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P0300 Diagnostic Trouble Code Discussion for January 2012

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
2004 Ford Explorer XLS 4.0L Poor Idle Quality, Misfire VIN: 1FMZU62K24
P0300: random misfire. Happy (*%^#!!@@#) New Year! I left on christmas eve with a shop full of problem vehicles, and came back today and they're still here! Lazy bunch of Elves must of gotten drunk and missed my shop. Anyway this Exploder came in with the converters completely restr...
January 02, 2012
2004 Ford Explorer XLS 4.0L Poor Idle Quality, Misfire VIN: 1FMZU62K24
P0300: random misfire. Happy (*%^#!!@@#) New Year! I left on christmas eve with a shop full of problem vehicles, and came back today and they're still here! Lazy bunch of Elves must of gotten drunk and missed my shop. Anyway this Exploder came in with the converters completely restr...
January 04, 2012
2005 Ford F-150 FX4 5.4L Poor Idle Quality, Hesitation, Cuts out, Misfire, MIL Lamp on VIN: 1FTPX14565
Truck has random misfires pretty much all the time only on bank 1. Cylinder #3 seemed worse when truck came in. Tried coil, replaced spark plug with no change. Switched fuel injectors between cylinder #2 & #3. Misfire moved to cyl. #2. Replaced all injecto...
January 04, 2012
2002 Chevrolet Trailblazer LS 4.2L Poor Idle Quality, Misfire VIN: 1GNDT13S72
P0300: Multiple Engine Misfire Detected. installed new plugs, coil boots and new coil on number 3. still can read missfire counters on scanner on cylinder 3. did find vacuum leak on intake and found it warped. Installed new intake and still have the small miss on 3. When I removed the new plug it loo...
January 09, 2012
2003 Ford Escape XLS 3.0L Misfire, MIL Lamp on
P0300: . Car came in smoking from tailpipe, mil flashing, running rough. I originally thought it was simply a coil pack- however raw fuel is coming out of the tailpipe, fuel-- not just water and fuel. I figured the # 1 injector was stuck open. I replaced it with a Ford...
January 09, 2012
2006 Chevrolet Silverado 1500 LT 5.3L Misfire, MIL Lamp on VIN: 3GCEC14Z76
P0300: Multiple Cylinder Misfire Detected. ... complained that the truck ran really bad for a little while and the check engine light was flashing. They said that after a few minutes it started running fine and the light went off. Vehicle test drove fine with no misfires. Found P0300 code and 1800+ mis...
January 10, 2012
2005 Chevrolet Aveo LS 1.6L MIL Lamp on, "hold" lamp VIN: KL1TD52665
P0300: Engine Misfire Detected. ... your time and efforts! As noted, this Aveo exhibits an intermittent p0300 always. No misfire counters on my Tech 2, no driveability issues and cannot feel a misfire. The real problem for my post involves the "hold" lamp that continually flashes in ...
January 11, 2012
2000 Hyundai Elantra GLS 2.0L Misfire, int. long crank VIN: KMHJF35F1Y
P0300: Multiple Misfire Detected. ... gasket no start - removed head sent to machine shop. they said head already machined and can't be cut again. ordered reman. head and installed. long crank on first start up after job. get started and skips a bit then runs good. test drive and recheck fluid...
January 12, 2012
2003 Saab 9-3 Linear 2.0L Cuts out VIN: YS3FB49S13
P0300: Random multiple cylinder misfire detected. ... on acceleration. codes present are P0300, P2122,p2138. not concerned with code P0300 because spark plugs are worn. more concerned with codes P2122 and P2138. these two codes have been coming ...
January 12, 2012
2003 Isuzu Axiom XS 3.5L Misfire VIN: 4S2DF58X33
P0300: Multiple Cylinder Misfire Detected. car came in would not start. replaced timing belt and waterpump. engine starts but only runs on right bank. checked timing alignment 3 times. fuel injectors are working has spark. pulled coil connectors on left side. idle stays the same pull coils on right sid...
