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P0300 Diagnostic Trouble Code Discussion for February 2006

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
2003 Chevrolet Express 3500 6.0L Misfire VIN: 1GCHG35U23
P0300: Multiple Cylinder Misfire Detected. Thanks in advance to all that reply to my situation. Kind of puzzled here, though i could find mis by switching components...no help still has mis on cylinders 2 and 6. Cylinder counter shows more misses than 6. I'm thinking a leaking intake or possible low co...
February 02, 2006
2000 GMC Sierra 1500 SL 5.3L Misfire, MIL Lamp on VIN: 1GTEC19T3Y
P0300: Multiple Cylinder Misfire Detected. This pickup has random misfire on right bank only-mostly cylinder #6. Swapped #6 coil with #3-same result. Ignition system checks ok. Remove fuel rail & checked for moisture or debris-ok. Fuel pressure & filter are both fine, EGR & IAC check out fi...
February 02, 2006
1997 Toyota RAV4 2.0L MIL Lamp on VIN: JT3HP10VOV
P0300: Multiple Cylinder Misfire Detected. Vehicle came in with ses light on and no drivability complaints.Code was po300 random misfire detected. road test and checked for misfires and all checked ok. Sold customer 120K service with a major tune up including plugs, wires, cap, rotor, air and fuel filt...
February 02, 2006
2004 Chevrolet Express 2500 4.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GCGG25V24
P0300: Multiple Cylinder Misfire Detected. ... po200 and po300 codes. found cyl # 2 misfires at 150,000 in history and current counter climbing. backprobing at pcm found no injector driver circuit. replaced pcm with ac delco reman and shipped it running great.flash forward to yesterday , van is back , ...
February 03, 2006
2000 Honda CR-V EX 2.0L Misfire, MIL Lamp on VIN: JHLRD1767Y
P0300: Multiple Misfire Detected. ... codes for misfire #1 & #3. Replaced worn out plugs, cap rotor and wires, car came back 300 miles later with coed P0301 mis fire #1, scoped ignition pattern and it looked perfect, let car idle 5 min and MIL came back on again. replaced spark plug just f...
February 03, 2006
1997 Ford Explorer XL 4.0L Poor Idle Quality, Stall, MIL Lamp on
P0300: random misfire. ... these and allready did them. No change at all. has the famous lean codes P0171 and P0174, along with misfire codes. long term fuel trim on bank 2 is 25 long term on bank 1 is -5 its got to be injectors, that's what I am think...
February 07, 2006
2002 GMC Sierra 1500 SL 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GTEK14T12
P0300: Multiple Cylinder Misfire Detected. I have multiple random cylinder missfires occuring mostly when cold. Fuel pressure is 48psi with koer,53psi with koeo, and 58 psi koer with vac line removed from regulator. My spec shows that fuel pressure needs to be 56-62 but does not state with koer, koeo, ...
February 07, 2006
2002 Mercedes-Benz C240 2.6L Misfire, MIL Lamp on VIN: WDBRF61J92
P0300: Multiple Misfire. I Have a problem with cylinder 3 dead misfire. First when you start the car it will run good for about 10-15 seconds then starts mising, constant dead misfire.Good fuel pressure, we switched the injector, ignition coil, wires, sparkplugs form the working cylin...
February 07, 2006
1997 Chevrolet Cavalier 2.2L Misfire, MIL Lamp on VIN: 1G1JC124XV
P0300: Multiple Engine Misfire Detected. Hey GM Tech's. I have this 1997 cavalier that doesn't want to go away. Vehicle origionally came in for a raw fuel smell or fuel leak. Upon checking, found #2 injector wiring connector with fuel coming out of it. Thought would be an easy Fix. Installed new fue...
February 08, 2006
2001 Chevrolet Silverado 1500 5.3L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1GCEK14T81
P0300: Multiple Cylinder Misfire Detected. Truck came in with code P0140 changed b1s2 o2 sensor. came back soon after with codes as above. Checked cat converter for pluged Clean and Clear, could not find vacuum leak at intake with carb clean. Plugs all look good. Missfire monitor 1,3,5,7. Sometimes idl...
