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Anonymous
Anonymous Posted on Aug 31, 2011
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96 gmc 5.7..too much fuel to the injectors, fowling plugs and runs rough//showing codes of multible miss fires and 02 sensoer whitch has been replaced

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Jonah Oneal

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  • Posted on Aug 31, 2011
Jonah Oneal
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RICH FUEL MIXTURE CAN BE CAUSED BY FAULTY FUEL PRESSURE REGULATOR.RESTRICTED FUEL RETURN LINE.LEAKING FUEL INJECTORS CAUSED BY CARBON BUILT UP INSIDE PINTLE TIP OF THE FUEL INJECTOR.CLEAN FUEL INJECTORS ADD CAN OF SEAFOAM TO 3/4 TO FULL TANK OF GAS.WEAK SPARK FROM IGNITION COIL WILL CAUSE SPARK PLUGS TO MISFIRE FOUL OUT.

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  • GMC Master 2,050 Answers
  • Posted on Aug 31, 2011
Anonymous
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Could be a number of issues. Fuel pressure or regulator issue, but...
If you have a coolant sensor problem, as in reading wrong, and it tells your computer it is colder than it actually is,,,you will get more fuel delivery.

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