Join Now
International Automotive Technicians Network

P0304 Diagnostic Trouble Code Discussion for January 2008

Cylinder 4 Misfire Detected


Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P0304
Help Request Posted
2004 Honda CR-V EX 2.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: JHLPD68484
P0304: Cylinder 4 Misfire Detected. ... light on. p0300, p0301, p0302,,,ect... replaced spark plugs due to mileage and used iridium style as required by manufacture. could not get rid of the mis no matter what we did. swapped coils, checked for vacuum leaks, changed plug type. long term fuel tri...
January 23, 2008
2000 Lincoln LS 3.9L Excessive Emissions, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1LNHM87A1Y
P0304: misfire 4 cylinder. the car runs rich bank #1,ltft -25 stft -13 bank #1 ltft+13 stft+5 bank #2.we removed the sparkplugs out of bank #1 all were black the plugs bank #2 look fine.the car misfires at ilde on #4 cylinder but when you drive it down the road it will fly and feels lik...
January 23, 2008
2004 Honda CR-V EX 2.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: JHLPD68484
P0304: Cylinder 4 Misfire Detected. ... light on. p0300, p0301, p0302,,,ect... replaced spark plugs due to mileage and used iridium style as required by manufacture. could not get rid of the mis no matter what we did. swapped coils, checked for vacuum leaks, changed plug type. long term fuel tri...
January 24, 2008
2008 Toyota Sequoia Limited 5.7L Surge, MIL Lamp on VIN: 5TDBY68A88
FELLOW TECHNICIANS PLEASE HELP. I BOUGHT MY WIFE A 2008 TOYOTA SEQUOIA LIMITED 4WD 12/21/2007. ON 1/18/2008, WHILE SHE WAS DRIVING THIS VECHILE IT WENT INTO APPARENT LIMP HOME MODE AT 30mph, WOULD NOT ACCELLERATE OVER 5mph. THE FOLLOWING LIGHTS WENT ON - 4WD L...
January 24, 2008
2005 Subaru Outback XT 2.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: 4S4BP68C15
P0304: Cylinder 4 Misfire Detected. ... rough idle. check codes. p0304b. searched tech bulletins. found bulletin for carbon tracking. pulled plugs and replaced. saw no problem with coil so switched it to another cylinder. after roadtest, rough idle returned. check freeze frame data (which tech s...
January 25, 2008
2002 Honda Accord EX 3.0L Excessive Emissions, Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: 1FGCG16532
P0304: Cylinder 4 Misfire Detected. Hello, this Honda has been at three other shops, no parts have been replaced but nothing has been fixed. The engine has a misfire on all cylinders, but mainly #2 and 4 when cold. As the vehicle reaches operating temp the misfire slowly goes away, until gone. I...
January 28, 2008
1999 Dodge Ram 1500 Truck 3.9L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1B7HC16X3X
P0304: Cylinder 4 Misfire Detected. This vehicle came to me for emissions failure. Had code for coil driver circuit. Replaced coil and code went away. While vehicle was here fuel pump died and replaced it. Went away for about a week and came back with all of these cylinder misfire codes. At an i...
January 29, 2008
2002 Honda Accord EX 3.0L Excessive Emissions, Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: 1FGCG16532
P0304: Cylinder 4 Misfire Detected. Hello, this Honda has been at three other shops, no parts have been replaced but nothing has been fixed. The engine has a misfire on all cylinders, but mainly #2 and 4 when cold. As the vehicle reaches operating temp the misfire slowly goes away, until gone. I...
January 29, 2008
2008 Toyota Sequoia Limited 5.7L Surge, MIL Lamp on VIN: 5TDBY68A88
FELLOW TECHNICIANS PLEASE HELP. I BOUGHT MY WIFE A 2008 TOYOTA SEQUOIA LIMITED 4WD 12/21/2007. ON 1/18/2008, WHILE SHE WAS DRIVING THIS VECHILE IT WENT INTO APPARENT LIMP HOME MODE AT 30mph, WOULD NOT ACCELLERATE OVER 5mph. THE FOLLOWING LIGHTS WENT ON - 4WD L...
January 30, 2008
1999 Dodge Neon R/T 2.0L MIL Lamp on VIN: 3B3ES47YXX
P0304: Cylinder 4 Misfire Detected. ... with code P0300. No misfire felt by myself or owner. Replaced worn out spark plugs & wires. Vehicle came back with check eng light illuminated & codes P0300 & P0304. Engine runs fine.EGR OK.Eng Vac at idle 19...
