1992 Ford Explorer VEHICLE SMOKING

1992 FORD EXPLORER
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TASHANO
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1992 Ford Explorer

when i got the vehicle it was smoking. i changed the idle air control valve and the air flow unit. It is still smoking. Can you tell me why?
May 15, 2010 at 6:57 PM
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RASMATAZ
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What kind of smoke is it?
May 15, 2010 at 7:39 PM
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TASHANO
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Very black smoke.
May 16, 2010 at 7:45 AM
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RASMATAZ
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Probable causes of an engine running rich are as follows:

1.Fuel pressure not within specs.Can be cause by restricted fuel return line or defective fuel pressure regulator.
2.Defective Oxygen Sensors.
3.Leaking injectors.
4.Coolant temperature sensor out of calibration.
5.Restricted air intake system.
May 16, 2010 at 3:39 PM
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TASHANO
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Thanks for your advice. The engine light stays on. How do I turn it off?
May 22, 2010 at 4:29 PM
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RASMATAZ
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Try disconnecting the battery for a few minutes and see what happens-If the check engine light still On-you have problem with a sensor, its wiring or the computer
May 22, 2010 at 6:11 PM