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not coil pack? Still P0304 code S60 2002

posted by  blue244 on  Tue Aug 18 15:11 CST 2009
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last visit: Fri Aug 5 17:02 CST 2011
[RELATED]

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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