Question about 1994 Oldsmobile 88

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'94 olds Royale 88 series, heavy knocking, car will not idle

Car has heavy knocking, and will not idle or idle very rough then cuts out. Any idea what may cause this?.

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Yes, it is an old car. You most likely have carbon buildup in the cylinders. Use a higher octane gas and drive some highway miles periodically to burn that carbon out (and as part of your maintenance). It gets superheated after driving and ignites the cylinders without the spark plugs sparking.

Posted on Aug 24, 2008

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Bad rod bearings time for a new engine

Posted on Jun 08, 2008

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