January 13, 2012
2001 Jeep Grand Cherokee Laredo 4.0L Misfire, MIL Lamp on VIN: 1J4GW48S71
P0300: Multiple Cylinder Misfire Detected. ... ck engine light on. scanned and found p0300 multiple misfire. monitored it with scanner and found 4 cylinders misfiring #1,2,3,6. pulled plugs and found worn plugs. put all plugs and endend with 2 misfires #2,6. with coil rack over the plugs i was tapping ...
January 14, 2012
2005 Ford Crown Victoria 4.6L Misfire, MIL Lamp on VIN: 2FAFP73W65
P0300: Multipal misfire. Hello Fellow tech's. At IDLE ONLY, one bank (2) has misfire at idle. Off idle, condition goes away and drives great. Spark plugs look good. I have done a smoke check without finding a leak, but maybe an internal intake leak/crack??? 02 is switching good on ban...
January 18, 2012
2003 Isuzu Axiom XS 3.5L Misfire VIN: 4S2DF58X33
P0300: Multiple Cylinder Misfire Detected. car came in would not start. replaced timing belt and waterpump. engine starts but only runs on right bank. checked timing alignment 3 times. fuel injectors are working has spark. pulled coil connectors on left side. idle stays the same pull coils on right sid...
January 18, 2012
2005 Ford Crown Victoria 4.6L Misfire, MIL Lamp on VIN: 2FAFP73W65
P0300: Multipal misfire. Hello Fellow tech's. At IDLE ONLY, one bank (2) has misfire at idle. Off idle, condition goes away and drives great. Spark plugs look good. I have done a smoke check without finding a leak, but maybe an internal intake leak/crack??? 02 is switching good on ban...
January 19, 2012
1999 Saturn SC2 1.9L Misfire VIN: 1G8ZR1270X
P0300: Random Misfire Detected. check engine light on. scaned and has a po300- multiple cyl. misfire. under load cyl. #1&4 misfire. if you unplug the egr valve the misfire goes away. intake is not leaking' replaced ign. coils,module,wires,and plugs with oem pts. tried a new egr valve als...
January 20, 2012
2003 Chevrolet Impala 3.4L Misfire, Pops out intake VIN: 2G1WF52E23
P0300: Multiple Cylinder Misfire Detected. Got this car in the shop, misfiring and poping out the intake, was able to narrow it down to cylinder #2 pull the ign wire off and it will stop poping out intake. Performed a compression test on cyl 2 with 140psi result. I swaped the plug and coil with no chan...
January 21, 2012
2011 Ford E-350 Super Duty 5.4L No Start VIN: 1FDWE3FL4B
P0300: misfire. It cranks and no hit or any type of trying to start. Security is proving out no lamp or codes. all connectors look good.
January 23, 2012
1999 Saturn SC2 1.9L Misfire VIN: 1G8ZR1270X
P0300: Random Misfire Detected. check engine light on. scaned and has a po300- multiple cyl. misfire. under load cyl. #1&4 misfire. if you unplug the egr valve the misfire goes away. intake is not leaking' replaced ign. coils,module,wires,and plugs with oem pts. tried a new egr valve als...
January 23, 2012
1996 Chevrolet Astro 4.3L Misfire VIN: 1GNDM19W1T
P0300: Multiple Cylinder Misfire Detected. Vehicle has a mifire mostly when cold. It happens under acceleration, goes away at speeds over 30 mph when in top gear. Once engine warms up, a very slight miss occasionally, but is almost completley gone. Symptoms seemed to match those for a bad injector asss...
January 24, 2012
1996 Chevrolet Astro 4.3L Misfire VIN: 1GNDM19W1T
P0300: Multiple Cylinder Misfire Detected. Vehicle has a mifire mostly when cold. It happens under acceleration, goes away at speeds over 30 mph when in top gear. Once engine warms up, a very slight miss occasionally, but is almost completley gone. Symptoms seemed to match those for a bad injector asss...
