1993 Chevy Corsica rough idle

1993 CHEVROLET CORSICA
250,000 MILES • 6 CYL • FWD • AUTOMATIC
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DINGDANG
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my car is idling very rough and stalling out, it blows black smoke bad, very bad fuel milage, got catilic converter cut out and put pipe in and still problems, could it be o2 sensor?
Jul 4, 2009 at 3:31 PM
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RASMATAZ
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Typical symptoms of an engine that is running rich (too much fuel, not enough air) are poor fuel economy, elevated emissions (Carbon monoxide or CO), and engine may have rough idle or surge condition.

Possible causes include a bad O2 sensor, excessive fuel pressure (bad fuel pressure regulator or plugged return line), leaky fuel injectors, dirty air filter or restricted air inlet, or a defective coolant sensor that prevents the engine management system from going into closed loop mode.
Jul 4, 2009 at 7:09 PM