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P0300 Diagnostic Trouble Code Discussion for July 2007

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
2002 GMC Yukon XL 1500 SLE 5.3L Excessive Emissions, Cuts out, Misfire, MIL Lamp on VIN: 3GKFK16Z72
P0300: Multiple Cylinder Misfire Detected. REALLY PULLING OUT HAIR OUT ! -- ONLY WHEN COLD THIS VEHICLE MISSFIRES BADLY - NEW PLUGS, WIRES, INJECTION CLEANING, CHECKED O2 SENSORS AND SWAPPED SIDE TO SIDE, CHECKED EXHAUST BACKPRESSURE 2.5 MAX, SWAPPED COILS SIDE TO SIDE AND STFT STAYS AT MINUS 13 AND HC...
July 02, 2007
2000 Pontiac Grand Prix GTP 3.8L Misfire, MIL Lamp on VIN: 1G2WR5218Y
P0300: Engine Misfire Detected. The car came to our shop with a miss under heavy load especially when the supercharger kicked in. Apon visual inspection we noticed the front three wires were arching so a complate tune up was preformed. The car left all was well. Three days,100km later the mi...
July 04, 2007
1997 Dodge Intrepid 3.3L Excessive Emissions VIN: 2B3HD46T9V
P0300: Multiple Cylinder Misfire Detected. thanks in advance for any suggestions.this vehicle is failing asm test for hc co and nox.at that time had no codes in memory.with scan tool connected mil came on and code po300.checked 1 trip indicators has codes po301 through p0306.no misfires ever felt.while...
July 05, 2007
2001 Ford Explorer XLS 5.0L Excessive Emissions, Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1FMZU83P2Z
P0300: multipule cly. missfire. This one is driving me crazy. It came in with check engine lamp and a missfire. The codes were random cly. missfire and cly #3 missfire. I pulled #3 plug the gap was about 70. I replaced all the plugs and wires. Still runs the same. I have a good coil and I sw...
July 05, 2007
1999 Land Rover Range Rover SE 4.0L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: SALPV1246X
P0300: Multiple cylinder misfire. Thanks to all of you who try to help me tackle this one. Cold start the vehicle idles rough and misfires for a couple minutes, then idle smooths out and misfire disappears. Cold, or warm, open the throttle and the vehicle hesitates. Not just momentarily but a ...
July 05, 2007
2000 Pontiac Grand Prix GTP 3.8L Misfire, MIL Lamp on VIN: 1G2WR5218Y
P0300: Engine Misfire Detected. The car came to our shop with a miss under heavy load especially when the supercharger kicked in. Apon visual inspection we noticed the front three wires were arching so a complate tune up was preformed. The car left all was well. Three days,100km later the mi...
July 05, 2007
1997 Chevrolet Camaro 3.8L Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 2G1FP22K9V
P0300: Multiple Engine Misfire Detected. This car bogs down really bad during accel when cold. Also after it's warm it will surge around 3500 at full throttle like it has a governor. I definitely suspect a bad MAF but dont know what its range should be. It acts like low fuel pressure or plugged filte...
July 06, 2007
2002 Mercedes-Benz C240 2.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: WDBRF61J82
P0300: Multiples Misfires. This problem happens only after 30 minutes or more of engine running and when its present if you cycle Ign OFF and start engine again problem disapear for many minutes; also What I found in misfire cylinders is that ignition coil firing signal is missed, Power...
July 06, 2007
1998 Nissan Maxima GLE 3.0L No Start, Misfire VIN: JN1CA21D3W
P0300: Multiple Misfire Detected. Hello again fellow techs.Had this one posted a while ago with fix.It didnt last.Co-worker did engine R&R with used motor.Suddenly developed this starting problem.Motor would crank &crank,kick back at times, crank&crank ,when it finally would start ...
July 06, 2007
2002 Nissan Altima 2.5L Misfire VIN: 1N4AL11D02
P0300: Multiple Misfire Detected. ... found, monitored pcm and cannot recreate misfire, consult shows p0300 misfire 3 times, engine runs smooth, anyone seen this before on the newer alimas?
July 06, 2007
1997 Chevrolet Camaro 3.8L Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 2G1FP22K9V
P0300: Multiple Engine Misfire Detected. This car bogs down really bad during accel when cold. Also after it's warm it will surge around 3500 at full throttle like it has a governor. I definitely suspect a bad MAF but dont know what its range should be. It acts like low fuel pressure or plugged filte...
