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P0304 Diagnostic Trouble Code Discussion for April 2011

Cylinder 4 Misfire Detected


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Trouble Ticket Help Requests for DTC P0304
Help Request Posted
2006 Kia Sedona EX 3.8L Poor Idle Quality, Surge, Stall, Misfire, MIL Lamp on VIN: KNDMB23366
P0304: Cylinder 4 Misfire Detected. I also replace all spark plugs and switch ignition coils , still has same problem .
April 05, 2011
2003 Volkswagen Passat GLS 1.8L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: WVWPD63B63
P0304: misfire 4 cyl. Car came in misfiring and barely running at idle. Car runs just great soon as you drive it or even if u bring revs off idle. Replaced plugs and then checked later and were fouled after not much running time at idle. LTFT 10% STFT 25% after a short 10 min drive...
April 07, 2011
2004 Volvo V40 1.9L No Start, Stall, Misfire, MIL Lamp on VIN: YV1VW27534
P0304: Cyl 4 misfire. ... with complaint of extended crank time and check engine light when stared after 2 or more hours.We have noted a start and stall and then restartes with very rough idle. After just a couple minutes it clears up and runs perfect. Has set p0304 during this per...
April 17, 2011
2006 Ford F-250 Super Duty XL 5.4L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 1FTSX21506
P0304: Fault Cylinder 4 Misfire Detected. This vehicle came in running rough with these codes.Figured few coils would fix 3&4. Thought had ticking noise on #1 bank. Pulled valve cover looking for broken valve spring and all is good with good compression. Truck misses instantly on start up, pops cy...
April 25, 2011
2001 Subaru Outback 2.5L Misfire VIN: 4S3BH66571
P0304: Cylinder 4 Misfire Detected. I need some ideas on this problem. This 4cyl.Outback has a intermittent #4 misfire.I've replaced spark plugs,ignition wire set and ignition coil with all OE parts,but the same problem.Since the misfire is so intermittent,I never could duplicate the problem whi...
April 28, 2011
2004 Isuzu Rodeo S 3.5L Misfire VIN: 1S2DM58Y14
P0304: Cylinder 4 Misfire Detected. Vehicle came in with #3 misfire. Diagnosed as bad #3 injector. Replaced inj. and it ran fine for about [...]. Came back with #4 misfire, also diagnosed as bad injector. On test drive after replace #4 inj. #5 started missing. Low line fuel pressure seems to be ...
April 29, 2011
2006 Kia Sedona EX 3.8L Poor Idle Quality, Surge, Stall, Misfire, MIL Lamp on VIN: KNDMB23366
P0304: Cylinder 4 Misfire Detected. I also replace all spark plugs and switch ignition coils , still has same problem .
April 05, 2011
2003 Volkswagen Passat GLS 1.8L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: WVWPD63B63
P0304: misfire 4 cyl. Car came in misfiring and barely running at idle. Car runs just great soon as you drive it or even if u bring revs off idle. Replaced plugs and then checked later and were fouled after not much running time at idle. LTFT 10% STFT 25% after a short 10 min drive...
April 07, 2011
2004 Volvo V40 1.9L No Start, Stall, Misfire, MIL Lamp on VIN: YV1VW27534
P0304: Cyl 4 misfire. ... with complaint of extended crank time and check engine light when stared after 2 or more hours.We have noted a start and stall and then restartes with very rough idle. After just a couple minutes it clears up and runs perfect. Has set p0304 during this per...
April 17, 2011
2006 Ford F-250 Super Duty XL 5.4L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 1FTSX21506
P0304: Fault Cylinder 4 Misfire Detected. This vehicle came in running rough with these codes.Figured few coils would fix 3&4. Thought had ticking noise on #1 bank. Pulled valve cover looking for broken valve spring and all is good with good compression. Truck misses instantly on start up, pops cy...
April 25, 2011
2001 Subaru Outback 2.5L Misfire VIN: 4S3BH66571
P0304: Cylinder 4 Misfire Detected. I need some ideas on this problem. This 4cyl.Outback has a intermittent #4 misfire.I've replaced spark plugs,ignition wire set and ignition coil with all OE parts,but the same problem.Since the misfire is so intermittent,I never could duplicate the problem whi...
April 28, 2011
2004 Isuzu Rodeo S 3.5L Misfire VIN: 1S2DM58Y14
P0304: Cylinder 4 Misfire Detected. Vehicle came in with #3 misfire. Diagnosed as bad #3 injector. Replaced inj. and it ran fine for about [...]. Came back with #4 misfire, also diagnosed as bad injector. On test drive after replace #4 inj. #5 started missing. Low line fuel pressure seems to be ...
April 29, 2011