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P0300 Diagnostic Trouble Code Discussion for April 2012

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
2000 Pontiac Montana 3.4L Misfire, all cylinders VIN: 1GMDX03E2Y
P0300: Multiple Cylinder Misfire Detected. this engine has a missfire during second gear and only trough second gear. all cylinders show missfire on the scanner no other codes. notice that when egr is unpluged engine runs good as long as theres a code for the egr no missfire. i plugged a mew egr on the...
April 03, 2012
2003 Toyota RAV4 2.0L Excessive Emissions, Misfire, MIL Lamp on VIN: JTEHH20V03
P0300: Multiple Cylinder Misfire Detected. Vehicle keeps going through ignition coils had first set of coils from standard ignition Others replaced at another shop from Napa Auto Parts. As a result of being driven with the misfire it has destroyed two catalytic convertors. Cant find the reason for the ...
April 03, 2012
2003 Chevrolet Venture LS 3.4L Misfire, MIL Lamp on VIN: 1GNDX03EX3
P0300: Multiple Cylinder Misfire Detected. I have a Chevy Venture that has a misfire at idle on mainly #3 cylinder and some on #4 cylinder. The misfire goes away at about 1200-1300 RPM in park and in gear the misfire will go away just off idle. Compression is all good. No bouncing engine vacuum. Inject...
April 09, 2012
2006 Ford Expedition King Ranch 5.4L Surge, Misfire VIN: 1FMFU18516
P0300: Random Misfire Detected. ... is eating my lunch and here's the history behind it. In about December it came in for an extended crank when warm problem. We narrowed the cause down to a leaking injector but the customer didn't want to do anything about it at that time. In March the inje...
April 09, 2012
2004 Audi S4 Avant 4.2L Misfire VIN: WAUPL68E54
P0300: Random Missfire. This car came in with intermittent misfires on cylinders 1, 2, 5, 7. It occasionally will act up for about 5 secs and it is only at start-up after sitting for a little while. The car exhibits no other issues when driving. Has anyone run into an issue like this...
April 10, 2012
2005 Volkswagen Jetta 2.5 2.5L Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: 3VWPF71K45
P0300: mult. missfires. ran propane around intake with no result.found diagham in valve cover ruptured and replaced-made idle better.but still has small pecks idling .running down road during normal accel will surge then after 2500 rpms runs fine long term fuel trim is + or - 3 or 5%...
April 11, 2012
2006 Chevrolet HHR LS 2.2L Poor Idle Quality, Surge, Misfire VIN: 3GNDA13D66
P0300: Random Misfire Detected. ... hard to start and runs rough intermittent. This morning it ran rough it had code p0300. It was racking up missfires on cylinders 2 and 3. We replaced the ignition module and it still ran rough. We have also replaced the coil and throttle body due to other ...
April 12, 2012
2003 Jaguar XJR 4.0L MIL Lamp on VIN: SAJDA15B33
P0300: Random misfire. Car presented with check engine light on due to lean codes for both banks/won't pass state inspection. I found and repaired a few vacuum leaks and the fuel trims improved a bit but lean codes returned. I then did an on-car injection flush. Again, some improvem...
April 15, 2012
2007 Dodge Durango Limited 4.7L Misfire VIN: 1D8HD58P47
P0300: Multiple Misfire Detected. Durango runs good and shift fine under normal driving condition.when i get on express way and try to pass car will shitf down check engine light start to flash and get missfire code and will not up shift untill i releas gas pedal note rps are at 4000 and will ...
April 16, 2012
2006 Chevrolet HHR LS 2.2L Poor Idle Quality, Surge, Misfire VIN: 3GNDA13D66
P0300: Random Misfire Detected. ... hard to start and runs rough intermittent. This morning it ran rough it had code p0300. It was racking up missfires on cylinders 2 and 3. We replaced the ignition module and it still ran rough. We have also replaced the coil and throttle body due to other ...
April 17, 2012
2003 Jaguar XJR 4.0L MIL Lamp on VIN: SAJDA15B33
P0300: Random misfire. Car presented with check engine light on due to lean codes for both banks/won't pass state inspection. I found and repaired a few vacuum leaks and the fuel trims improved a bit but lean codes returned. I then did an on-car injection flush. Again, some improvem...
April 18, 2012
2008 Dodge Ram 1500 Truck SXT 5.7L Misfire VIN: 1D7HA18298
P0300: Missfire. I had another request open and something happened and could not respond to it. The truck sometimes runs great until you accelerate little hard then cuts out, sometimes it does a random misfire at start up
April 19, 2012
1997 Dodge B2500 3.9L Hesitation, Stall, MIL Lamp on VIN: 2B6HB21X7V
P0300: Multiple Cylinder Misfire Detected. Van came in for misfire at times and dies out .Test drove runs pretty good but at times seems to cut out.Brake torque no problems will brak tires loose.Check mis fire counter on scan tool and can see cylinders misfire 1,2,3,4,5.Cylinders 1,3,5 are the worst.It...
