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P0304 Diagnostic Trouble Code Discussion for September 2014

Cylinder 4 Misfire Detected


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Trouble Ticket Help Requests for DTC P0304
Help Request Posted
2003 Hyundai Sonata GLS 2.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: KMHWF35H93
P0304: Cylinder 4 Misfire Detected. This car had same symptoms a year ago. All cylinders indicate misfire. Car was returned this year but while codes were present, motor ran well, reset MIL status and after a few days the problem reoccurred, vehicle was returned but still runs fine. Are EVAP val...
September 03, 2014
2003 Hyundai Sonata GLS 2.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: KMHWF35H93
P0304: Cylinder 4 Misfire Detected. This car had same symptoms a year ago. All cylinders indicate misfire. Car was returned this year but while codes were present, motor ran well, reset MIL status and after a few days the problem reoccurred, vehicle was returned but still runs fine. Are EVAP val...
September 04, 2014
1999 Nissan Pathfinder LE 3.3L Misfire, Poor Fuel Economy VIN: JN8AR05Y5X
P0304: Cylinder 4 Misfire Detected. Here is a fun one.. The Pathfinder was towed in for a no start condition. Discovered the distributor bearing failed, so I replaced it with a new one. The truck ran well at idle and cruise, but had a part throttle stumble. The customer stated it was doing that ...
September 05, 2014
1999 Nissan Pathfinder LE 3.3L Misfire, Poor Fuel Economy VIN: JN8AR05Y5X
P0304: Cylinder 4 Misfire Detected. Here is a fun one.. The Pathfinder was towed in for a no start condition. Discovered the distributor bearing failed, so I replaced it with a new one. The truck ran well at idle and cruise, but had a part throttle stumble. The customer stated it was doing that ...
September 07, 2014
2009 Audi A3 Quattro 2.0L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out VIN: WAUKF78P89
Car towed in with engine light, edc light and smoke and fuel from tailpipe - checked low side fuel pressure ok - pulled spark plugs #3 fuel soaked - check injector ohms 1.7 for all four - It looks obvious as a bad #3 injector, but feel I might be missing somet...
September 16, 2014
2002 Chevrolet S10 4.3L Misfire, MIL Lamp on
P0304: Cylinder 4 Misfire Detected. car came in bad misfire mil flashing only code was p0300. found worn out plugs,and cap and wire corroded replaced all of them. still had high misfiRE counter on cyl #4 And #6 but not as bad. replaced injectors misfire dropped to none in cyl 6 and very low in c...
September 16, 2014
2007 Audi Q7 3.6L Poor Idle Quality, Misfire, MIL Lamp on
P0304: Cyl 4. Hi there guys, writing this one up before i go home. This 07 Audi Q7 came in after the above mentioned repairs already performed but according to the customer everything is as it was. Same DTC's & driveability concerns. I went as far as doing a visual insp...
September 17, 2014
2008 Chevrolet Suburban 1500 LTZ 5.3L Misfire VIN: 1GNFK16398
P0304: misfire 4 cyl. Thank you guys in advance for your help. Truck came in with a misfire and check engine light. Found a P0300 and a dead miss on #1 cyl. Found NO compression on #1 cyl. Pulled rocker cover and found intake Pushrod not moving. So, we sold R&R heads and fou...
September 19, 2014
2008 Chevrolet Suburban 1500 LTZ 5.3L Misfire VIN: 1GNFK16398
P0304: misfire 4 cyl. Thank you guys in advance for your help. Truck came in with a misfire and check engine light. Found a P0300 and a dead miss on #1 cyl. Found NO compression on #1 cyl. Pulled rocker cover and found intake Pushrod not moving. So, we sold R&R heads and fou...
September 22, 2014