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what would cause (P0304 CEL)?

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Old 03-18-2004, 04:40 PM
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jaypowell78
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Unhappy what would cause this?
P0304
Cylinder 4 Misfire Detected

'03 WRX
 
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Old 03-18-2004, 10:21 PM
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Do a compression check....
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Old 03-18-2004, 10:27 PM
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Car Info: 02 Black Legacy GT
Lightened flywheel or a lighteneed pulley.
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Old 03-19-2004, 12:06 AM
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i have the 301 with intake and bov
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Old 03-19-2004, 06:13 AM
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jaypowell78
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Post and....
did you do anything about it?
 
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Old 03-22-2004, 12:23 PM
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jaypowell78
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btt
bump
 
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Old 03-04-2005, 11:38 AM
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I put a catback exhaust on and got a misfire detected code, reset the ecu and cel didn,t turn back on after running for 50 miles or so. you can still hear the engine misfire thought. VERY WORRIED
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Old 03-10-2005, 07:29 PM
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Check the spark plugs they may have rich fouled and they are just not sparking anymore, get that checked.

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