Summary
11The check engine light rarely comes on and if it does it goes off within a day or so. The one code that seems to show indicates O2 sensor high voltage. I had the plugs and wires changed, fuel pump checked (good pressure), and sensors played with to check for any loose connections. I have not checked the fuel filter yet. I am basically trying to troubleshoot before getting into costly repairs. Dry or wet weather doesn't seem to matter. Any ideas? Could it be the O2 sensor? Fuel economy seems good. I thought economy dropped drastically if that was the issue?
My first inclination would be to look at the throttle position sensor voltage. These sensors are a variable resistor with moveable parts inside. Because most drivers tend to operate their vehicle at the same speeds for most of their driving, the throttle position sensor will wear in a very narrow range. Usually the voltage signal drops out for a fraction of a second and the engine hesitates, but if there is a bad internal or external wiring connection, it can operate erratically, such as increasing engine r.p.m. (not usual) or acting like there is no throttle.See the full content of this document
Extract
O2 Sensor a Bad Guess for Loss of Power
Check wiring and voltage signals for the throttle position sensor
11The check engine light rarely comes on and if it does it goes off within a day or so. The one code that seems ...See the full content of this document
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