Question about 1997 Chevrolet Cavalier

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MISFIRE ON ALL CYLINDERS

1997 2.2 WILL NOT DO 20MILES AN HOUR REPACED WIRES PLUGS CAT AND ALL INJECTORS ALONG WITH FUEL FILTER COULD IT BE THE CONTOL MODULE OR COIL PACKS CAUSING THIS -I HOPE IT NOT THE MODULE DO TO THE FACT ITS ALMOST 300.00 PLEASE HELP

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  • blueextc3221
    blueextc3221 May 11, 2010

    This does not sound like there is a problem with the coil packs, there is another source that is causing the random misfires in all cylinders,are there any other codes?
    The problem could be caused by and EGR problem, contaminated fuel or a vacuum or intake air leak, these are common to all cylinders.

    Are there any CEL? Even if there is no light - check with OBD reader because the bulb may be out or pulled out by previous owner.

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Hello, As you have probably already figured out , there are many things that can do this. here are some things you need to check.
Ck fuel pressure. It should be between 41-47 lbs
Ck coolant temp sensor. At operating temperature (194 degrees) it should be about 241 ohms, At 104 degrees about 1459 ohms
At 70 degrees, it should be about 3500 ohms.
If you want to ck the intake air temp sensor, you can use the same ohm readings as the coolant sensor.
The coil packs are certainly a good possibility. They do fail.
Ck your crankshaft position sensor. It should be 800-1200 ohms.
If you can't figure this out yourself, you may need to find someone that has a scanner. This may help you.diagnose this problem.
If you find this information to be correct would you please enter a "fixya" rating.
Thanks, Gator241

Posted on Feb 09, 2009

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