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P0304 Diagnostic Trouble Code Discussion for August 2007

Cylinder 4 Misfire Detected


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Trouble Ticket Help Requests for DTC P0304
Help Request Posted
2001 Acura MDX 3.5L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 2HNYD18212
P0304: Cylinder 4 Misfire Detected. Vehicle came into shop running on about 3 cylinders. We had tested all of ignition and fuel pressure. All codes listed about existed. Pulled and cleaned all egr ports in upper plenum. Vehicle does run a little better. Now have code p1399=Any cylinder misfiring...
August 02, 2007
2002 Toyota Sienna LE 3.0L Misfire, MIL Lamp on VIN: 4T3ZF13C9Z
P0304: Cylinder 4 Misfire Detected. This one has me stumped. It is definitely misfiring and it shows on the Toyota scanner. The STFT on bank 2 is -20% at idle and -5% to -6% at 2500 rpm. Bank 1 trims are near 0. The plugs show signs of over fueling. The Bank 2 VVT never shows to activate like th...
August 06, 2007
1998 Chevrolet K1500 Cheyenne 5.7L Misfire VIN: 2GCEK19R4W
P0304: Cylinder 4 Misfire Detected. well I have another one here guys and gals. came into shop with trans. issues hi miles and tcc p1870 hard shifts. we did a pulse width modulation update and seemed to work good.Customer came back few days later felt like tcc shudder and then signal interrupted...
August 09, 2007
2000 Ford Escort ZX2 2.0L Misfire, MIL Lamp on VIN: 3FAKP1138Y
P0304: Misfire detected cylinder 4. This car came in for a tuneup. He had driven it for about an hour and it was bucking/jerking on acceleration, but not like a single cylinder misfire. I took him home while this was happening, but the next day when we had time to work on it, it was running go...
August 10, 2007
2002 Volkswagen Passat GLS 1.8L No Start, MIL Lamp on VIN: WVWPD63B72
P0304: Cylinder 4 misfire. ... it was running really bad and then just shut off. Has a P0304 code for cyl 4 mis-fire, the electrical connector to the coil and the coil itself are melted. My scanner is being repaired at this time so I just have a generic code reader, the only data that I...
August 13, 2007
2001 Dodge Dakota 3.9L Misfire VIN: 1B7GL22X41
P0304: Cylinder 4 Misfire Detected. Techs: have a Dakota pick up that at times will misfire on cylinders 2, 4 and 6 only. Fuel pressure is good (50 psi) and I am thinking something with intake since it is only happening on the right side. Any info much appreciated!!
August 16, 2007
1998 Mitsubishi Diamante LS 3.5L Misfire, MIL Lamp on, Lack of Power VIN: 6MMAP57P3W
P0304: Cylinder 4 Misfire Detected. Car came in with intermittent miss and lack of power. Scan tested and found code PO304. Replaced ign. wires and v/c gaskets. Small amount of oil in plug holes. Wires were original and KV tested high. Inspected plugs. Has Iridium NGk plugs and they are at .043 ...
August 16, 2007
1999 Ford F-150 Lariat 5.4L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1FTRX17L7X
P0304: 4 misfire. truck came in and found the below codes in the computer. replaced all spark plugs and they where at 80-85 thousands gap when i pulled them out. finished tune up and restarted truck but was still not idling very good. started to check for other codes and found ...
August 17, 2007
1997 Dodge Avenger 2.5L Stall VIN: 4BEAU52N2V
P0304: Cylinder 4 Misfire Detected. Mitsu/ Dodge fans please look into crystal ball. This car came in with inter stall. I immediately hooked up fuel gauge, spark tester and injector pulse tester. Wanted to monitor what I was loosing. Car appears to loose none of the above. Holds fuel pressure, W...
August 28, 2007
2002 Toyota Sienna LE 3.0L Misfire, MIL Lamp on VIN: 4T3ZF13C9Z
P0304: Cylinder 4 Misfire Detected. This one has me stumped. It is definitely misfiring and it shows on the Toyota scanner. The STFT on bank 2 is -20% at idle and -5% to -6% at 2500 rpm. Bank 1 trims are near 0. The plugs show signs of over fueling. The Bank 2 VVT never shows to activate like th...
August 29, 2007
1998 Volvo S70 2.4L MIL Lamp on VIN: YV1LS576W1
P0304: cyl 4 misfire. This car will set misfire codes intermittantly, no driveability concerns. Freeze frame showed STFT -7.8% LTFT 3.9%. Have performed smoke test for intake leaks, car has plenty of power and runs very smooth. Last time car was in for check engine light it had the...