July 07, 2007
1996 Jaguar XJ6 4.0L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G4BR82PXR
P0300: Multiple cylinder misfire detected. ... misfire, intermittent MIL on, code P1314 present. Found air leaks at intake tube to throttle body boot and crack at IAT sensor in tube. Repaired. No change. Weird. Tested coils, fuel injectors, and circuits electrically - ok. Checked fuel pressure and comp...
July 07, 2007
2001 Dodge Ram 3500 Truck 5.9L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2B5WB35ZX1
P0300: Multiple Cylinder Misfire Detected. Van is a backup runner sets alot- came missing under load Idle ok when first started but after driving misfiring van idles ruff Found vac. leak under intake ceter cover - replaced gaskets- run fuel system clean Still misfires- checked fuel presure 55 psi./ Ign...
July 09, 2007
2002 Dodge Dakota SLT 3.9L Hesitation, Surge, Misfire, MIL Lamp on VIN: 1B7GL42X22
P0300: Multiple Cylinder Misfire Detected. ... intermittently after it is driven about two miles either cold or hot. it will shake under load and backfires. it also boggs out very bad. once these symptoms go away it runs great. we scanned it and found the codes listed as history. the only code that is ...
July 09, 2007
2001 Ford Explorer XLS 5.0L Excessive Emissions, Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1FMZU83P2Z
P0300: multipule cly. missfire. This one is driving me crazy. It came in with check engine lamp and a missfire. The codes were random cly. missfire and cly #3 missfire. I pulled #3 plug the gap was about 70. I replaced all the plugs and wires. Still runs the same. I have a good coil and I sw...
July 09, 2007
1998 Ford Explorer XL 4.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FMZU34X1W
P0300: multiple misfire code. ... another shop and its got me thinking.first cylinders 1 through 6 register misfires from 4096 to 8192 counters but does not register a misfire malfunction. secondly the misfire counter only shows the above two numbers, not 1 to 4096 but just 4096 and then a...
July 10, 2007
2003 Cadillac Seville STS 4.6L Misfire, MIL Lamp on VIN: 1G6KY54913
P0300: Engine Misfire Detected. Computer Scan, Miss #5 cyl., compression test was good. Fuel pressure was good. Swapped spark plugs to other cylinders, swapped spark plug boots to other cylinders. Tested & lab scoped fuel injectors, swapped fuel injectors to other cylinders, checked with...
July 11, 2007
2001 Dodge Ram 3500 Truck 5.9L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2B5WB35ZX1
P0300: Multiple Cylinder Misfire Detected. Van is a backup runner sets alot- came missing under load Idle ok when first started but after driving misfiring van idles ruff Found vac. leak under intake ceter cover - replaced gaskets- run fuel system clean Still misfires- checked fuel presure 55 psi./ Ign...
July 11, 2007
1999 Chevrolet K1500 Suburban 5.7L Misfire, MIL Lamp on VIN: 3GNFK16R9X
P0300: Multiple Cylinder Misfire Detected. ... this vehicle came to me with the complaint of poor runing. the engine has been replaced in the last year with crate motor. found p0300 and obvious misfire, performed tune but vehicle still rus poorly between 3000 and 4000 rpm. even in the stall if reved to...
July 12, 2007
1996 Chrysler Cirrus LX 2.5L MIL Lamp on VIN: 1C3EJ56H8T
P0300: Multiple Cylinder Misfire Detected. I get the P0300 code when on freeway going 62 mph,or in park holding the throtle at 2300rpm. The cam and crank stays in sync always. The advance stays at 24 deg. I have good fuel pressure, vaccum stays steady at 19. I cannot feel a miss, car does not stumble. ...
July 12, 2007
2001 Chrysler 300M 3.5L Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 2C3HE66G11
P0300: Multiple Cylinder Misfire Detected. Hello IATN fans, i have this really big problem with this 300m. the customer came into my shop and told me the check engine light was on and the vehicle was running rough. i checked the vehicle out and found 3 dtc's. po300, po305, and po306. i cleared the cod...
July 13, 2007
2002 Dodge Dakota SLT 3.9L Hesitation, Surge, Misfire, MIL Lamp on VIN: 1B7GL42X22
P0300: Multiple Cylinder Misfire Detected. ... intermittently after it is driven about two miles either cold or hot. it will shake under load and backfires. it also boggs out very bad. once these symptoms go away it runs great. we scanned it and found the codes listed as history. the only code that is ...
