Question about 1993 Saturn SL2

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Vibration in motor

99 Saturn SL2 Seems to be missing on #4 cyl. did tune up Plugs / wires / Coil. Check engine light flashig

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  • lew783 Feb 13, 2009

    No diagnostics - Check engine light always on since I owned car, just started missing on #4 - no weird noise - It just ain't hittin

  • Tommy Walker May 11, 2010

    Did you retrieve a diagnostic code for the problem from the check engine light flashing?

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Check the gap setting on plugs. Also change the O2 sensor. This is usually the check engine light, or EGR-valve. You could also change it too. Then pull positive battery post off for a minute. THis should reset the computer.

Posted on Feb 13, 2009

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If you have the car computer scanned, which many auto parts stores will do free of charge, you will be able to retrieve a code that can point you in the excact direction of the problem. Without being there myself, the only thing I can say to try that I did not see mentioned is to check the fuel injector on the #4 cylinder. They sell a tool called a noid light, you can disconnect the injector and connect this tool to the wires to see if you are getting an injector pulse. If you are getting a pulse then you may have a bad fuel injector.
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Posted on Feb 13, 2009

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I just changed the top motor mount and my vibration stopped. Sounds like your problem.
Rich

Posted on Feb 13, 2009

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