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P0304 Diagnostic Trouble Code Discussion for September 2006

Cylinder 4 Misfire Detected


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Trouble Ticket Help Requests for DTC P0304
Help Request Posted
1997 Buick LeSabre Custom 3.8L Misfire VIN: 1G4HP52K3V
P0304: Cyl 4 Misfire Severe. We have swapped injectors, coils, plugs and wires. Running compression shows around 80 psi on good cylinders, only 50 psi on affected cylinders. I'm leaning towards a cooked engine, but others remain unconvinced. Any ideas would be appreciated.
September 01, 2006
2000 Mercedes-Benz ML320 3.2L Hesitation, Misfire, MIL Lamp on VIN: 4JGAB54E6Y
P0304: Cylinder 4 Catalyst damaging misfire. Car came in with cylinders 4, 5, 6 catalyst damaging misfires. Will only occur cold and during post start but not when warm. When accelerating from a stop either with light pedal pressure or WOT, check engine light comes on and flashes, engine runs very rough....
September 06, 2006
2002 Saturn Vue 3.0L MIL Lamp on VIN: 5GZCZ63B32
P0304: Cylinder 4 Misfire Detected. This Saturn was a drive by scanning with an appointment for next monday. I am writing because this is the first time I have encountered this engine and do not know a lot about it. The customer stated that about 1.5 years ago the pcv hose froze up and caused th...
September 13, 2006
1997 Chrysler LHS 3.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2C3HC56F7V
P0304: Cylinder 4 Misfire Detected. ... behind. This car came in on a hook with antifreeze in all the cylinders. The customer drove it till it quit. I pulled the heads and sent them out to be checked. They were worped but found no cracks. Resurfaced and replaced. After test drive I noticed car h...
September 18, 2006
1999 Ford Expedition Eddie Bauer 5.4L Misfire VIN: 1FMPU18L8X
P0304: Misfire cylinder 4. Hello all, Ford techs: Does anyone have service tips regarding ignition coils on 4.6/5.4 engines? I am replacing a LOT of these coils and am wondering if anyone has usefull information to suggest regarding lasting repairs. On this particular truck, #3 and ...
September 18, 2006
1997 Chrysler LHS 3.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2C3HC56F7V
P0304: Cylinder 4 Misfire Detected. ... behind. This car came in on a hook with antifreeze in all the cylinders. The customer drove it till it quit. I pulled the heads and sent them out to be checked. They were worped but found no cracks. Resurfaced and replaced. After test drive I noticed car h...
September 20, 2006