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P0304 Diagnostic Trouble Code Discussion for June 2009

Cylinder 4 Misfire Detected


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Trouble Ticket Help Requests for DTC P0304
Help Request Posted
2005 Chrysler 300 (Car) Limited 3.5L Misfire, MIL Lamp on VIN: 2C3AA53G85
P0304: Cylinder 4 Misfire. ... chrysler, idle's fine, no miss. And it drives fine until I hit the brakes to slow down. As soon as I hit the brakes it shutters really bad, like a brake pulsation. However, there's new brakes all the way around. And after so long I'll get a check engine li...
June 01, 2009
1997 Volkswagen Golf GTI VR6 2.8L MIL Lamp on VIN: 3VWHD81H0V
... do not want to throw parts at it; car's been back several times and its a long time customer from prior shop and owner car since new. Car spends more time in customer's garage than on road; multicar family. Reported complaint is MIL Lamp on with various co...
June 01, 2009
2004 Cadillac SRX 3.6L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GYEE63754
P0304: Cylinder 4 Misfire Detected. Hello good technicians out there. Here is the story. This Cadillac came in with a MIL on. We scanned the computer and found a P0420 code (Catalyst efficiency) as well as multiple cylinder missfires. Because of the millage we went ahead and replaced the spark p...
June 03, 2009
2007 Ford Focus SES 2.0L Poor Idle Quality, Misfire VIN: 1FAFP34N17
P0304: cylinder 4 misfire. ... and run the car in park or neutral around 1500 to 1800 the engine misses like crazy and codes po300 p0301 p0302 p0303 p0304 all come back at the same time. i...
June 04, 2009
2002 Porsche 911 Carrera 3.6L MIL Lamp on VIN: WP0CA29902
P0304: misfire 4 cylinder. After 30K service MIL light comes on for a minute or 2 then goes out. Misfire # 4 is noticeable when MIL light is on. The rest of the time it runs perfect. I switched the coil#4 with # 6 cylinder and the misfire code did not change. Not the coil. Changed the o...
June 05, 2009
1999 Ford Ranger XL 2.5L Hesitation, Cuts out, Stall, Misfire VIN: 4F4YR16C6X
P0304: misfire. hello all tech... i need your help really bad. this truck drive me nut.when it idle no complaint.when you snap throttle then release it will stall but when you try to give more gas it act up like plug cat.i did all test...remove exhaust pipe,check fuel pressur...
June 07, 2009
2000 Mercedes-Benz E320 3.2L Misfire, MIL Lamp on VIN: WDBJF65J8Y
P0304: misfire cyl 4. veh came in with complaint of misfire, followed by rough idle. Short test showed 4,5,6, cyl (all on left, drivers side bank) misfiring and cutting off fuel,also had current code for L/FR o2 sensor. Replaced o2 sensor as first step. Test drive revealed that und...
June 10, 2009
2002 Subaru Impreza WRX 2.0L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: JF1GD29632
P0304: Cylinder 4 Misfire Detected. subaru tech, please help on this one. car came in with system too lean and misfire code. LTFT 14.8% STFT 17.2% road test vehicle, car loss power, turbo doesn't kick in like the way it suppose [...] be.fuel trim keep going up after we erease dtc. install smoke ...
June 12, 2009
2001 Mitsubishi Galant ES 3.0L Poor Idle Quality, Hesitation, Stall, Misfire, MIL Lamp on VIN: 4A3AA46H01
P0304: Cylinder 4 Misfire Detected. Car came in from a local dealer with a PO304, we verified the dealers maintenance recommendations and replaced the plugs, cap,rotor and wires along with the valve cover gaskets due to excessive oil in spark plug tubes. After repairs the car continues to interm...
June 15, 2009
2001 Honda CR-V LX 2.0L MIL Lamp on VIN: JHLRD28421
P0304: Cylinder 4 Misfire Detected. ... engine light comes on. A short while later the light will start to flash. Most of the codes are for a misfire. We have never under any condition felt the slightest misfire. We'll sometimes get a code P0172 for rich condi...
June 23, 2009
2004 Volkswagen Passat GLS 1.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: WVWPD63B14
P0304: cyl 4 misfire. Vehicle Came in With Rough Idle. Runs Fine while Driving. First Thing I Saw was the oil filter was pouring oil out of it. Turned out to be the wrong filter. Second Checked All Coils and all were firing and all are updated. Installed New NGK Laser Plugs. Remove...
June 23, 2009
2001 Honda CR-V LX 2.0L MIL Lamp on VIN: JHLRD28421
P0304: Cylinder 4 Misfire Detected. ... engine light comes on. A short while later the light will start to flash. Most of the codes are for a misfire. We have never under any condition felt the slightest misfire. We'll sometimes get a code P0172 for rich condi...
June 24, 2009
2004 Volkswagen Passat GLS 1.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: WVWPD63B14
P0304: cyl 4 misfire. Vehicle Came in With Rough Idle. Runs Fine while Driving. First Thing I Saw was the oil filter was pouring oil out of it. Turned out to be the wrong filter. Second Checked All Coils and all were firing and all are updated. Installed New NGK Laser Plugs. Remove...
June 26, 2009
2000 Honda CR-V SE 2.0L Misfire, MIL Lamp on VIN: JHLRD1874Y
P0304: Cylinder 4 Misfire Detected. Greetings! Hoping someone has been down this road before. Vehicle has a miss at idle - I believe it's a lean miss. Spark plugs replaced about 4 months ago and they look brand new - not a speck of carbon on them. Fuel pressure is good - both static and running....
June 30, 2009