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P0304 Diagnostic Trouble Code Discussion for February 2007

Cylinder 4 Misfire Detected


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Trouble Ticket Help Requests for DTC P0304
Help Request Posted
1998 Ford Expedition Eddie Bauer 4.6L Misfire, MIL Lamp on VIN: 1FMEU1769W
P0304: misfire cyc4. We have this Expedition, with code 304 misfire cyc 4. Scan tool shows misfires in cyl. 4 and 8. We have installed new coil, checked wires, changed plugs to different cyl. to see if misfire moved to different cyclinder; also changed fuel injector to different c...
February 02, 2007
2004 Toyota Matrix 1.8L Misfire, MIL Lamp on VIN: 2T1KR32E14
P0304: Cylinder 4 Misfire Detected. Problem: Intermittently!! After cold sit for several hours engine starts with misfire occuring, MIL sets with all misfire codes. Mil stays on vehicle runs fine after arm up period. HAs just noticed on startup idles around 2000rpm cold and fluctuates up and dow...
February 05, 2007
1998 Honda Accord LX 2.3L Misfire, MIL Lamp on VIN: 1HGCG5548W
P0304: Cylinder 4 Misfire Detected. Hello all, I have a Honda here I'm having some trouble with. The check engine light goes on and off intermittently, setting the misfire codes listed below. While driving the vehicle, you feel no evidence of 3 cylinders misfiring? I replaced the plugs because o...
February 06, 2007
2003 Toyota Corolla CE 1.8L MIL Lamp on VIN: 1NXBR32E83
P0304: Cylinder 4 Misfire Detected. ... seemed like Toyota T.S.B. about these code fit my problem, Less than one week later they all came back. Freeze Frame data shows that P0300 happened while the vehicle was still cold. It seems like I have an intermittent misfir...
February 13, 2007
2004 Toyota Matrix 1.8L Misfire, MIL Lamp on VIN: 2T1KR32E14
P0304: Cylinder 4 Misfire Detected. Problem: Intermittently!! After cold sit for several hours engine starts with misfire occuring, MIL sets with all misfire codes. Mil stays on vehicle runs fine after arm up period. HAs just noticed on startup idles around 2000rpm cold and fluctuates up and dow...
February 13, 2007
1996 Ford Explorer Eddie Bauer 4.0L MIL Lamp on VIN: 1FMDU34X3T
P0304: Misfire cylinder 4. Vehicle came in with a knocking sound from engine and MIL on with Catalyst efficiency code. Knocking sound was the crankshaft dampner coming apart. Dealer part is on national backorder so we used a Dorman OEM. Now the vehicle has a flashing MIL and is counting...
February 15, 2007
2001 Mercury Sable LS Premium 3.0L Misfire VIN: 1MEHM55SX1
P0304: Cylinder 4 Misfire. This car has a intermittent miss. Cylinder #4 misfire. Changed plugs and wires. Removed coil pack and found a crack near cylinder #4 tower.Did a injection clean and upper intake clean. Saw alot of trouble with mas air flow sensors so I clean this one. Car went...
February 15, 2007
1997 Chevrolet Cavalier LS 2.2L Poor Idle Quality, Hesitation, Poor Fuel Economy, MIL Lamp on VIN: 1G1JF524XV
P0304: Cylinder 4 Misfire Detected. missfire jumps from cylinder to cylinder at random .number one cylinder on monday,number 4 cylinder on tuesday.missfire is only at idle,off idle missfire goes away.disconnect exhaust and missfire quality changes,almost goes away.
February 16, 2007
2002 Ford Explorer XLT 4.0L Cuts out, Misfire, MIL Lamp on VIN: 1FMDU73E42
P0304: misfire 4 cyl. hello techs!! need help. misfire #1-#4-#5 cyls, compression 160 -175 psi,replaced spark plugs (different types), vacuum @ idle 13, reved up went to 25" , when vacuum dropping the gauge jumps-ie 22-19-17-13 then stabilized at 13. pulled intake manifold (1 p...
February 16, 2007
2002 Ford Explorer XLT 4.0L Cuts out, Misfire, MIL Lamp on VIN: 1FMDU73E42
P0304: misfire 4 cyl. hello techs!! need help. misfire #1-#4-#5 cyls, compression 160 -175 psi,replaced spark plugs (different types), vacuum @ idle 13, reved up went to 25" , when vacuum dropping the gauge jumps-ie 22-19-17-13 then stabilized at 13. pulled intake manifold (1 p...
February 20, 2007
1997 Mitsubishi Galant ES 2.4L Misfire VIN: 4A3AJ56G6V
P0304: Cylinder 4 Misfire Detected. This vehicle has a misfire under load on no. four. There appears to be a weak spark out of cap for cylinder 4. Everything inside the distributor looks ok and the cap and rotor have been replaced. Has anyone else run into this. I am temted to put a distributor ...
February 23, 2007
1996 Ford Aerostar XLT 4.0L Misfire VIN: 1FMDA41X2T
P0304: mis4. ... miss monitor suspected of turning #4 injector off causeing p0304
February 27, 2007
2003 Isuzu Rodeo S V6 3.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 4S2DM58W83
P0304: Cylinder 4 Misfire Detected. ... replaced. Injector # 4 has proper resistence and is clicking while the vehicle is running. Code alternates between a P0300 and P0304. No other codes are present. When the vehicle is run at above 1500RPM the light flashes....
