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Ignition/Tuner/ECM/Fuel InjectionNeed advice on ignition issues? Questions about a tuner? Have questions about a EFI calibration or Fuel Injection? Tips on Engine Diagnostics, how to get codes, and what they mean. Find your answers here.
Took a 300+ mile trip to the west coast, got back home, shortly there after ran out of gas long before I should have. Filled it up, and the fuel light came on way too soon. Filled it again, and found I was down from 45 MPG to 40 MPG. Drove me nuts trying to figure out why. Have pipes, AC, and PCIII USB. Finally hit me, I checked, and one of the O2 sensor by-pass caps had fallen off. DUH. Sure made a difference in fuel mileage.
Took a 300+ mile trip to the west coast, got back home, shortly there after ran out of gas long before I should have. Filled it up, and the fuel light came on way too soon. Filled it again, and found I was down from 45 MPG to 40 MPG. Drove me nuts trying to figure out why. Have pipes, AC, and PCIII USB. Finally hit me, I checked, and one of the O2 sensor by-pass caps had fallen off. DUH. Sure made a difference in fuel mileage.
Did your "check engine" light come on? I would imagine that having an open O2-sensor circuit would throw a fault code.
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