January 25, 2012
1998 Chevrolet C1500 Cheyenne 5.0L Poor Idle Quality, Misfire VIN: 2GCEC19M2W
P0300: Multiple Cylinder Misfire Detected. Have a very strange one here, runs rough and misfires only cold, on cylinders 1, 2, and 3 only. Misfire counts on scanner got up to 50 - 60 per cycle. When first started cold does not miss right away. Has to run 30-45 sec. then starts running rough only cyl. 3...
January 25, 2012
2006 Hummer H2 6.0L Hesitation, Misfire, MIL Lamp on VIN: 5GRGN23U66
P0300: Multiple Cylinder Misfire Detected. ... be on left bank as spark plugs where all Black # 1,3,5 and 7. Right bank #2,4,6 and 8 where clean . Fuel pressure is Normal engine compression good . Did visual check and found left bank catalytic converter had a blue ring. sign of glowing cat ran engine a...
January 25, 2012
1997 Mazda Miata 1.8L MIL Lamp on VIN: JM1NA3537V
P0300: Random Misfire Detected. Hello to all. This Miata has begun generating a check engine light for cylinder misfires at or just following highway driving. Recently, a code started popping up for an IAC concern. We tuned the engine last month (plugs, wires and fuel filter) hoping to fix t...
January 25, 2012
2002 Toyota Corolla CE 1.8L MIL Lamp on VIN: 1NXBR12E42
P0300: Multiple Cylinder Misfire Detected. I have this corolla that is eating my sleep. all these years i have worked on toyotas and lexus and this is the one that got me. I could not figure out now what to do. I have measured the fuel pressure that was about 37psi at idle. next morning before starting...
January 28, 2012
2004 Chevrolet Blazer LS 4.3L Hesitation, Cuts out, MIL Lamp on VIN: 1GNDT13X54
P0300: Multiple Cylinder Misfire Detected. Customer brought blazer for no power bogs really bad and dies out at times,no power at all.Customer did own intake gaskets.Checked distributor to see off tooth and is good.Think have plugged exhaust.#1,3,4 cylinder showing misfire.Hooked back pressure gauge an...
January 30, 2012
2004 Ford Explorer XLS 4.0L Poor Idle Quality, Misfire VIN: 1FMZU62K24
P0300: random misfire. Happy (*%^#!!@@#) New Year! I left on christmas eve with a shop full of problem vehicles, and came back today and they're still here! Lazy bunch of Elves must of gotten drunk and missed my shop. Anyway this Exploder came in with the converters completely restr...
January 02, 2012
2004 Ford Explorer XLS 4.0L Poor Idle Quality, Misfire VIN: 1FMZU62K24
P0300: random misfire. Happy (*%^#!!@@#) New Year! I left on christmas eve with a shop full of problem vehicles, and came back today and they're still here! Lazy bunch of Elves must of gotten drunk and missed my shop. Anyway this Exploder came in with the converters completely restr...
January 04, 2012
2005 Ford F-150 FX4 5.4L Poor Idle Quality, Hesitation, Cuts out, Misfire, MIL Lamp on VIN: 1FTPX14565
Truck has random misfires pretty much all the time only on bank 1. Cylinder #3 seemed worse when truck came in. Tried coil, replaced spark plug with no change. Switched fuel injectors between cylinder #2 & #3. Misfire moved to cyl. #2. Replaced all injecto...
January 04, 2012
2002 Chevrolet Trailblazer LS 4.2L Poor Idle Quality, Misfire VIN: 1GNDT13S72
P0300: Multiple Engine Misfire Detected. installed new plugs, coil boots and new coil on number 3. still can read missfire counters on scanner on cylinder 3. did find vacuum leak on intake and found it warped. Installed new intake and still have the small miss on 3. When I removed the new plug it loo...
January 09, 2012
2003 Ford Escape XLS 3.0L Misfire, MIL Lamp on
P0300: . Car came in smoking from tailpipe, mil flashing, running rough. I originally thought it was simply a coil pack- however raw fuel is coming out of the tailpipe, fuel-- not just water and fuel. I figured the # 1 injector was stuck open. I replaced it with a Ford...
