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P0304 Diagnostic Trouble Code Discussion for December 2014

Cylinder 4 Misfire Detected


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Trouble Ticket Help Requests for DTC P0304
Help Request Posted
2005 BMW 760Li 6.0L Misfire, MIL Lamp on VIN: WBAGN83595
P0304: Cly 4 missfire. #4 cly is a dead miss at all times, when plugs were replaced, noted #4 was slightly darker than others. Performed intake leak test, ok. Noted a good amount of carbon on intake valves, performed de carbon. Can the valvetronic fail in a way that would only affec...
December 02, 2014
2005 Volkswagen Passat GLS 2.0L Cuts out VIN: WVWCE63B85
P0304: 4 misfire. hello everyone, Let me first state that I by no means am a VW guy. I have a very strong backround on Cummins diesels but very limited on VW. I was at a dealer for 18 years and serviced all makes and models for the car lot, but seldom got VW diesels. I left th...
December 02, 2014
2002 Subaru Impreza WRX 2.0L Misfire VIN: JF1GD29602
P0304: Cylinder 4 Misfire Detected. These 2 codes come on at various driving conditions. You never feel the miss fires. Car pulls nice under hard acceleration. I put Sea Foam in but have yet to try. Checked for intake manifold leak but none present. Any ideas
December 08, 2014
2008 Mini Cooper S 1.6L Excessive Emissions, Poor Idle Quality, MIL Lamp on VIN: WMWMF73598
Hi everyone, After extensive research I decided to lay the intake back and look at the the valves. all intake valves look very good no crazy build up. (Note this mini driven very little and not very far.) Inspected the timing chain no signs of damage. engine h...
December 09, 2014
2005 Volkswagen Passat GLS 2.0L Cuts out VIN: WVWCE63B85
P0304: 4 misfire. hello everyone, Let me first state that I by no means am a VW guy. I have a very strong backround on Cummins diesels but very limited on VW. I was at a dealer for 18 years and serviced all makes and models for the car lot, but seldom got VW diesels. I left th...
December 15, 2014
2011 Mini Cooper Countryman S ALL4 1.6L Misfire VIN: WMWZC5C59B
P0304: cylinder 4 misfire. The clutch was replaced by customer now have misfire. Will misfire hard under load for about 5 seconds then go into limp mode with limited power. Can cycle the key and it will do it again. Have looked over all work do not see anything damaged or not hooked up ...
December 16, 2014
2003 Mazda Protege ES 2.0L Misfire VIN: JM1BJ22593
P0304: Cylinder 4 Misfire Detected. hi everyone, trying to determine root cause of cylinder number 4 sparkplug ground bending and touching centre electrode closing plug gap over 3000 miles of driving. Replaced once and happens again. Im thinking detonation in cylinder 4, but why? Your thoughts ...
December 18, 2014