Question about 1998 Ford Expedition
A P0304 code means that the the car's computer has detected that one of the engine's cylinders is not firing properly. In this case it's cylinder #4.
Posted on Oct 26, 2012
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Posted on Jan 02, 2017
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A P0304 code means that the the car's
computer has detected that one of the engine's cylinders is not firing properly.
In this case it's cylinder #4.
You have covered a couple of the possible causes...here is the list of possible causes that you can use to continue you troubleshooting...Make sure that you CLEAR the code after each repair is made. The fuel injector would be the next i would check, it could be dirty, defective and not firing. The color/condition of the #4 spark plug would give you an idea. Hope this helps...
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