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P0304 Diagnostic Trouble Code Discussion for December 2012

Cylinder 4 Misfire Detected

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Trouble Ticket Help Requests for DTC P0304
Help Request Posted
2009 Saab 9-3 2.0T 2.0L Poor Idle Quality VIN: YS3FB52Y89
P0304: Mis-fire cylinder 4. I have a misfire on cylinder #4 only on a cold engine, once it warms up the skip goes away. I have eliminated fuel injector, coil, and spark plug by moving then to another cylinder. compression seem good. Anyone seen this before.
December 01, 2012
2002 Honda Civic EX 1.7L Misfire, MIL Lamp on VIN: 1HGEM21992
P0304: Cylinder 4 misfire. ... and P0304 but the car ran fine no misfires. So we did the basic misfire diag fuel pressure, engine compression, ignition test etc. all seemed good. the valv...
December 10, 2012
2001 Honda CR-V EX 2.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: JHLRD18681
P0304: Cylinder 4 Misfire Detected. ... from another tech. he did a tune up for missfire codes. I now am dealing with it. It missfires @ idle speeds driving or higher rpm its ok! I did some research & found that the timing belt was replaced @ dealer @ 100k miles. Fuel pressure is good, my fr...
December 17, 2012
2007 Chevrolet Aveo LS 1.6L Misfire, MIL Lamp on VIN: KL1TD56647
P0304: Cylinder 4 Misfire Detected. We have misfire codes set when driving under load at freeway speeds or heavy acceleration or possible deceleration after the heavy accel. When misfire codes set the engine runs fine and still has steady power. The scanner shows same amount of misfires on both ...
December 21, 2012
2002 Audi A6 3.0L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on, VIN: WAUJT64B72
P0304: cyl 4 misfire. Car came in running rough with misfire codes. My gut told me to pull the plug off the mass airflow meter and the car immediately smoothed out. Plugged back in and it kept running smooth. Road test and parked until new Maf. Went to pull back in and running bad ...
December 28, 2012
2001 Lexus GS300 3.0L No Start, Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, MIL Lamp on VIN: JT8BD69S51
P0304: Cylinder 4 Misfire Detected. Hey guys, I could really use your help here- this car is giving me a problem. I have inherited this car- I wasn't the tech initially involved. This car is from our dealer used lot. Car was brought to us for the CEL being on. Apparently the initial codes were...
December 28, 2012
2006 Subaru Outback R VDC Limited 3.0L Misfire, MIL Lamp on VIN: 4S4BL84C26
P0304: Cylinder 4 Misfire Detected. This car runs smooth while at the shop, but had misfire codes for all cylinders on the drivers side. We changed the plugs, not sure of what else to do. The car leaves for a few days then came back with the same codes. it has not misfired for us yet, i was hopi...
December 30, 2012