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P0304 Diagnostic Trouble Code Discussion for September 2012

Cylinder 4 Misfire Detected

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Trouble Ticket Help Requests for DTC P0304
Help Request Posted
2002 Chevrolet S10 4.3L Misfire VIN: 1GCDT19W62
P0304: Cylinder 4 Misfire Detected. We bought this truck for cheap at a local sale cause the crank was bad in it. I installed a crank and all was good but we have a misfire on cylinders 1 and 4. Not sure if the misfires were there before or not, but I'm thinking not. The new crank did not come w...
September 05, 2012
2004 Ford F-150 FX4 5.4L Misfire VIN: 1FTPW145X4
P0304: Cylinder Misfire. Customer called with check engine light flashing and drove over two hour - against advise. Thought for sure cats would be melted down and plugged. So replaced plugs checked coils and injectors ok. Now found 1,2,3,4 dead and 5,6,7,8 firing normally. No exhaust ...
September 09, 2012
2004 Isuzu Axiom S 3.5L Cuts out VIN: 4S2DF58YX4
P0304: Cylinder 4 Misfire Detected. ... drove. Vehicle lacked power and felt stuffed. Checked back pressure, found it high on bank 2. Cut cat off, put test pipe in place for diagnosing and test drove. Vehicle now had power but would intermittantly cut out, almost like electronic throttle control...
September 11, 2012
2001 Jeep Cherokee Classic 4.0L MIL Lamp on VIN: 1J4FT58S01
P0304: Cylinder 4 Misfire Detected. ... having issues pinpointing the issue. Had codes stored for #5 injector circuit and #5 misfire so I cleared the codes started it up and no misfires runs like a champ I go test drive it around the block with no issues at cruising speeds or full throttle. As I...
September 20, 2012
2002 Subaru Impreza WRX 2.0L Misfire, MIL Lamp on VIN: JF1GD29682
P0304: Cylinder 4 Misfire Detected. ... WRX that missfires all the time, especially at idle. The check engine light flashes and the two codes are P303B, and P304. The customer has replaced the spark plugs already with some that he bought at the dealership. They look new. The COP has also been re...
September 27, 2012