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1989 while driving check engine light comes on and the car runs rough

(1990 Pontiac Bonneville)
in Medical Lake, WA on December 31, 2014
If I turn it off it comes back fine. Occasionally it will do it again after restart but not always
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on July 01, 2015
check your plugs wores and look under car after it gets warm and see if your catalatic converter is glowing if it glows may need new one
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on July 01, 2015
check your plugs wores and look under car after it gets warm and see if your catalatic converter is glowing if it glows may need new one
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