July 13, 2007
2000 Pontiac Grand Prix GT 3.8L No Start VIN: 1G2WP12K8Y
P0300: Engine Misfire Detected. Vehicle will start and run for 2+ seconds.. Shuts down by stopping injectors.. There is no 'theift' light present.. Oil level is correct.. Fuel pressure and fuel quality are correct.. 60 psi at prime and rests at 50 psi.. Remote locks and unlocks doors.. I am ...
July 13, 2007
2000 Infiniti I30 3.0L Hesitation, Stall, Misfire, MIL Lamp on VIN: JNKCA31A6Y
P0300: Multiple Misfire Detected. ... hopefully someone can point me in the right direction. This I30 came in with a concern of no power on acceleration. I drove the car & confirmed almost anything past half throttle and the car would start losing power unless i backed off the throttle. It...
July 14, 2007
2004 Chevrolet Express 3500 6.0L Misfire, MIL Lamp on VIN: 1GBHG31U44
P0300: Multiple Cylinder Misfire Detected. hey guys. i am thinking i have a valve prob here? has any one run in to carbon build up on valve stems that keep them from closing? i have 130 lb on a crank comp test , and on a run test 0 lb with an ocational bounce in press. to 50 lb. when i rev it it will b...
July 15, 2007
2004 Chevrolet Express 3500 6.0L Misfire, MIL Lamp on VIN: 1GBHG31U44
P0300: Multiple Cylinder Misfire Detected. hey guys. i am thinking i have a valve prob here? has any one run in to carbon build up on valve stems that keep them from closing? i have 130 lb on a crank comp test , and on a run test 0 lb with an ocational bounce in press. to 50 lb. when i rev it it will b...
July 16, 2007
2002 Mercedes-Benz S600 5.8L Misfire, MIL Lamp on VIN: WDBNG78J72
P0300: Rand cylinder misfires. ... been in and out several times. The latest problem has become a mystery. The car is running on only the left bank (cylinders 7-12). The right bank (cylinders 1-6) is dead. The car runs very smooth but has very little power. After looking at several misfire ...
July 16, 2007
2002 Audi A4 1.8L No Start, Hesitation, Misfire, MIL Lamp on VIN: WAULC68E12
P0300: Random Misfire. Hey Guys, I have a 2002 Audi A4 1.8 Turbo Quattro. It was brought it because it would not start for the customer after is sputtered and stall. It was towed in and we replaced a bad coil. Two days latter the same thing happens. This time I go to pick up the ca...
July 18, 2007
1998 Chevrolet S10 LS 4.3L Poor Idle Quality, Misfire VIN: 1GCCS19X0W
P0300: Multiple Engine Misfire Detected. ... plugs, wires, dis cap and fuel filter left and it was all right. came back it set a p0300 and we could see it was misfiring on 1,3,5. we did 2 injectors drove for awhile was misfiring again 1,3,5. we than put a dist. on it and it was the same thing drive i...
July 18, 2007
2001 Lexus LS430 4.3L MIL Lamp on VIN: JT8BF28G8Y
P0300: Multiple Cylinder Misfire Detected. Car sets a po300 missfire code but runs great, code sets after start up. Dealer has replaced the spark plugs twice because they said the plugs were loose.No customer complaints on driving, starting, stalling etc, just that the light comes on. Dealer states the...
July 19, 2007
2003 Nissan Sentra SE-R 2.5L Misfire VIN: 3N1AB51D23
P0300: Multiple Misfire Detected. Vehicle originally came in with Cyl #3 plug gap closed, complaint was misfire. Install new plugs, Check freeze frame, and fuel trims normal. Let vehicle go, came back 3 days later with Cyl #1&4 plug gaps closed. Swap coils into cyl #2, and have not had a p...
July 19, 2007
2002 Mercedes-Benz C240 2.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: WDBRF61J82
P0300: Multiples Misfires. This problem happens only after 30 minutes or more of engine running and when its present if you cycle Ign OFF and start engine again problem disapear for many minutes; also What I found in misfire cylinders is that ignition coil firing signal is missed, Power...
July 21, 2007
2001 Audi S4 Avant 2.7L Surge, MIL Lamp on VIN: WAURD68D71
P0300: Multiple random misfire. Vehicle came in with a turbo boost problem.Seemed the turbo was surging upon boost first 15lbs. then 10lbs. erratically and continous always.We did a quick test on the computer memory.Recorded the codes then cleared them and drove the car and no codes have ret...
