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P0304 Diagnostic Trouble Code Discussion for October 2008

Cylinder 4 Misfire Detected


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Trouble Ticket Help Requests for DTC P0304
Help Request Posted
1999 Honda Accord EX 3.0L Stall, Misfire, MIL Lamp on VIN: 1HGCG225XX
P0304: Cylinder 4 Misfire Detected. Vehicle has all cylinders misfiring randomly ICM checks ok,coil ok, all power and grounds good,
October 01, 2008
2000 Chevrolet Express 2500 4.3L Misfire, MIL Lamp on, only at idle to 1800 VIN: 1GCFG25W8Y
P0304: Cylinder 4 Misfire Detected. compression 140 psi on cyl #4 injector balance test equal on all cyls. starts at 68 psi drops to 45 psi missing at idle upto 1800 rpms then stops on misfire counter vacuum gauge at idle is 18 ins. and not bouncing.
October 02, 2008
1999 Honda Accord EX 3.0L Stall, Misfire, MIL Lamp on VIN: 1HGCG225XX
P0304: Cylinder 4 Misfire Detected. Vehicle has all cylinders misfiring randomly ICM checks ok,coil ok, all power and grounds good,
October 02, 2008
2005 Kia Optima LX 2.4L No Start, Stall, MIL Lamp on VIN: KNAGD12625
P0304: Cylinder 4 Misfire Detected. ... and timing belt. After a week the customer brought it back for a stalling then no start prob. I found the dtc P0335 and found the cam sensor and connector bad. I repaired the connector and replaced the cam sensor. Intermitt...
October 06, 2008
1999 Saturn SC1 1.9L Excessive Emissions, Poor Fuel Economy VIN: 1G8ZF1284X
P0304: Cylinder 4 Misfire Detected. car came in ses light on po172/po304 misfire is not all the time stft was around 116 ltft 108 wont change.plugs are black with soot.is running rich. checked coolant temp with raytec is within 3 deg of temp.cleaned throttle plate and reset system(batt disconnec...
October 13, 2008
2001 Acura TL 3.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 19UUA566X1
P0304: Cylinder 4 Misfire Detected. ... approximately 1500 rpm and higher. With codes p0301 po303 p0304 p0306. While at Idle it is just slightly shaky and its not really noticeable without watching the counter or the MIL turning on. But ...
October 16, 2008
1999 Honda Accord EX 2.3L Poor Idle Quality VIN: 1HGCG65851
P0304: Cylinder 4 Misfire Detected. Hello all and thanks in advances for reading this this car is running badly on cold starts only, let it run for abit and it smoothes right out. When its running badly my vacume gauge is at 10" and needle is bouncing around like a valve issue. You can see c...
October 16, 2008
1997 Mercedes-Benz E420 4.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: WDBJF72F2V
P0304: misfire cyl 4. without a star machine im alittle perplexed. cyliders misfire on bank one only. when the vehicle arrived it had champion copper plugs in it. naturally i replaced them with bosch plats. scoped coils, no faults. scoped injectors, no faults. swapped coils and inj...
October 18, 2008
1996 Subaru Legacy L 2.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 4S3BD4350T
P0304: Cylinder 4 Misfire Detected. ... ONE OF YOU CAN HELP ME.AND THANK YOU BEFORE HAND ON THIS PROJECT!MY ROMEMATE BOUGHT THE CAR USED AND AFTER DRIVING IT A COUPLE OF DAY'S THE CHECK ENGINE LIGHT CAME ON. SCANED CAR WITH A BRAUN SCANER AND GOT CODE'S P0304 AND CODE P1101. CHECKED THE ING. WIR...
October 18, 2008
1999 Oldsmobile Alero GL 2.4L Misfire VIN: 1G3NL52T6X
P0304: Cylinder 4 Misfire Detected. Thanks in advance. This is one those problems . A quick run down, the cust came in months ago with a nostart, I spent hours on it and it had no spark,after much testing (coils module etc) I gave up and sent her to the dealer. and never heard from her again. No...
October 21, 2008
1999 Subaru Legacy L 2.5L Poor Idle Quality, Misfire VIN: 43SBG6850X
P0304: Cylinder 4 Misfire Detected. ... at stops. I noted engine running very rough at idle skipping while driving. retrieved dtc p0304 cylinder 4 misfire found #4 spark plug badly worn. others in need of replacment. replaced plugs and wires. still skipping. same dtc. cyl 4 misfire. swapped coil...
October 24, 2008
2002 Ford E-250 Econoline 5.4L Misfire, MIL Lamp on, NO POWER CAT CLEAN VIN: 1FTNE24L62
P0304: missfire. problem was light to med. missfires on acelaration.with codes.plugs, and related coils were replaced. fuel filter was plugged. after repair due to time, found fuel press.not per. spec.and not holding.press.is going too high[over55-70plus]. have done press. reg...
October 27, 2008