January 09, 2012
2006 Chevrolet Silverado 1500 LT 5.3L Misfire, MIL Lamp on VIN: 3GCEC14Z76
P0300: Multiple Cylinder Misfire Detected. ... complained that the truck ran really bad for a little while and the check engine light was flashing. They said that after a few minutes it started running fine and the light went off. Vehicle test drove fine with no misfires. Found P0300 code and 1800+ mis...
January 10, 2012
2005 Chevrolet Aveo LS 1.6L MIL Lamp on, "hold" lamp VIN: KL1TD52665
P0300: Engine Misfire Detected. ... your time and efforts! As noted, this Aveo exhibits an intermittent p0300 always. No misfire counters on my Tech 2, no driveability issues and cannot feel a misfire. The real problem for my post involves the "hold" lamp that continually flashes in ...
January 11, 2012
2000 Hyundai Elantra GLS 2.0L Misfire, int. long crank VIN: KMHJF35F1Y
P0300: Multiple Misfire Detected. ... gasket no start - removed head sent to machine shop. they said head already machined and can't be cut again. ordered reman. head and installed. long crank on first start up after job. get started and skips a bit then runs good. test drive and recheck fluid...
January 12, 2012
2003 Saab 9-3 Linear 2.0L Cuts out VIN: YS3FB49S13
P0300: Random multiple cylinder misfire detected. ... on acceleration. codes present are P0300, P2122,p2138. not concerned with code P0300 because spark plugs are worn. more concerned with codes P2122 and P2138. these two codes have been coming ...
January 12, 2012
2003 Isuzu Axiom XS 3.5L Misfire VIN: 4S2DF58X33
P0300: Multiple Cylinder Misfire Detected. car came in would not start. replaced timing belt and waterpump. engine starts but only runs on right bank. checked timing alignment 3 times. fuel injectors are working has spark. pulled coil connectors on left side. idle stays the same pull coils on right sid...
January 13, 2012
2001 Jeep Grand Cherokee Laredo 4.0L Misfire, MIL Lamp on VIN: 1J4GW48S71
P0300: Multiple Cylinder Misfire Detected. ... ck engine light on. scanned and found p0300 multiple misfire. monitored it with scanner and found 4 cylinders misfiring #1,2,3,6. pulled plugs and found worn plugs. put all plugs and endend with 2 misfires #2,6. with coil rack over the plugs i was tapping ...
January 14, 2012
2005 Ford Crown Victoria 4.6L Misfire, MIL Lamp on VIN: 2FAFP73W65
P0300: Multipal misfire. Hello Fellow tech's. At IDLE ONLY, one bank (2) has misfire at idle. Off idle, condition goes away and drives great. Spark plugs look good. I have done a smoke check without finding a leak, but maybe an internal intake leak/crack??? 02 is switching good on ban...
January 18, 2012
2003 Isuzu Axiom XS 3.5L Misfire VIN: 4S2DF58X33
P0300: Multiple Cylinder Misfire Detected. car came in would not start. replaced timing belt and waterpump. engine starts but only runs on right bank. checked timing alignment 3 times. fuel injectors are working has spark. pulled coil connectors on left side. idle stays the same pull coils on right sid...
January 18, 2012
2005 Ford Crown Victoria 4.6L Misfire, MIL Lamp on VIN: 2FAFP73W65
P0300: Multipal misfire. Hello Fellow tech's. At IDLE ONLY, one bank (2) has misfire at idle. Off idle, condition goes away and drives great. Spark plugs look good. I have done a smoke check without finding a leak, but maybe an internal intake leak/crack??? 02 is switching good on ban...
January 19, 2012
1999 Saturn SC2 1.9L Misfire VIN: 1G8ZR1270X
P0300: Random Misfire Detected. check engine light on. scaned and has a po300- multiple cyl. misfire. under load cyl. #1&4 misfire. if you unplug the egr valve the misfire goes away. intake is not leaking' replaced ign. coils,module,wires,and plugs with oem pts. tried a new egr valve als...