July 23, 2007
2001 Mazda MPV DX 2.5L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: JM3LW28G01
P0300: Multiple Misfire Detected. it is a 2.5l, it has no throttle power, skips at idle, pops back thru the intake at idle and while depressing the throttle. Tried another MAF sensor also didnt work.Here are the readings from Genysis, TP voltage at idle is .92 and 4.6v at wot,the following rea...
July 23, 2007
1996 Jaguar XJ6 4.0L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G4BR82PXR
P0300: Multiple cylinder misfire detected. ... misfire, intermittent MIL on, code P1314 present. Found air leaks at intake tube to throttle body boot and crack at IAT sensor in tube. Repaired. No change. Weird. Tested coils, fuel injectors, and circuits electrically - ok. Checked fuel pressure and comp...
July 24, 2007
1999 Buick Regal LS 3.8L Misfire VIN: 2G4WB52K4X
P0300: Engine Misfire Detected. ... time for a poor run condition, it sets a p0300 missfire code and the customer complains of a lack of power. this is the only code set and i have not experinced the complaint. however in the p0300 freeze frame data i noticed the baro at 71 inhg, while the m...
July 25, 2007
2001 Buick Regal LS 3.8L Misfire VIN: 2G4WB55KX1
P0300: Multiple Engine Misfire Detected. At approx 4000 rpms, the motor stumbles and looses power considerably. Idles fine. Test drove vehicle with scanner hooked up. Misfired in cyl 1- 14 times, cyl 4- 6 times, and cyl 6- 4 times, on acceleration. Does the vehicle have a rev limiter at 4000 rpms? Cu...
July 25, 2007
2000 BMW Z3 M Roadster 3.2L Misfire, MIL Lamp on VIN: WBSCM9342Y
P0300: Random Misfire. Please help me! This BMW is intermittantly dropping what seems to be a random cylinder. I can never catch it in the act with test equipment hooked up, but experienced it once. It SEEMS like a injector or two dropping out and is most pronounced at idle. Cars wi...
July 26, 2007
1999 Chevrolet Venture 3.4L Excessive Emissions, Poor Idle Quality, Surge, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GNDX03E1X
P0300: Multiple Cylinder Misfire Detected. Intake gasket started leaking externally at 70,000 miles.Added alumnaseal stop leak for temp repair.At 130,000 miles engine developed a missfire,I assumed it was related to the intake gasket.Replaced intake gasket.Gasket was only damaged externally, no interna...
July 29, 2007
1999 Buick Regal LS 3.8L Misfire VIN: 2G4WB52K4X
P0300: Engine Misfire Detected. ... time for a poor run condition, it sets a p0300 missfire code and the customer complains of a lack of power. this is the only code set and i have not experinced the complaint. however in the p0300 freeze frame data i noticed the baro at 71 inhg, while the m...
July 30, 2007
2003 Cadillac Seville STS 4.6L Misfire, MIL Lamp on VIN: 1G6KY54913
P0300: Engine Misfire Detected. Computer Scan, Miss #5 cyl., compression test was good. Fuel pressure was good. Swapped spark plugs to other cylinders, swapped spark plug boots to other cylinders. Tested & lab scoped fuel injectors, swapped fuel injectors to other cylinders, checked with...
July 30, 2007
1996 Chrysler Sebring LXi 2.5L Misfire, MIL Lamp on VIN: 4C3AU52N8T
P0300: Multiple Cylinder Misfire Detected. The codes set when on hwy speeds only 60 to 70 mph not all the time code will set and never has come on in town driving. so with a little of your help i hope to find a solid way of confirming what is the problem.I did find a artical on egr sticking but cannot ...
July 30, 2007
2001 Buick Regal LS 3.8L Misfire VIN: 2G4WB55KX1
P0300: Multiple Engine Misfire Detected. At approx 4000 rpms, the motor stumbles and looses power considerably. Idles fine. Test drove vehicle with scanner hooked up. Misfired in cyl 1- 14 times, cyl 4- 6 times, and cyl 6- 4 times, on acceleration. Does the vehicle have a rev limiter at 4000 rpms? Cu...
July 31, 2007
2001 Chrysler Town & Country (Van) Limited 3.8L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 2C8GP64L51
P0300: Misfires random/multiple. ... fuel economy. No CELs @ time of pickup. Within a week and one long trip, customer returned vehicle stating that intermittantly the CEL would come on.(Noted no driveability issues) Code @ that time was P0300. Found nothing...