February 08, 2006
2002 Ford F-150 XL 4.2L Excessive Emissions, Misfire, MIL Lamp on VIN: 1FTRX17292
P0300: random misfire. Customer came in just wanting a maintenance tune-up, with a complaint of a possible wire breaking down. Installed a new set of plugs and test drove. After this, vehicle had a misfire, which was confirmed with the scanner. pulled the plugs out on cyls 4, 5, and...
February 08, 2006
2000 Saturn LS2 3.0L Misfire, MIL Lamp on VIN: 1G8JW52R7Y
P0300: Random Misfire Detected. ... came in with 2 codes (P0300 & P0304). First thing my tech did was look at missfire data, on our Snap-On MODUS, and noticed cylinder #2 was slowly counting a missfire, but the car was definitly not missfiring. He removed...
February 08, 2006
1997 Chevrolet Cavalier 2.2L Misfire, MIL Lamp on VIN: 1G1JC124XV
P0300: Multiple Engine Misfire Detected. Hey GM Tech's. I have this 1997 cavalier that doesn't want to go away. Vehicle origionally came in for a raw fuel smell or fuel leak. Upon checking, found #2 injector wiring connector with fuel coming out of it. Thought would be an easy Fix. Installed new fue...
February 09, 2006
2002 Mitsubishi Montero XLS 3.5L MIL Lamp on VIN: JA4MW31R82
P0300: Random Misfire Detected. ... days then the( CEL) LIGHT WILL APPEAR with no driveability concerns. will scan and still get same code p0300 random missfire.
February 09, 2006
2004 Chevrolet Aveo 1.6L Misfire VIN: KL1TD62604
P0300: Engine Misfire Detected. Vehicle developes an intermintent miss usually after returning to idle. Customer had spark plugs replaced before bring the car to us. The car will run fine at higher rpm's and develope a miss upon returning to idle. After returning to idle the car will smooth ...
February 10, 2006
1999 Chevrolet S10 2.2L Misfire VIN: 1GCCS144XX
P0300: Multiple Engine Misfire Detected. consistently , at 2,000 rpm up to 2,500 5th gear 80%load throttle varying between 1/2 to 3/4 multiple misfire on cyl. 1. scan data on 4 graph, (modis)confirms misfire.no other sensors are indicating changes during misfire. current ramping tests on injector cir...
February 11, 2006
2002 Honda Odyssey EX 3.5L Poor Idle Quality, Misfire, MIL Lamp on
P0300: Multiple Misfire Detected. Does anyone know what the fuel pressure really should be on this thing?? It was checked at the quick disconnect near the fuel tank, not at the rail, there is no place to check at the rail, alldata says to check with special tool, of course, at the fuel pulse d...
February 12, 2006
1998 Ford Crown Victoria 4.6L Poor Idle Quality, Surge, Stall, Misfire, MIL Lamp on VIN: 2FAFP73W9W
P0300: random misfire. this crown vic seems to have no problem starting but immediately after start up it runs like a pile crap.it feels like it is misfiring on at least one cylinder it also seems to surge at the same time.the problem with this condition is it only lasts about 45 se...
February 14, 2006
2002 Chevrolet Silverado 3500 6.0L Misfire VIN: 1GBJC34U22
P0300: Multiple Cylinder Misfire Detected. gm techs help, this 1 ton has a main fuel tank and a aux. fuel tank. aux tank fuel pump never comes on to pump fuel into main tank. found fuel pump relay for main tank but not for aux. tank. owners manual shows a upfitter relay located in a center of dash fuse...
February 15, 2006
1998 Pontiac Grand Prix GTP 3.8L Misfire, MIL Lamp on VIN: 1G2WP5216W
P0300: Multiple Engine Misfire Detected. ... boost comes in. Feels like loss of fuel. Both O2 sensors read the same. No misfire in cyllinders #2 and #6. #4 and #5 miss the worst. Runs perfect unless under load. New spark plugs, fuel filter, air filter. P0300, multiple cyllinder misfire, is the only c...
