I put my new tweecer in the truck last weekend. Ever sence I put it in I have head a check engine light. The EGR is tured off and the Thromactor as well. What could be causing this? The truck runs good other wise.
mine started as soon as I put the Tweecer in the truck. Everything is turned off that should be turned off and what not. I ran a EEC Tuner for 3 years and never had a check engin light.