IM GOING TO WRENCH.ITS 04 4.6 I REPLACED FUEL PUMP.THEN GOT THE CODE PO123. IT STARTS BUT RUNS AT HIGH RPMS AND ANOTHER THING THAT COFUSES ME IS THE COOLING FAN FOR THE RADIATOR COMES ON WHEN YOU START IT AND STAYS ON AND THE EXHAUST SMELLS DIFFERENT FROM NORMAL. ITS TOO RICH OR LEAN NOT SURE...
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