February 18, 2006
2000 Mercedes-Benz ML320 3.2L Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 4JGAB54E8Y
P0300: testing and results. Hello guy's I hope you can help me on this one. Begining to look like a problem child and want to get some input before I get too deep. This car used car dealer vehicle so no repair history is available. vehicle came in with complaint of cold hesitation and mi...
February 19, 2006
1998 Toyota Corolla CE 1.8L Misfire, MIL Lamp on VIN: 1NXBR12EXW
P0300: Multiple Cylinder Misfire Detected. A mind boggling misfire here. It feels like a power loss between 2200 and 3000 rpm at 70 to 80% load. Never before 2200 rpm and it picks up and runs great after 3000 rpm. It does not feel like a dead miss, however the misfire counter on cyl #1 starts climbing ...
February 21, 2006
1997 Toyota Camry CE 2.2L Hesitation, Surge VIN: 4T1BG22K5V
P0300: Multiple Cylinder Misfire Detected. car came in check engine light on and hesitating. found random missfire code. had old tune up stuff. replaced wires, fuel filter, spark plugs (toyota ones), pcv. car still hesistates on snap accel. gradual accel ok. fuel pressure is 50 psi. disconnected egr sa...
February 24, 2006
2000 Toyota Echo 1.5L Misfire, MIL Lamp on VIN: JTDBT1230Y
P0300: Multiple Cylinder Misfire Detected. Hello to all, I have a 2000 toyota Echo with a 1.5 liter that has a miss when rounding corners. I have no way of checking fuel pressure on this system, need different adapters that my fuel kit does not have, and I believe vechile is momentarily "running ou...
February 24, 2006
2001 Chevrolet Express 2500 4.3L hard start VIN: 1GCFG25W51
P0300: Multiple Cylinder Misfire Detected. Hey guys, the main complaint is hard starting. I verified this and the engine does not crank smoothly. When cranking and a cylinder fires, the engine jerks to a stop momentarity as if the firing is out of order, just like an engine trying to start with the plu...
February 27, 2006
1999 Buick Regal GS 3.8L Misfire, Excessive plug wear VIN: 2G4WF5214X
P0300: Engine Misfire Detected. What I have here is a 3.8 supercharged with no running problems inidicated when driving until plug tip is burnt off, then will start misfiring. What I have found out is that the plugs were replaced once (500 miles ago) prior to coming to me with a new mass air...
February 28, 2006
1996 Chevrolet S10 4.3L Hesitation VIN: IGCCS14X5T
P0300: Multiple Engine Misfire Detected. Cleared codes and non have retured while test driving. Thought problem might just be related to fuel pump as this is so common on this motor, CPI, lots of posts with my problems fixed by FP replacement. Truck feels like it has a slight miss while going down th...
February 28, 2006
1997 Chevrolet Cavalier LS 2.4L Misfire VIN: 4G1JF32T1V
P0300: Multiple Engine Misfire Detected. Here's the deal customer brought us this 97 cavalier they had just purchased. It was running bad and check engine light was on. I scanned it to find the above codes... first thing I found was a broken vacuum hose to the MAP sensor. I repaired it cleared the co...
February 28, 2006
2001 Mercedes-Benz ML320 3.2L Hesitation, Misfire, MIL Lamp on VIN: 4JGAB54E41
P0300: multiple miss fire. FELLOW TECHS THIS ML 320 IS GIVING ME A PROBLEM,ITS GIVING ME A CYL #3 AND #6 MISSFIRE CODE SOME TIMES #4. ON A REGULAR TEST DRIVE ITS FINE I DROVE IT FOR A HALF HOUR NO PROBLEM NO CODES. I NOTICED THAT IT WOULD ACT UP ONLY WHEN I PUSHED IT HARD AND THE TACH ...
February 28, 2006
1996 Pontiac Grand Am SE 3.1L Surge, Misfire VIN: 1G2NMW12M7
P0300: Multiple Cylinder Misfire Detected. Bad intermittent miss fire. Most on cyl #5. Has a bad surge Idle up and down. No vac leak can be found. We have heard this could be a cam sensor problem?