April 20, 2012
1995 Ford Ranger Splash 4.0L Excessive Emissions, MIL Lamp on VIN: 1FTCR10X0S
P0300: Random misfire. ... Ranger, customer thought it was running fine, got his emission test, you can see the results. Freeze frame data for P0300 showed idle speed, B1 ST+LTFT -24%, B2 ST+LTFT +42%, engine temp 190d F. Checked ECT, MAF, fuel pr...
April 20, 2012
2003 Chevrolet Silverado 2500 HD 6.0L no acceleration VIN: 1GCHK29U53
P0300: Multiple Engine Misfire Detected. Very intermittent. Truck looses power while driving. Can put pedal to floor and does not accelerate. shut off for a few minutes and runs great till next time. could be as long as 2-3 months.Seems like throttle body issue, but have read many sites where techs r...
April 23, 2012
2004 Toyota Sienna CE 3.3L Hesitation, Misfire VIN: 5TDZA29C44
P0300: Multiple Cylinder Misfire Detected. Vehicle is giving me a little grief. It has a code for the B2S2, and the vehicle missing on bank 1 all cylinders. Checked fuel pressure and timing as well I replaced the bank 1, plugs seeing the customer was after replacing the converter and it now has a missf...
April 23, 2012
2008 Hyundai Santa Fe GLS 2.7L Misfire, MIL Lamp on VIN: 5NMSG13D38
P0300: random misfire. Hello fellow Techs, This Hyundia came in running poorly misfire under hard accel or under load uphill. Seems to be worse the more its driven. Customer replaced all plugs and coils - dealer replaced all cats. I felt after road test it had a timing problem - I ...
April 24, 2012
2001 Chevrolet Silverado 1500 4.3L Misfire VIN: 1GCEC14W41
P0300: Multiple Cylinder Misfire Detected. All cyls showintermittant misfire, very low count. #4 is the only one that will misfire when hard accel, downshift,rpms over 4000, trans upshifts then #4 begins to misfire and will continue until decel and reapply throttle, misfire stops. We can duplicate ever...
April 25, 2012
1997 Dodge B2500 3.9L Hesitation, Stall, MIL Lamp on VIN: 2B6HB21X7V
P0300: Multiple Cylinder Misfire Detected. Van came in for misfire at times and dies out .Test drove runs pretty good but at times seems to cut out.Brake torque no problems will brak tires loose.Check mis fire counter on scan tool and can see cylinders misfire 1,2,3,4,5.Cylinders 1,3,5 are the worst.It...
April 26, 2012
2005 Kia Rio 1.6L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire, MIL Lamp on VIN: KNADC12505
P0300: Random Cylinder Misfire Detected. i have this car, when you revers it gose about 100 yards then stall,but going forward you can go more then a foot and it stalls, when it first came in i had all all four injector cicuit low codes and all four cylinder misfires, cleard codes, now i only have th...
April 26, 2012
2004 Toyota Sienna CE 3.3L Hesitation, Misfire VIN: 5TDZA29C44
P0300: Multiple Cylinder Misfire Detected. Vehicle is giving me a little grief. It has a code for the B2S2, and the vehicle missing on bank 1 all cylinders. Checked fuel pressure and timing as well I replaced the bank 1, plugs seeing the customer was after replacing the converter and it now has a missf...
April 26, 2012
1996 Volvo 850 GLT 2.4L Poor Idle Quality, Misfire VIN: YV1LS5542T
P0300: random misfire. Hellow all volvo techs any help or insight would be appriciated. This volvo has got me at the end of my ideas I have replaced plugs wires cap rotor with oe parts tried diffrent maf crank sensor have checked compression and did injector balance test and still n...
April 27, 2012
2001 Chevrolet S10 4.3L Misfire, MIL Lamp on VIN: 1GCDT19W91
P0300: Multiple Engine Misfire Detected. This truck has engine miss on cylinder 1, this is the only cylinder that shows to be misfiring. It has good compression, good fuel pressure (65 psi), good spark and the injector waveform looks fine. I can't figure it out. Has anyone out there run into this be...
April 30, 2012
2006 Chevrolet HHR LS 2.2L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 3GNDA13D66
P0300: Random Misfire Detected. This thing is driving me crazy.I think its the computer but Im not convinced.This thing will misfire on cyls,1-4 and next time it is 2-3.Heres the crazy part.When you start it and it doesnt matter hot or cold,if it misses it wont stop till you shut off and res...