February 28, 2007
1998 Ford Expedition Eddie Bauer 4.6L Misfire, MIL Lamp on VIN: 1FMEU1769W
P0304: misfire cyc4. We have this Expedition, with code 304 misfire cyc 4. Scan tool shows misfires in cyl. 4 and 8. We have installed new coil, checked wires, changed plugs to different cyl. to see if misfire moved to different cyclinder; also changed fuel injector to different c...
February 02, 2007
2004 Toyota Matrix 1.8L Misfire, MIL Lamp on VIN: 2T1KR32E14
P0304: Cylinder 4 Misfire Detected. Problem: Intermittently!! After cold sit for several hours engine starts with misfire occuring, MIL sets with all misfire codes. Mil stays on vehicle runs fine after arm up period. HAs just noticed on startup idles around 2000rpm cold and fluctuates up and dow...
February 05, 2007
1998 Honda Accord LX 2.3L Misfire, MIL Lamp on VIN: 1HGCG5548W
P0304: Cylinder 4 Misfire Detected. Hello all, I have a Honda here I'm having some trouble with. The check engine light goes on and off intermittently, setting the misfire codes listed below. While driving the vehicle, you feel no evidence of 3 cylinders misfiring? I replaced the plugs because o...
February 06, 2007
2003 Toyota Corolla CE 1.8L MIL Lamp on VIN: 1NXBR32E83
P0304: Cylinder 4 Misfire Detected. ... seemed like Toyota T.S.B. about these code fit my problem, Less than one week later they all came back. Freeze Frame data shows that P0300 happened while the vehicle was still cold. It seems like I have an intermittent misfir...
February 13, 2007
2004 Toyota Matrix 1.8L Misfire, MIL Lamp on VIN: 2T1KR32E14
P0304: Cylinder 4 Misfire Detected. Problem: Intermittently!! After cold sit for several hours engine starts with misfire occuring, MIL sets with all misfire codes. Mil stays on vehicle runs fine after arm up period. HAs just noticed on startup idles around 2000rpm cold and fluctuates up and dow...
February 13, 2007
1996 Ford Explorer Eddie Bauer 4.0L MIL Lamp on VIN: 1FMDU34X3T
P0304: Misfire cylinder 4. Vehicle came in with a knocking sound from engine and MIL on with Catalyst efficiency code. Knocking sound was the crankshaft dampner coming apart. Dealer part is on national backorder so we used a Dorman OEM. Now the vehicle has a flashing MIL and is counting...
February 15, 2007
2001 Mercury Sable LS Premium 3.0L Misfire VIN: 1MEHM55SX1
P0304: Cylinder 4 Misfire. This car has a intermittent miss. Cylinder #4 misfire. Changed plugs and wires. Removed coil pack and found a crack near cylinder #4 tower.Did a injection clean and upper intake clean. Saw alot of trouble with mas air flow sensors so I clean this one. Car went...
February 15, 2007
1997 Chevrolet Cavalier LS 2.2L Poor Idle Quality, Hesitation, Poor Fuel Economy, MIL Lamp on VIN: 1G1JF524XV
P0304: Cylinder 4 Misfire Detected. missfire jumps from cylinder to cylinder at random .number one cylinder on monday,number 4 cylinder on tuesday.missfire is only at idle,off idle missfire goes away.disconnect exhaust and missfire quality changes,almost goes away.
February 16, 2007
2002 Ford Explorer XLT 4.0L Cuts out, Misfire, MIL Lamp on VIN: 1FMDU73E42
P0304: misfire 4 cyl. hello techs!! need help. misfire #1-#4-#5 cyls, compression 160 -175 psi,replaced spark plugs (different types), vacuum @ idle 13, reved up went to 25" , when vacuum dropping the gauge jumps-ie 22-19-17-13 then stabilized at 13. pulled intake manifold (1 p...
February 16, 2007
2002 Ford Explorer XLT 4.0L Cuts out, Misfire, MIL Lamp on VIN: 1FMDU73E42
P0304: misfire 4 cyl. hello techs!! need help. misfire #1-#4-#5 cyls, compression 160 -175 psi,replaced spark plugs (different types), vacuum @ idle 13, reved up went to 25" , when vacuum dropping the gauge jumps-ie 22-19-17-13 then stabilized at 13. pulled intake manifold (1 p...
February 20, 2007
1997 Mitsubishi Galant ES 2.4L Misfire VIN: 4A3AJ56G6V
P0304: Cylinder 4 Misfire Detected. This vehicle has a misfire under load on no. four. There appears to be a weak spark out of cap for cylinder 4. Everything inside the distributor looks ok and the cap and rotor have been replaced. Has anyone else run into this. I am temted to put a distributor ...
February 23, 2007
1996 Ford Aerostar XLT 4.0L Misfire VIN: 1FMDA41X2T
P0304: mis4. ... miss monitor suspected of turning #4 injector off causeing p0304
February 27, 2007
2003 Isuzu Rodeo S V6 3.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 4S2DM58W83
P0304: Cylinder 4 Misfire Detected. ... replaced. Injector # 4 has proper resistence and is clicking while the vehicle is running. Code alternates between a P0300 and P0304. No other codes are present. When the vehicle is run at above 1500RPM the light flashes....
February 28, 2007