July 31, 2007
2002 GMC Yukon XL 1500 SLE 5.3L Excessive Emissions, Cuts out, Misfire, MIL Lamp on VIN: 3GKFK16Z72
P0300: Multiple Cylinder Misfire Detected. REALLY PULLING OUT HAIR OUT ! -- ONLY WHEN COLD THIS VEHICLE MISSFIRES BADLY - NEW PLUGS, WIRES, INJECTION CLEANING, CHECKED O2 SENSORS AND SWAPPED SIDE TO SIDE, CHECKED EXHAUST BACKPRESSURE 2.5 MAX, SWAPPED COILS SIDE TO SIDE AND STFT STAYS AT MINUS 13 AND HC...
July 02, 2007
2000 Pontiac Grand Prix GTP 3.8L Misfire, MIL Lamp on VIN: 1G2WR5218Y
P0300: Engine Misfire Detected. The car came to our shop with a miss under heavy load especially when the supercharger kicked in. Apon visual inspection we noticed the front three wires were arching so a complate tune up was preformed. The car left all was well. Three days,100km later the mi...
July 04, 2007
1997 Dodge Intrepid 3.3L Excessive Emissions VIN: 2B3HD46T9V
P0300: Multiple Cylinder Misfire Detected. thanks in advance for any suggestions.this vehicle is failing asm test for hc co and nox.at that time had no codes in memory.with scan tool connected mil came on and code po300.checked 1 trip indicators has codes po301 through p0306.no misfires ever felt.while...
July 05, 2007
2001 Ford Explorer XLS 5.0L Excessive Emissions, Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1FMZU83P2Z
P0300: multipule cly. missfire. This one is driving me crazy. It came in with check engine lamp and a missfire. The codes were random cly. missfire and cly #3 missfire. I pulled #3 plug the gap was about 70. I replaced all the plugs and wires. Still runs the same. I have a good coil and I sw...
July 05, 2007
1999 Land Rover Range Rover SE 4.0L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: SALPV1246X
P0300: Multiple cylinder misfire. Thanks to all of you who try to help me tackle this one. Cold start the vehicle idles rough and misfires for a couple minutes, then idle smooths out and misfire disappears. Cold, or warm, open the throttle and the vehicle hesitates. Not just momentarily but a ...
July 05, 2007
2000 Pontiac Grand Prix GTP 3.8L Misfire, MIL Lamp on VIN: 1G2WR5218Y
P0300: Engine Misfire Detected. The car came to our shop with a miss under heavy load especially when the supercharger kicked in. Apon visual inspection we noticed the front three wires were arching so a complate tune up was preformed. The car left all was well. Three days,100km later the mi...
July 05, 2007
1997 Chevrolet Camaro 3.8L Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 2G1FP22K9V
P0300: Multiple Engine Misfire Detected. This car bogs down really bad during accel when cold. Also after it's warm it will surge around 3500 at full throttle like it has a governor. I definitely suspect a bad MAF but dont know what its range should be. It acts like low fuel pressure or plugged filte...
July 06, 2007
2002 Mercedes-Benz C240 2.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: WDBRF61J82
P0300: Multiples Misfires. This problem happens only after 30 minutes or more of engine running and when its present if you cycle Ign OFF and start engine again problem disapear for many minutes; also What I found in misfire cylinders is that ignition coil firing signal is missed, Power...
July 06, 2007
1998 Nissan Maxima GLE 3.0L No Start, Misfire VIN: JN1CA21D3W
P0300: Multiple Misfire Detected. Hello again fellow techs.Had this one posted a while ago with fix.It didnt last.Co-worker did engine R&R with used motor.Suddenly developed this starting problem.Motor would crank &crank,kick back at times, crank&crank ,when it finally would start ...
July 06, 2007
2002 Nissan Altima 2.5L Misfire VIN: 1N4AL11D02
P0300: Multiple Misfire Detected. ... found, monitored pcm and cannot recreate misfire, consult shows p0300 misfire 3 times, engine runs smooth, anyone seen this before on the newer alimas?
July 06, 2007
1997 Chevrolet Camaro 3.8L Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 2G1FP22K9V
P0300: Multiple Engine Misfire Detected. This car bogs down really bad during accel when cold. Also after it's warm it will surge around 3500 at full throttle like it has a governor. I definitely suspect a bad MAF but dont know what its range should be. It acts like low fuel pressure or plugged filte...
