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not coil pack? Still P0304 code S60 2002

It sounds like you have an issue with the intake valves. It is possible that the valve face where it meets the head is warped causing a misfire when cold. I just replaced all the intake valves on an S60 last week with this exact issue. You need to do a cylinder leakage test when the engine is cold. When the engine is hot the leakage won't seem as bad, moderate at best. Doing a compression test while cold should show a low reading on #4.






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New cylinder misfire, rough cold start, baked plug [S60][2002]
posted by  Rockytop  on Thu Aug 13 06:05 CST 2009 >


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