OBD code reader PO3O4-cylinder 4 misfire

1997 MERCURY COUGAR
162,000 MILES
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COUGARPURRFECT
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(1997 mercury cougar 4.6L) Service engine soon light went on recently(again) read the code with an OBD code reader I bought. What does this mean, im also wondering what price range I may be looking at to correct the problem (guesstimate). Curious cuz I need to know if I have enough saved up to deal with the problem. Thankz.
May 13, 2013 at 7:37 AM
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CARADIODOC
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That's one of the few codes that means just what it says. Cylinder four is misfiring at times. It could be as simple as a fouled spark plug or bad spark plug wire. The most serious cause would be compression-related like a burned valve or worn camshaft lobe. A fuel injector could be plugged too but that is not real common.
May 13, 2013 at 10:34 AM
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COUGARPURRFECT
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Thank you (timez a million) for the insight .....
May 13, 2013 at 11:58 AM
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