April 30, 2012
2000 Pontiac Montana 3.4L Misfire, all cylinders VIN: 1GMDX03E2Y
P0300: Multiple Cylinder Misfire Detected. this engine has a missfire during second gear and only trough second gear. all cylinders show missfire on the scanner no other codes. notice that when egr is unpluged engine runs good as long as theres a code for the egr no missfire. i plugged a mew egr on the...
April 03, 2012
2003 Toyota RAV4 2.0L Excessive Emissions, Misfire, MIL Lamp on VIN: JTEHH20V03
P0300: Multiple Cylinder Misfire Detected. Vehicle keeps going through ignition coils had first set of coils from standard ignition Others replaced at another shop from Napa Auto Parts. As a result of being driven with the misfire it has destroyed two catalytic convertors. Cant find the reason for the ...
April 03, 2012
2003 Chevrolet Venture LS 3.4L Misfire, MIL Lamp on VIN: 1GNDX03EX3
P0300: Multiple Cylinder Misfire Detected. I have a Chevy Venture that has a misfire at idle on mainly #3 cylinder and some on #4 cylinder. The misfire goes away at about 1200-1300 RPM in park and in gear the misfire will go away just off idle. Compression is all good. No bouncing engine vacuum. Inject...
April 09, 2012
2006 Ford Expedition King Ranch 5.4L Surge, Misfire VIN: 1FMFU18516
P0300: Random Misfire Detected. ... is eating my lunch and here's the history behind it. In about December it came in for an extended crank when warm problem. We narrowed the cause down to a leaking injector but the customer didn't want to do anything about it at that time. In March the inje...
April 09, 2012
2004 Audi S4 Avant 4.2L Misfire VIN: WAUPL68E54
P0300: Random Missfire. This car came in with intermittent misfires on cylinders 1, 2, 5, 7. It occasionally will act up for about 5 secs and it is only at start-up after sitting for a little while. The car exhibits no other issues when driving. Has anyone run into an issue like this...
April 10, 2012
2005 Volkswagen Jetta 2.5 2.5L Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: 3VWPF71K45
P0300: mult. missfires. ran propane around intake with no result.found diagham in valve cover ruptured and replaced-made idle better.but still has small pecks idling .running down road during normal accel will surge then after 2500 rpms runs fine long term fuel trim is + or - 3 or 5%...
April 11, 2012
2006 Chevrolet HHR LS 2.2L Poor Idle Quality, Surge, Misfire VIN: 3GNDA13D66
P0300: Random Misfire Detected. ... hard to start and runs rough intermittent. This morning it ran rough it had code p0300. It was racking up missfires on cylinders 2 and 3. We replaced the ignition module and it still ran rough. We have also replaced the coil and throttle body due to other ...
April 12, 2012
2003 Jaguar XJR 4.0L MIL Lamp on VIN: SAJDA15B33
P0300: Random misfire. Car presented with check engine light on due to lean codes for both banks/won't pass state inspection. I found and repaired a few vacuum leaks and the fuel trims improved a bit but lean codes returned. I then did an on-car injection flush. Again, some improvem...
April 15, 2012
2007 Dodge Durango Limited 4.7L Misfire VIN: 1D8HD58P47
P0300: Multiple Misfire Detected. Durango runs good and shift fine under normal driving condition.when i get on express way and try to pass car will shitf down check engine light start to flash and get missfire code and will not up shift untill i releas gas pedal note rps are at 4000 and will ...
April 16, 2012
2006 Chevrolet HHR LS 2.2L Poor Idle Quality, Surge, Misfire VIN: 3GNDA13D66
P0300: Random Misfire Detected. ... hard to start and runs rough intermittent. This morning it ran rough it had code p0300. It was racking up missfires on cylinders 2 and 3. We replaced the ignition module and it still ran rough. We have also replaced the coil and throttle body due to other ...
April 17, 2012
2003 Jaguar XJR 4.0L MIL Lamp on VIN: SAJDA15B33
P0300: Random misfire. Car presented with check engine light on due to lean codes for both banks/won't pass state inspection. I found and repaired a few vacuum leaks and the fuel trims improved a bit but lean codes returned. I then did an on-car injection flush. Again, some improvem...
April 18, 2012
2008 Dodge Ram 1500 Truck SXT 5.7L Misfire VIN: 1D7HA18298
P0300: Missfire. I had another request open and something happened and could not respond to it. The truck sometimes runs great until you accelerate little hard then cuts out, sometimes it does a random misfire at start up
April 19, 2012
1997 Dodge B2500 3.9L Hesitation, Stall, MIL Lamp on VIN: 2B6HB21X7V
P0300: Multiple Cylinder Misfire Detected. Van came in for misfire at times and dies out .Test drove runs pretty good but at times seems to cut out.Brake torque no problems will brak tires loose.Check mis fire counter on scan tool and can see cylinders misfire 1,2,3,4,5.Cylinders 1,3,5 are the worst.It...
