It sounds like a bad throttle position sensor, but that should have set the check engine light. Did you actually check the fuel pressure? Also, as far as vacuum leaks, did you check the EGR valve to make sure it is working properly? FInally, it could be a bad temp sensor. It tells the computer the ambient temp and coolant temp. From that, the coumputer determines how rich to make the fuel mixture. If you are running that rich, that could be bad.
Let me know.
Joe
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Wednesday, February 10th, 2010 AT 12:25 AM