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P0304 Diagnostic Trouble Code Discussion for August 2012

Cylinder 4 Misfire Detected

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Trouble Ticket Help Requests for DTC P0304
Help Request Posted
1999 Audi A4 1.8L No Start, Hesitation, Stall, Misfire VIN: WAUCB28D0X
P0304: testing and results. head scratcher.. 1999 audi 1.8 turbo.when sits overnight veh wont always start, when car starts runs rough. if throttle is touched car will die and loose compression to all cylinder. wait 5 min and will come back usualy running rough and will smooth out if lef...
August 01, 2012
2001 Ford Mustang GT 4.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FAFP45X41
P0304: . This mustang came to me from another shop. They had just finished installing a reman engine now it runs terrible! Engine barely idles pops out the exhaust and intake at random. I never drove it, it runs to poorly. Started unplugging coils while running and fou...
August 06, 2012
2006 Honda CR-V EX 2.4L Misfire, MIL Lamp on VIN: JHLRD68866
P0304: Cylinder 4 Misfire Detected. ... P0300, P0302, P0303 and P0304 codes. I replaced the plugs. The display parameters all looked OK. The trims were OK. The Lambda figure stayed close to 1.0. The MAP sensor read as expected. It did show up to 12 degrees of knock retard. Adding premium fuel pe...
August 06, 2012
2005 GMC Envoy XUV SLT 5.3L Misfire VIN: 1GKES12M75
P0304: Misfire 4. Vehicle came in Mon. morning with engine tick, found collapsed lifter on #4.No Compression on #4. Replaced both new (lifters) on cylinder #4. Keep in mind it is a Displacement on demand(DOD) type system.#4 lifters are that type(DOD). We installed a new GM Oil ...
August 17, 2012
2001 Ford Expedition XLT 5.4L Misfire
P0304: . I've worked on a lot of these , but this one has me beat, Truck came in with a coolant leak and a miss on #2, The miss was coil on #2 the leak was the intake. I fixed both and the truck ran fine. A day later I got a call back, the truck was missing again. This...
August 23, 2012
2007 Ford F-150 XLT 5.4L Poor Idle Quality, Hesitation, Misfire VIN: 1FTPW14V07
P0304: misfire 4 cyl. mis on #4,compresion 175,switched coils,switched injectors,scoped coil & injector)OK,smoke tested intake for leaks)OK,etsted with oxy/acc for leaks in intake)ok,fuel trim slightly negative on bank 1short term at idle),po304 after long drive;does not always...
August 23, 2012
2001 Lexus RX300 3.0L MIL Lamp on VIN: JTJGF10U31
P0304: Cylinder 4 misfire. Vehicle was brought in for MIL. Pulled codes and found the ones that were listed (300, 302, 304 and 306). I noticed the fuel trims are all high until the vehicle warms up and then they all go normal except short term on bank 2 which stays at around 10% and d...
August 29, 2012