July 07, 2007
1996 Jaguar XJ6 4.0L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G4BR82PXR
P0300: Multiple cylinder misfire detected. ... misfire, intermittent MIL on, code P1314 present. Found air leaks at intake tube to throttle body boot and crack at IAT sensor in tube. Repaired. No change. Weird. Tested coils, fuel injectors, and circuits electrically - ok. Checked fuel pressure and comp...
July 07, 2007
2001 Dodge Ram 3500 Truck 5.9L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2B5WB35ZX1
P0300: Multiple Cylinder Misfire Detected. Van is a backup runner sets alot- came missing under load Idle ok when first started but after driving misfiring van idles ruff Found vac. leak under intake ceter cover - replaced gaskets- run fuel system clean Still misfires- checked fuel presure 55 psi./ Ign...
July 09, 2007
2002 Dodge Dakota SLT 3.9L Hesitation, Surge, Misfire, MIL Lamp on VIN: 1B7GL42X22
P0300: Multiple Cylinder Misfire Detected. ... intermittently after it is driven about two miles either cold or hot. it will shake under load and backfires. it also boggs out very bad. once these symptoms go away it runs great. we scanned it and found the codes listed as history. the only code that is ...
July 09, 2007
2001 Ford Explorer XLS 5.0L Excessive Emissions, Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1FMZU83P2Z
P0300: multipule cly. missfire. This one is driving me crazy. It came in with check engine lamp and a missfire. The codes were random cly. missfire and cly #3 missfire. I pulled #3 plug the gap was about 70. I replaced all the plugs and wires. Still runs the same. I have a good coil and I sw...
July 09, 2007
1998 Ford Explorer XL 4.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FMZU34X1W
P0300: multiple misfire code. ... another shop and its got me thinking.first cylinders 1 through 6 register misfires from 4096 to 8192 counters but does not register a misfire malfunction. secondly the misfire counter only shows the above two numbers, not 1 to 4096 but just 4096 and then a...
July 10, 2007
2003 Cadillac Seville STS 4.6L Misfire, MIL Lamp on VIN: 1G6KY54913
P0300: Engine Misfire Detected. Computer Scan, Miss #5 cyl., compression test was good. Fuel pressure was good. Swapped spark plugs to other cylinders, swapped spark plug boots to other cylinders. Tested & lab scoped fuel injectors, swapped fuel injectors to other cylinders, checked with...
July 11, 2007
2001 Dodge Ram 3500 Truck 5.9L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2B5WB35ZX1
P0300: Multiple Cylinder Misfire Detected. Van is a backup runner sets alot- came missing under load Idle ok when first started but after driving misfiring van idles ruff Found vac. leak under intake ceter cover - replaced gaskets- run fuel system clean Still misfires- checked fuel presure 55 psi./ Ign...
July 11, 2007
1999 Chevrolet K1500 Suburban 5.7L Misfire, MIL Lamp on VIN: 3GNFK16R9X
P0300: Multiple Cylinder Misfire Detected. ... this vehicle came to me with the complaint of poor runing. the engine has been replaced in the last year with crate motor. found p0300 and obvious misfire, performed tune but vehicle still rus poorly between 3000 and 4000 rpm. even in the stall if reved to...
July 12, 2007
1996 Chrysler Cirrus LX 2.5L MIL Lamp on VIN: 1C3EJ56H8T
P0300: Multiple Cylinder Misfire Detected. I get the P0300 code when on freeway going 62 mph,or in park holding the throtle at 2300rpm. The cam and crank stays in sync always. The advance stays at 24 deg. I have good fuel pressure, vaccum stays steady at 19. I cannot feel a miss, car does not stumble. ...
July 12, 2007
2001 Chrysler 300M 3.5L Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 2C3HE66G11
P0300: Multiple Cylinder Misfire Detected. Hello IATN fans, i have this really big problem with this 300m. the customer came into my shop and told me the check engine light was on and the vehicle was running rough. i checked the vehicle out and found 3 dtc's. po300, po305, and po306. i cleared the cod...
July 13, 2007
2002 Dodge Dakota SLT 3.9L Hesitation, Surge, Misfire, MIL Lamp on VIN: 1B7GL42X22
P0300: Multiple Cylinder Misfire Detected. ... intermittently after it is driven about two miles either cold or hot. it will shake under load and backfires. it also boggs out very bad. once these symptoms go away it runs great. we scanned it and found the codes listed as history. the only code that is ...