January 31, 2008
2004 Honda CR-V EX 2.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: JHLPD68484
P0304: Cylinder 4 Misfire Detected. ... light on. p0300, p0301, p0302,,,ect... replaced spark plugs due to mileage and used iridium style as required by manufacture. could not get rid of the mis no matter what we did. swapped coils, checked for vacuum leaks, changed plug type. long term fuel tri...
January 23, 2008
2000 Lincoln LS 3.9L Excessive Emissions, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1LNHM87A1Y
P0304: misfire 4 cylinder. the car runs rich bank #1,ltft -25 stft -13 bank #1 ltft+13 stft+5 bank #2.we removed the sparkplugs out of bank #1 all were black the plugs bank #2 look fine.the car misfires at ilde on #4 cylinder but when you drive it down the road it will fly and feels lik...
January 23, 2008
2004 Honda CR-V EX 2.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: JHLPD68484
P0304: Cylinder 4 Misfire Detected. ... light on. p0300, p0301, p0302,,,ect... replaced spark plugs due to mileage and used iridium style as required by manufacture. could not get rid of the mis no matter what we did. swapped coils, checked for vacuum leaks, changed plug type. long term fuel tri...
January 24, 2008
2008 Toyota Sequoia Limited 5.7L Surge, MIL Lamp on VIN: 5TDBY68A88
FELLOW TECHNICIANS PLEASE HELP. I BOUGHT MY WIFE A 2008 TOYOTA SEQUOIA LIMITED 4WD 12/21/2007. ON 1/18/2008, WHILE SHE WAS DRIVING THIS VECHILE IT WENT INTO APPARENT LIMP HOME MODE AT 30mph, WOULD NOT ACCELLERATE OVER 5mph. THE FOLLOWING LIGHTS WENT ON - 4WD L...
January 24, 2008
2005 Subaru Outback XT 2.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: 4S4BP68C15
P0304: Cylinder 4 Misfire Detected. ... rough idle. check codes. p0304b. searched tech bulletins. found bulletin for carbon tracking. pulled plugs and replaced. saw no problem with coil so switched it to another cylinder. after roadtest, rough idle returned. check freeze frame data (which tech s...
January 25, 2008
2002 Honda Accord EX 3.0L Excessive Emissions, Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: 1FGCG16532
P0304: Cylinder 4 Misfire Detected. Hello, this Honda has been at three other shops, no parts have been replaced but nothing has been fixed. The engine has a misfire on all cylinders, but mainly #2 and 4 when cold. As the vehicle reaches operating temp the misfire slowly goes away, until gone. I...
January 28, 2008
1999 Dodge Ram 1500 Truck 3.9L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1B7HC16X3X
P0304: Cylinder 4 Misfire Detected. This vehicle came to me for emissions failure. Had code for coil driver circuit. Replaced coil and code went away. While vehicle was here fuel pump died and replaced it. Went away for about a week and came back with all of these cylinder misfire codes. At an i...
January 29, 2008
2002 Honda Accord EX 3.0L Excessive Emissions, Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: 1FGCG16532
P0304: Cylinder 4 Misfire Detected. Hello, this Honda has been at three other shops, no parts have been replaced but nothing has been fixed. The engine has a misfire on all cylinders, but mainly #2 and 4 when cold. As the vehicle reaches operating temp the misfire slowly goes away, until gone. I...
January 29, 2008
2008 Toyota Sequoia Limited 5.7L Surge, MIL Lamp on VIN: 5TDBY68A88
FELLOW TECHNICIANS PLEASE HELP. I BOUGHT MY WIFE A 2008 TOYOTA SEQUOIA LIMITED 4WD 12/21/2007. ON 1/18/2008, WHILE SHE WAS DRIVING THIS VECHILE IT WENT INTO APPARENT LIMP HOME MODE AT 30mph, WOULD NOT ACCELLERATE OVER 5mph. THE FOLLOWING LIGHTS WENT ON - 4WD L...
January 30, 2008
1999 Dodge Neon R/T 2.0L MIL Lamp on VIN: 3B3ES47YXX
P0304: Cylinder 4 Misfire Detected. ... with code P0300. No misfire felt by myself or owner. Replaced worn out spark plugs & wires. Vehicle came back with check eng light illuminated & codes P0300 & P0304. Engine runs fine.EGR OK.Eng Vac at idle 19...
January 31, 2008