAF ground voltage, O2 sensor (doubt that one) and the EGR tube/valve and BPT valve. Brent > Any idea's? Next step I'm guessing O2 sensors? I > guess it could still be dirty injectors and they just > haven't cleaned up yet. Any guidance would be > appreciated. > Heath