July 13, 2007
2000 Pontiac Grand Prix GT 3.8L No Start VIN: 1G2WP12K8Y
P0300: Engine Misfire Detected. Vehicle will start and run for 2+ seconds.. Shuts down by stopping injectors.. There is no 'theift' light present.. Oil level is correct.. Fuel pressure and fuel quality are correct.. 60 psi at prime and rests at 50 psi.. Remote locks and unlocks doors.. I am ...
July 13, 2007
2000 Infiniti I30 3.0L Hesitation, Stall, Misfire, MIL Lamp on VIN: JNKCA31A6Y
P0300: Multiple Misfire Detected. ... hopefully someone can point me in the right direction. This I30 came in with a concern of no power on acceleration. I drove the car & confirmed almost anything past half throttle and the car would start losing power unless i backed off the throttle. It...
July 14, 2007
2004 Chevrolet Express 3500 6.0L Misfire, MIL Lamp on VIN: 1GBHG31U44
P0300: Multiple Cylinder Misfire Detected. hey guys. i am thinking i have a valve prob here? has any one run in to carbon build up on valve stems that keep them from closing? i have 130 lb on a crank comp test , and on a run test 0 lb with an ocational bounce in press. to 50 lb. when i rev it it will b...
July 15, 2007
2004 Chevrolet Express 3500 6.0L Misfire, MIL Lamp on VIN: 1GBHG31U44
P0300: Multiple Cylinder Misfire Detected. hey guys. i am thinking i have a valve prob here? has any one run in to carbon build up on valve stems that keep them from closing? i have 130 lb on a crank comp test , and on a run test 0 lb with an ocational bounce in press. to 50 lb. when i rev it it will b...
July 16, 2007
2002 Mercedes-Benz S600 5.8L Misfire, MIL Lamp on VIN: WDBNG78J72
P0300: Rand cylinder misfires. ... been in and out several times. The latest problem has become a mystery. The car is running on only the left bank (cylinders 7-12). The right bank (cylinders 1-6) is dead. The car runs very smooth but has very little power. After looking at several misfire ...
July 16, 2007
2002 Audi A4 1.8L No Start, Hesitation, Misfire, MIL Lamp on VIN: WAULC68E12
P0300: Random Misfire. Hey Guys, I have a 2002 Audi A4 1.8 Turbo Quattro. It was brought it because it would not start for the customer after is sputtered and stall. It was towed in and we replaced a bad coil. Two days latter the same thing happens. This time I go to pick up the ca...
July 18, 2007
1998 Chevrolet S10 LS 4.3L Poor Idle Quality, Misfire VIN: 1GCCS19X0W
P0300: Multiple Engine Misfire Detected. ... plugs, wires, dis cap and fuel filter left and it was all right. came back it set a p0300 and we could see it was misfiring on 1,3,5. we did 2 injectors drove for awhile was misfiring again 1,3,5. we than put a dist. on it and it was the same thing drive i...
July 18, 2007
2001 Lexus LS430 4.3L MIL Lamp on VIN: JT8BF28G8Y
P0300: Multiple Cylinder Misfire Detected. Car sets a po300 missfire code but runs great, code sets after start up. Dealer has replaced the spark plugs twice because they said the plugs were loose.No customer complaints on driving, starting, stalling etc, just that the light comes on. Dealer states the...
July 19, 2007
2003 Nissan Sentra SE-R 2.5L Misfire VIN: 3N1AB51D23
P0300: Multiple Misfire Detected. Vehicle originally came in with Cyl #3 plug gap closed, complaint was misfire. Install new plugs, Check freeze frame, and fuel trims normal. Let vehicle go, came back 3 days later with Cyl #1&4 plug gaps closed. Swap coils into cyl #2, and have not had a p...
July 19, 2007
2002 Mercedes-Benz C240 2.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: WDBRF61J82
P0300: Multiples Misfires. This problem happens only after 30 minutes or more of engine running and when its present if you cycle Ign OFF and start engine again problem disapear for many minutes; also What I found in misfire cylinders is that ignition coil firing signal is missed, Power...
July 21, 2007
2001 Audi S4 Avant 2.7L Surge, MIL Lamp on VIN: WAURD68D71
P0300: Multiple random misfire. Vehicle came in with a turbo boost problem.Seemed the turbo was surging upon boost first 15lbs. then 10lbs. erratically and continous always.We did a quick test on the computer memory.Recorded the codes then cleared them and drove the car and no codes have ret...
