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p0304 error code XC90 2005

posted by  KlausC on  Wed Mar 7 21:38 CST 2012
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last visit: Fri Oct 24 10:15 CST 2014
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The error message says that cyl 4 is not always firing and has nothing to do with the catastrophic converter :)

Is the wiring for the coil in good shape? When you pulled the plugs, was #4 wet or looking fouled compared the the others? If dry, it might be a failed injector. Also remove the plugs again and with a falshlight, look in each cylinder - you are looking for a clean/dirty cylinder, which will add to the diagnosis.

With the coil pack replaced with new, I suggest that you now check the compression on all 5 cylinders. Make sure the engine is warm, a cold test will lower the compression.

Klaus
--
There is no present time, just the past and future






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New p0304 error code [XC90][2005]
posted by  ynpdude  on Wed Mar 7 20:09 CST 2012 >


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