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P0304 Diagnostic Trouble Code Discussion for January 2019

Cylinder 4 Misfire Detected

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Trouble Ticket Help Requests for DTC P0304
Help Request Posted
2014 Maserati Quattroporte S Q4 3.0L Stall VIN: ZAM56RRA3E
P0304: cylinder 4 misfire. Vehicle came in on the hook. We went to check the car it started right up. We scanned for codes. Found misfire code for cylinder 4, but vehicle was not missing. Customer sais he didn't feel any misfires, but car just died. We have fuel pressure. Only there...
January 02, 2019
2010 Hyundai Accent GS 1.6L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Misfire VIN: KMHCM3ACXA
P0304: Misfire 4 Cylinder. Vehicle came in on the tow. Customer was afraid to let it run due to how much the engine would shake and because of the carbon coming out of the exhaust system. Started it. Yes engine would shake. Pulled codes, misfires. Check spark plugs, full of fuel, ...
January 22, 2019
2009 Audi A4 Quattro 2.0L Poor Idle Quality, Hesitation, Surge, Misfire, MIL Lamp on VIN: WAUVF78K79
P0304: Misfire cyl 4. After replacing the crankcase regulating valve and completing an enjoyable 12 mile test drive the engine all of a sudden now runs extremely rough, with misfiring. Multiple scan tools is showing a negative High Fuel Pressure reading despite swapping known g...
January 24, 2019