February 28, 2006
2003 Chevrolet Express 3500 6.0L Misfire VIN: 1GCHG35U23
P0300: Multiple Cylinder Misfire Detected. Thanks in advance to all that reply to my situation. Kind of puzzled here, though i could find mis by switching components...no help still has mis on cylinders 2 and 6. Cylinder counter shows more misses than 6. I'm thinking a leaking intake or possible low co...
February 02, 2006
2000 GMC Sierra 1500 SL 5.3L Misfire, MIL Lamp on VIN: 1GTEC19T3Y
P0300: Multiple Cylinder Misfire Detected. This pickup has random misfire on right bank only-mostly cylinder #6. Swapped #6 coil with #3-same result. Ignition system checks ok. Remove fuel rail & checked for moisture or debris-ok. Fuel pressure & filter are both fine, EGR & IAC check out fi...
February 02, 2006
1997 Toyota RAV4 2.0L MIL Lamp on VIN: JT3HP10VOV
P0300: Multiple Cylinder Misfire Detected. Vehicle came in with ses light on and no drivability complaints.Code was po300 random misfire detected. road test and checked for misfires and all checked ok. Sold customer 120K service with a major tune up including plugs, wires, cap, rotor, air and fuel filt...
February 02, 2006
2004 Chevrolet Express 2500 4.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GCGG25V24
P0300: Multiple Cylinder Misfire Detected. ... po200 and po300 codes. found cyl # 2 misfires at 150,000 in history and current counter climbing. backprobing at pcm found no injector driver circuit. replaced pcm with ac delco reman and shipped it running great.flash forward to yesterday , van is back , ...
February 03, 2006
2000 Honda CR-V EX 2.0L Misfire, MIL Lamp on VIN: JHLRD1767Y
P0300: Multiple Misfire Detected. ... codes for misfire #1 & #3. Replaced worn out plugs, cap rotor and wires, car came back 300 miles later with coed P0301 mis fire #1, scoped ignition pattern and it looked perfect, let car idle 5 min and MIL came back on again. replaced spark plug just f...
February 03, 2006
1997 Ford Explorer XL 4.0L Poor Idle Quality, Stall, MIL Lamp on
P0300: random misfire. ... these and allready did them. No change at all. has the famous lean codes P0171 and P0174, along with misfire codes. long term fuel trim on bank 2 is 25 long term on bank 1 is -5 its got to be injectors, that's what I am think...
February 07, 2006
2002 GMC Sierra 1500 SL 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GTEK14T12
P0300: Multiple Cylinder Misfire Detected. I have multiple random cylinder missfires occuring mostly when cold. Fuel pressure is 48psi with koer,53psi with koeo, and 58 psi koer with vac line removed from regulator. My spec shows that fuel pressure needs to be 56-62 but does not state with koer, koeo, ...
February 07, 2006
2002 Mercedes-Benz C240 2.6L Misfire, MIL Lamp on VIN: WDBRF61J92
P0300: Multiple Misfire. I Have a problem with cylinder 3 dead misfire. First when you start the car it will run good for about 10-15 seconds then starts mising, constant dead misfire.Good fuel pressure, we switched the injector, ignition coil, wires, sparkplugs form the working cylin...
February 07, 2006
1997 Chevrolet Cavalier 2.2L Misfire, MIL Lamp on VIN: 1G1JC124XV
P0300: Multiple Engine Misfire Detected. Hey GM Tech's. I have this 1997 cavalier that doesn't want to go away. Vehicle origionally came in for a raw fuel smell or fuel leak. Upon checking, found #2 injector wiring connector with fuel coming out of it. Thought would be an easy Fix. Installed new fue...
February 08, 2006
2001 Chevrolet Silverado 1500 5.3L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1GCEK14T81
P0300: Multiple Cylinder Misfire Detected. Truck came in with code P0140 changed b1s2 o2 sensor. came back soon after with codes as above. Checked cat converter for pluged Clean and Clear, could not find vacuum leak at intake with carb clean. Plugs all look good. Missfire monitor 1,3,5,7. Sometimes idl...
