1999 Chevy Cavalier cooling fan

1999 CHEVROLET CAVALIER
180,000 MILES • 4 CYL • FWD • AUTOMATIC
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HURTFEELINGS
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i have 1999 cavalier and the engine cooling fan is always running, i changed the temperature sensor, fuses, and checked all the wiring it is possisble that my obd is faulty .
Dec 13, 2008 at 12:00 PM
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MMPRINCE4000
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More than likely the fan switch is bad. When it fails, it will default to running all the time to prevent overheating.

Also possible the relay is stuck, but I would replace the fan switch first.
Dec 15, 2008 at 7:09 AM
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HURTFEELINGS
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i switched the relay, but it did'nt stop, also it burns gas horribly, shoots out black smoke, and the check engine light is on, it all started when a local mechanic broke temperature sensor trying to put on a new belt, please help i have to drive this car 60 miles to work back and forth
Dec 15, 2008 at 3:45 PM
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HURTFEELINGS
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also could it be the wrong antifreeze causing these problems
Dec 15, 2008 at 3:46 PM
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MMPRINCE4000
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Take the car to any autoparts store for a free scan. See what the codes are.

If temp sensor is not working, it will run rich and cause a lot of driveability problems.

Have the scanner set to live data mode and see what PCM is reading as engine temp. If low 0 to -20, then the coolant temp switch is bad.

Do not confuse the coolant temp sender with the fan switch or the temp gauge sender.
Dec 16, 2008 at 8:56 AM
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