January 20, 2012
2003 Chevrolet Impala 3.4L Misfire, Pops out intake VIN: 2G1WF52E23
P0300: Multiple Cylinder Misfire Detected. Got this car in the shop, misfiring and poping out the intake, was able to narrow it down to cylinder #2 pull the ign wire off and it will stop poping out intake. Performed a compression test on cyl 2 with 140psi result. I swaped the plug and coil with no chan...
January 21, 2012
2011 Ford E-350 Super Duty 5.4L No Start VIN: 1FDWE3FL4B
P0300: misfire. It cranks and no hit or any type of trying to start. Security is proving out no lamp or codes. all connectors look good.
January 23, 2012
1999 Saturn SC2 1.9L Misfire VIN: 1G8ZR1270X
P0300: Random Misfire Detected. check engine light on. scaned and has a po300- multiple cyl. misfire. under load cyl. #1&4 misfire. if you unplug the egr valve the misfire goes away. intake is not leaking' replaced ign. coils,module,wires,and plugs with oem pts. tried a new egr valve als...
January 23, 2012
1996 Chevrolet Astro 4.3L Misfire VIN: 1GNDM19W1T
P0300: Multiple Cylinder Misfire Detected. Vehicle has a mifire mostly when cold. It happens under acceleration, goes away at speeds over 30 mph when in top gear. Once engine warms up, a very slight miss occasionally, but is almost completley gone. Symptoms seemed to match those for a bad injector asss...
January 24, 2012
1996 Chevrolet Astro 4.3L Misfire VIN: 1GNDM19W1T
P0300: Multiple Cylinder Misfire Detected. Vehicle has a mifire mostly when cold. It happens under acceleration, goes away at speeds over 30 mph when in top gear. Once engine warms up, a very slight miss occasionally, but is almost completley gone. Symptoms seemed to match those for a bad injector asss...
January 25, 2012
1998 Chevrolet C1500 Cheyenne 5.0L Poor Idle Quality, Misfire VIN: 2GCEC19M2W
P0300: Multiple Cylinder Misfire Detected. Have a very strange one here, runs rough and misfires only cold, on cylinders 1, 2, and 3 only. Misfire counts on scanner got up to 50 - 60 per cycle. When first started cold does not miss right away. Has to run 30-45 sec. then starts running rough only cyl. 3...
January 25, 2012
2006 Hummer H2 6.0L Hesitation, Misfire, MIL Lamp on VIN: 5GRGN23U66
P0300: Multiple Cylinder Misfire Detected. ... be on left bank as spark plugs where all Black # 1,3,5 and 7. Right bank #2,4,6 and 8 where clean . Fuel pressure is Normal engine compression good . Did visual check and found left bank catalytic converter had a blue ring. sign of glowing cat ran engine a...
January 25, 2012
1997 Mazda Miata 1.8L MIL Lamp on VIN: JM1NA3537V
P0300: Random Misfire Detected. Hello to all. This Miata has begun generating a check engine light for cylinder misfires at or just following highway driving. Recently, a code started popping up for an IAC concern. We tuned the engine last month (plugs, wires and fuel filter) hoping to fix t...
January 25, 2012
2002 Toyota Corolla CE 1.8L MIL Lamp on VIN: 1NXBR12E42
P0300: Multiple Cylinder Misfire Detected. I have this corolla that is eating my sleep. all these years i have worked on toyotas and lexus and this is the one that got me. I could not figure out now what to do. I have measured the fuel pressure that was about 37psi at idle. next morning before starting...
January 28, 2012
2004 Chevrolet Blazer LS 4.3L Hesitation, Cuts out, MIL Lamp on VIN: 1GNDT13X54
P0300: Multiple Cylinder Misfire Detected. Customer brought blazer for no power bogs really bad and dies out at times,no power at all.Customer did own intake gaskets.Checked distributor to see off tooth and is good.Think have plugged exhaust.#1,3,4 cylinder showing misfire.Hooked back pressure gauge an...
January 30, 2012