April 20, 2012
1995 Ford Ranger Splash 4.0L Excessive Emissions, MIL Lamp on VIN: 1FTCR10X0S
P0300: Random misfire. ... Ranger, customer thought it was running fine, got his emission test, you can see the results. Freeze frame data for P0300 showed idle speed, B1 ST+LTFT -24%, B2 ST+LTFT +42%, engine temp 190d F. Checked ECT, MAF, fuel pr...
April 20, 2012
2003 Chevrolet Silverado 2500 HD 6.0L no acceleration VIN: 1GCHK29U53
P0300: Multiple Engine Misfire Detected. Very intermittent. Truck looses power while driving. Can put pedal to floor and does not accelerate. shut off for a few minutes and runs great till next time. could be as long as 2-3 months.Seems like throttle body issue, but have read many sites where techs r...
April 23, 2012
2004 Toyota Sienna CE 3.3L Hesitation, Misfire VIN: 5TDZA29C44
P0300: Multiple Cylinder Misfire Detected. Vehicle is giving me a little grief. It has a code for the B2S2, and the vehicle missing on bank 1 all cylinders. Checked fuel pressure and timing as well I replaced the bank 1, plugs seeing the customer was after replacing the converter and it now has a missf...
April 23, 2012
2008 Hyundai Santa Fe GLS 2.7L Misfire, MIL Lamp on VIN: 5NMSG13D38
P0300: random misfire. Hello fellow Techs, This Hyundia came in running poorly misfire under hard accel or under load uphill. Seems to be worse the more its driven. Customer replaced all plugs and coils - dealer replaced all cats. I felt after road test it had a timing problem - I ...
April 24, 2012
2001 Chevrolet Silverado 1500 4.3L Misfire VIN: 1GCEC14W41
P0300: Multiple Cylinder Misfire Detected. All cyls showintermittant misfire, very low count. #4 is the only one that will misfire when hard accel, downshift,rpms over 4000, trans upshifts then #4 begins to misfire and will continue until decel and reapply throttle, misfire stops. We can duplicate ever...
April 25, 2012
1997 Dodge B2500 3.9L Hesitation, Stall, MIL Lamp on VIN: 2B6HB21X7V
P0300: Multiple Cylinder Misfire Detected. Van came in for misfire at times and dies out .Test drove runs pretty good but at times seems to cut out.Brake torque no problems will brak tires loose.Check mis fire counter on scan tool and can see cylinders misfire 1,2,3,4,5.Cylinders 1,3,5 are the worst.It...
April 26, 2012
2005 Kia Rio 1.6L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire, MIL Lamp on VIN: KNADC12505
P0300: Random Cylinder Misfire Detected. i have this car, when you revers it gose about 100 yards then stall,but going forward you can go more then a foot and it stalls, when it first came in i had all all four injector cicuit low codes and all four cylinder misfires, cleard codes, now i only have th...
April 26, 2012
2004 Toyota Sienna CE 3.3L Hesitation, Misfire VIN: 5TDZA29C44
P0300: Multiple Cylinder Misfire Detected. Vehicle is giving me a little grief. It has a code for the B2S2, and the vehicle missing on bank 1 all cylinders. Checked fuel pressure and timing as well I replaced the bank 1, plugs seeing the customer was after replacing the converter and it now has a missf...
April 26, 2012
1996 Volvo 850 GLT 2.4L Poor Idle Quality, Misfire VIN: YV1LS5542T
P0300: random misfire. Hellow all volvo techs any help or insight would be appriciated. This volvo has got me at the end of my ideas I have replaced plugs wires cap rotor with oe parts tried diffrent maf crank sensor have checked compression and did injector balance test and still n...
April 27, 2012
2001 Chevrolet S10 4.3L Misfire, MIL Lamp on VIN: 1GCDT19W91
P0300: Multiple Engine Misfire Detected. This truck has engine miss on cylinder 1, this is the only cylinder that shows to be misfiring. It has good compression, good fuel pressure (65 psi), good spark and the injector waveform looks fine. I can't figure it out. Has anyone out there run into this be...
April 30, 2012
2006 Chevrolet HHR LS 2.2L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 3GNDA13D66
P0300: Random Misfire Detected. This thing is driving me crazy.I think its the computer but Im not convinced.This thing will misfire on cyls,1-4 and next time it is 2-3.Heres the crazy part.When you start it and it doesnt matter hot or cold,if it misses it wont stop till you shut off and res...
April 30, 2012