August 30, 2007
2001 Acura MDX 3.5L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 2HNYD18212
P0304: Cylinder 4 Misfire Detected. Vehicle came into shop running on about 3 cylinders. We had tested all of ignition and fuel pressure. All codes listed about existed. Pulled and cleaned all egr ports in upper plenum. Vehicle does run a little better. Now have code p1399=Any cylinder misfiring...
August 02, 2007
2002 Toyota Sienna LE 3.0L Misfire, MIL Lamp on VIN: 4T3ZF13C9Z
P0304: Cylinder 4 Misfire Detected. This one has me stumped. It is definitely misfiring and it shows on the Toyota scanner. The STFT on bank 2 is -20% at idle and -5% to -6% at 2500 rpm. Bank 1 trims are near 0. The plugs show signs of over fueling. The Bank 2 VVT never shows to activate like th...
August 06, 2007
1998 Chevrolet K1500 Cheyenne 5.7L Misfire VIN: 2GCEK19R4W
P0304: Cylinder 4 Misfire Detected. well I have another one here guys and gals. came into shop with trans. issues hi miles and tcc p1870 hard shifts. we did a pulse width modulation update and seemed to work good.Customer came back few days later felt like tcc shudder and then signal interrupted...
August 09, 2007
2000 Ford Escort ZX2 2.0L Misfire, MIL Lamp on VIN: 3FAKP1138Y
P0304: Misfire detected cylinder 4. This car came in for a tuneup. He had driven it for about an hour and it was bucking/jerking on acceleration, but not like a single cylinder misfire. I took him home while this was happening, but the next day when we had time to work on it, it was running go...
August 10, 2007
2002 Volkswagen Passat GLS 1.8L No Start, MIL Lamp on VIN: WVWPD63B72
P0304: Cylinder 4 misfire. ... it was running really bad and then just shut off. Has a P0304 code for cyl 4 mis-fire, the electrical connector to the coil and the coil itself are melted. My scanner is being repaired at this time so I just have a generic code reader, the only data that I...
August 13, 2007
2001 Dodge Dakota 3.9L Misfire VIN: 1B7GL22X41
P0304: Cylinder 4 Misfire Detected. Techs: have a Dakota pick up that at times will misfire on cylinders 2, 4 and 6 only. Fuel pressure is good (50 psi) and I am thinking something with intake since it is only happening on the right side. Any info much appreciated!!
August 16, 2007
1998 Mitsubishi Diamante LS 3.5L Misfire, MIL Lamp on, Lack of Power VIN: 6MMAP57P3W
P0304: Cylinder 4 Misfire Detected. Car came in with intermittent miss and lack of power. Scan tested and found code PO304. Replaced ign. wires and v/c gaskets. Small amount of oil in plug holes. Wires were original and KV tested high. Inspected plugs. Has Iridium NGk plugs and they are at .043 ...
August 16, 2007
1999 Ford F-150 Lariat 5.4L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1FTRX17L7X
P0304: 4 misfire. truck came in and found the below codes in the computer. replaced all spark plugs and they where at 80-85 thousands gap when i pulled them out. finished tune up and restarted truck but was still not idling very good. started to check for other codes and found ...
August 17, 2007
1997 Dodge Avenger 2.5L Stall VIN: 4BEAU52N2V
P0304: Cylinder 4 Misfire Detected. Mitsu/ Dodge fans please look into crystal ball. This car came in with inter stall. I immediately hooked up fuel gauge, spark tester and injector pulse tester. Wanted to monitor what I was loosing. Car appears to loose none of the above. Holds fuel pressure, W...
August 28, 2007
2002 Toyota Sienna LE 3.0L Misfire, MIL Lamp on VIN: 4T3ZF13C9Z
P0304: Cylinder 4 Misfire Detected. This one has me stumped. It is definitely misfiring and it shows on the Toyota scanner. The STFT on bank 2 is -20% at idle and -5% to -6% at 2500 rpm. Bank 1 trims are near 0. The plugs show signs of over fueling. The Bank 2 VVT never shows to activate like th...
August 29, 2007
1998 Volvo S70 2.4L MIL Lamp on VIN: YV1LS576W1
P0304: cyl 4 misfire. This car will set misfire codes intermittantly, no driveability concerns. Freeze frame showed STFT -7.8% LTFT 3.9%. Have performed smoke test for intake leaks, car has plenty of power and runs very smooth. Last time car was in for check engine light it had the...
August 30, 2007