Question about 1999 Pontiac Grand Prix

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Check engine lights comes on when you turn on the key. Then when you are driving it flashes at you. It is running really rough. Like it wants to stall but don't. Has 2 codes P0304 and P0304 pd and mil on. Please help as soon as possible this is my only car and drive clear to Barstow every day to work. 05-04-10 is my only day off. davisthorntoncollins@yahoo.com Car is a 1999 Pontiac Sunfire 2.2 engine

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  • Pontiac Master
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CODE PO304 - CYLINDER 4 MISFIRE DETECTED CONDITIONS. POSSIBLE CAUSE CYLINDER 4 COIL IS BAD CYLINDER 4 FUEL INJECTOR CLOGGED. CYLINDER 4 HAS A INTAKE LEAK.TRY THIS REPLACE FUEL FILTER.FILL GAS TANK UP.PUT A BOTTLE FUEL INJECTOR CLEANER IN GAS TANK DRIVE CAR AROUND TO ALLOW INJECTOR CLEANER CLEAN THE INJECTORS.TELL ME HOW IT WORK.

Posted on May 04, 2010

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Spark plugs that are incorrect for the application, cracked, improperly gaped or worn can cause the engine to misfire or run rough at all times.
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