February 08, 2006
2002 Ford F-150 XL 4.2L Excessive Emissions, Misfire, MIL Lamp on VIN: 1FTRX17292
P0300: random misfire. Customer came in just wanting a maintenance tune-up, with a complaint of a possible wire breaking down. Installed a new set of plugs and test drove. After this, vehicle had a misfire, which was confirmed with the scanner. pulled the plugs out on cyls 4, 5, and...
February 08, 2006
2000 Saturn LS2 3.0L Misfire, MIL Lamp on VIN: 1G8JW52R7Y
P0300: Random Misfire Detected. ... came in with 2 codes (P0300 & P0304). First thing my tech did was look at missfire data, on our Snap-On MODUS, and noticed cylinder #2 was slowly counting a missfire, but the car was definitly not missfiring. He removed...
February 08, 2006
1997 Chevrolet Cavalier 2.2L Misfire, MIL Lamp on VIN: 1G1JC124XV
P0300: Multiple Engine Misfire Detected. Hey GM Tech's. I have this 1997 cavalier that doesn't want to go away. Vehicle origionally came in for a raw fuel smell or fuel leak. Upon checking, found #2 injector wiring connector with fuel coming out of it. Thought would be an easy Fix. Installed new fue...
February 09, 2006
2002 Mitsubishi Montero XLS 3.5L MIL Lamp on VIN: JA4MW31R82
P0300: Random Misfire Detected. ... days then the( CEL) LIGHT WILL APPEAR with no driveability concerns. will scan and still get same code p0300 random missfire.
February 09, 2006
2004 Chevrolet Aveo 1.6L Misfire VIN: KL1TD62604
P0300: Engine Misfire Detected. Vehicle developes an intermintent miss usually after returning to idle. Customer had spark plugs replaced before bring the car to us. The car will run fine at higher rpm's and develope a miss upon returning to idle. After returning to idle the car will smooth ...
February 10, 2006
1999 Chevrolet S10 2.2L Misfire VIN: 1GCCS144XX
P0300: Multiple Engine Misfire Detected. consistently , at 2,000 rpm up to 2,500 5th gear 80%load throttle varying between 1/2 to 3/4 multiple misfire on cyl. 1. scan data on 4 graph, (modis)confirms misfire.no other sensors are indicating changes during misfire. current ramping tests on injector cir...
February 11, 2006
2002 Honda Odyssey EX 3.5L Poor Idle Quality, Misfire, MIL Lamp on
P0300: Multiple Misfire Detected. Does anyone know what the fuel pressure really should be on this thing?? It was checked at the quick disconnect near the fuel tank, not at the rail, there is no place to check at the rail, alldata says to check with special tool, of course, at the fuel pulse d...
February 12, 2006
1998 Ford Crown Victoria 4.6L Poor Idle Quality, Surge, Stall, Misfire, MIL Lamp on VIN: 2FAFP73W9W
P0300: random misfire. this crown vic seems to have no problem starting but immediately after start up it runs like a pile crap.it feels like it is misfiring on at least one cylinder it also seems to surge at the same time.the problem with this condition is it only lasts about 45 se...
February 14, 2006
2002 Chevrolet Silverado 3500 6.0L Misfire VIN: 1GBJC34U22
P0300: Multiple Cylinder Misfire Detected. gm techs help, this 1 ton has a main fuel tank and a aux. fuel tank. aux tank fuel pump never comes on to pump fuel into main tank. found fuel pump relay for main tank but not for aux. tank. owners manual shows a upfitter relay located in a center of dash fuse...
February 15, 2006
1998 Pontiac Grand Prix GTP 3.8L Misfire, MIL Lamp on VIN: 1G2WP5216W
P0300: Multiple Engine Misfire Detected. ... boost comes in. Feels like loss of fuel. Both O2 sensors read the same. No misfire in cyllinders #2 and #6. #4 and #5 miss the worst. Runs perfect unless under load. New spark plugs, fuel filter, air filter. P0300, multiple cyllinder misfire, is the only c...
