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Rough running engine - suspect valve issue 850 1994

posted by  KlausC on  Sun Jul 8 09:00 CST 2012
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last visit: Fri Oct 24 10:15 CST 2014
[RELATED]

It could even be something simple like a heavily carboned combustion chamber.

The misfire comes from the knock sensor, strangely enough. Don't ask me how that works, but it sounded good at the time.

Remember, some codes are stored pending reoccurance. Misfires, except multiple, are like that, so an occasional misfire will not turn the CEL on.

A 'sticky' valve, which is not really sticky - just doesn't close completely due to carbon on the valve seat - can sometimes be cured by gently blowing the carbon out. Some of these owners never go over 2500 rpm for weeks at a time, and use regular gasoline.

Oh well, I just sit here waiting for a post that has lots of words and real good descriptions of the problem.



--
My name is Klaus and I am a V♂lv♂holic






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