ENGINE RUNS RICH

2002 Ford Ranger

Tiny

alecat

April, 15, 2008 AT 9:07 AM

Engine Performance problem
2002 Ford Ranger 6 cyl Two Wheel Drive Automatic 12000 miles

I have replaced 3 O2 sensors and the engine doesn't seem to run rich at rpm's below 3000. At 3000 the engine hesitates and begins to run rich with black smoke coming from the exaust.

FOUND 362 RELATED QUESTIONS

Runs Rich

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720 Running Rich

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1 Answer

Tiny

merlin2021

April, 15, 2008 AT 2:05 PM

Check the engine coolant temp sensor, Fuel pressure, with particular attention to the pressure regulator...or cloggeg return line.
http://www.2carpros.com/car_repair_video/test_fuel_injection_pressure.htm
Go here and checkout our video.

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