February 18, 2006
2000 Mercedes-Benz ML320 3.2L Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 4JGAB54E8Y
P0300: testing and results. Hello guy's I hope you can help me on this one. Begining to look like a problem child and want to get some input before I get too deep. This car used car dealer vehicle so no repair history is available. vehicle came in with complaint of cold hesitation and mi...
February 19, 2006
1998 Toyota Corolla CE 1.8L Misfire, MIL Lamp on VIN: 1NXBR12EXW
P0300: Multiple Cylinder Misfire Detected. A mind boggling misfire here. It feels like a power loss between 2200 and 3000 rpm at 70 to 80% load. Never before 2200 rpm and it picks up and runs great after 3000 rpm. It does not feel like a dead miss, however the misfire counter on cyl #1 starts climbing ...
February 21, 2006
1997 Toyota Camry CE 2.2L Hesitation, Surge VIN: 4T1BG22K5V
P0300: Multiple Cylinder Misfire Detected. car came in check engine light on and hesitating. found random missfire code. had old tune up stuff. replaced wires, fuel filter, spark plugs (toyota ones), pcv. car still hesistates on snap accel. gradual accel ok. fuel pressure is 50 psi. disconnected egr sa...
February 24, 2006
2000 Toyota Echo 1.5L Misfire, MIL Lamp on VIN: JTDBT1230Y
P0300: Multiple Cylinder Misfire Detected. Hello to all, I have a 2000 toyota Echo with a 1.5 liter that has a miss when rounding corners. I have no way of checking fuel pressure on this system, need different adapters that my fuel kit does not have, and I believe vechile is momentarily "running ou...
February 24, 2006
2001 Chevrolet Express 2500 4.3L hard start VIN: 1GCFG25W51
P0300: Multiple Cylinder Misfire Detected. Hey guys, the main complaint is hard starting. I verified this and the engine does not crank smoothly. When cranking and a cylinder fires, the engine jerks to a stop momentarity as if the firing is out of order, just like an engine trying to start with the plu...
February 27, 2006
1999 Buick Regal GS 3.8L Misfire, Excessive plug wear VIN: 2G4WF5214X
P0300: Engine Misfire Detected. What I have here is a 3.8 supercharged with no running problems inidicated when driving until plug tip is burnt off, then will start misfiring. What I have found out is that the plugs were replaced once (500 miles ago) prior to coming to me with a new mass air...
February 28, 2006
1996 Chevrolet S10 4.3L Hesitation VIN: IGCCS14X5T
P0300: Multiple Engine Misfire Detected. Cleared codes and non have retured while test driving. Thought problem might just be related to fuel pump as this is so common on this motor, CPI, lots of posts with my problems fixed by FP replacement. Truck feels like it has a slight miss while going down th...
February 28, 2006
1997 Chevrolet Cavalier LS 2.4L Misfire VIN: 4G1JF32T1V
P0300: Multiple Engine Misfire Detected. Here's the deal customer brought us this 97 cavalier they had just purchased. It was running bad and check engine light was on. I scanned it to find the above codes... first thing I found was a broken vacuum hose to the MAP sensor. I repaired it cleared the co...
February 28, 2006
2001 Mercedes-Benz ML320 3.2L Hesitation, Misfire, MIL Lamp on VIN: 4JGAB54E41
P0300: multiple miss fire. FELLOW TECHS THIS ML 320 IS GIVING ME A PROBLEM,ITS GIVING ME A CYL #3 AND #6 MISSFIRE CODE SOME TIMES #4. ON A REGULAR TEST DRIVE ITS FINE I DROVE IT FOR A HALF HOUR NO PROBLEM NO CODES. I NOTICED THAT IT WOULD ACT UP ONLY WHEN I PUSHED IT HARD AND THE TACH ...
February 28, 2006
1996 Pontiac Grand Am SE 3.1L Surge, Misfire VIN: 1G2NMW12M7
P0300: Multiple Cylinder Misfire Detected. Bad intermittent miss fire. Most on cyl #5. Has a bad surge Idle up and down. No vac leak can be found. We have heard this could be a cam sensor problem?
February 28, 2006