July 23, 2007
2001 Mazda MPV DX 2.5L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: JM3LW28G01
P0300: Multiple Misfire Detected. it is a 2.5l, it has no throttle power, skips at idle, pops back thru the intake at idle and while depressing the throttle. Tried another MAF sensor also didnt work.Here are the readings from Genysis, TP voltage at idle is .92 and 4.6v at wot,the following rea...
July 23, 2007
1996 Jaguar XJ6 4.0L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G4BR82PXR
P0300: Multiple cylinder misfire detected. ... misfire, intermittent MIL on, code P1314 present. Found air leaks at intake tube to throttle body boot and crack at IAT sensor in tube. Repaired. No change. Weird. Tested coils, fuel injectors, and circuits electrically - ok. Checked fuel pressure and comp...
July 24, 2007
1999 Buick Regal LS 3.8L Misfire VIN: 2G4WB52K4X
P0300: Engine Misfire Detected. ... time for a poor run condition, it sets a p0300 missfire code and the customer complains of a lack of power. this is the only code set and i have not experinced the complaint. however in the p0300 freeze frame data i noticed the baro at 71 inhg, while the m...
July 25, 2007
2001 Buick Regal LS 3.8L Misfire VIN: 2G4WB55KX1
P0300: Multiple Engine Misfire Detected. At approx 4000 rpms, the motor stumbles and looses power considerably. Idles fine. Test drove vehicle with scanner hooked up. Misfired in cyl 1- 14 times, cyl 4- 6 times, and cyl 6- 4 times, on acceleration. Does the vehicle have a rev limiter at 4000 rpms? Cu...
July 25, 2007
2000 BMW Z3 M Roadster 3.2L Misfire, MIL Lamp on VIN: WBSCM9342Y
P0300: Random Misfire. Please help me! This BMW is intermittantly dropping what seems to be a random cylinder. I can never catch it in the act with test equipment hooked up, but experienced it once. It SEEMS like a injector or two dropping out and is most pronounced at idle. Cars wi...
July 26, 2007
1999 Chevrolet Venture 3.4L Excessive Emissions, Poor Idle Quality, Surge, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GNDX03E1X
P0300: Multiple Cylinder Misfire Detected. Intake gasket started leaking externally at 70,000 miles.Added alumnaseal stop leak for temp repair.At 130,000 miles engine developed a missfire,I assumed it was related to the intake gasket.Replaced intake gasket.Gasket was only damaged externally, no interna...
July 29, 2007
1999 Buick Regal LS 3.8L Misfire VIN: 2G4WB52K4X
P0300: Engine Misfire Detected. ... time for a poor run condition, it sets a p0300 missfire code and the customer complains of a lack of power. this is the only code set and i have not experinced the complaint. however in the p0300 freeze frame data i noticed the baro at 71 inhg, while the m...
July 30, 2007
2003 Cadillac Seville STS 4.6L Misfire, MIL Lamp on VIN: 1G6KY54913
P0300: Engine Misfire Detected. Computer Scan, Miss #5 cyl., compression test was good. Fuel pressure was good. Swapped spark plugs to other cylinders, swapped spark plug boots to other cylinders. Tested & lab scoped fuel injectors, swapped fuel injectors to other cylinders, checked with...
July 30, 2007
1996 Chrysler Sebring LXi 2.5L Misfire, MIL Lamp on VIN: 4C3AU52N8T
P0300: Multiple Cylinder Misfire Detected. The codes set when on hwy speeds only 60 to 70 mph not all the time code will set and never has come on in town driving. so with a little of your help i hope to find a solid way of confirming what is the problem.I did find a artical on egr sticking but cannot ...
July 30, 2007
2001 Buick Regal LS 3.8L Misfire VIN: 2G4WB55KX1
P0300: Multiple Engine Misfire Detected. At approx 4000 rpms, the motor stumbles and looses power considerably. Idles fine. Test drove vehicle with scanner hooked up. Misfired in cyl 1- 14 times, cyl 4- 6 times, and cyl 6- 4 times, on acceleration. Does the vehicle have a rev limiter at 4000 rpms? Cu...
July 31, 2007
2001 Chrysler Town & Country (Van) Limited 3.8L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 2C8GP64L51
P0300: Misfires random/multiple. ... fuel economy. No CELs @ time of pickup. Within a week and one long trip, customer returned vehicle stating that intermittantly the CEL would come on.(Noted no driveability issues) Code @ that time was P0300. Found nothing...
July 31, 2007