Join Now
International Automotive Technicians Network

P0300 Diagnostic Trouble Code Discussion for November 2004

Multiple Misfire Detected


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

Trouble Ticket Help Requests for DTC P0300
Help Request Posted
1995 Chevrolet Lumina APV 3.8L Poor Idle Quality, Hesitation, Stall VIN: 1GNDUO6L7S
P0300: random misfire. Thanks for reading and hopefully responding to my post. When cold this van starts and runs great for thirty seconds. The first event noticed is the O2 drops from .800 to .040. The IAC opens, fuel pressure responds, grams per second increase and the unit dies u...
November 01, 2004
1996 Volkswagen Jetta GL 2.0L Stall, Misfire VIN: 3VWWA81H9T
P0300: Random misfire. Okay, VW fans, I'll start off by saying that I can only use a Snappy brick in Generic mode...you can all groan in unison now!!! Customer has attempted to repair himself...groan again!!! What I have is a 2.0 that stalls on acceleration right after it reaches o...
November 01, 2004
1999 Buick Century Custom 3.1L Hesitation, Surge, Cuts out, Stall, Misfire, MIL Lamp on VIN: 2G4WS52M5X
P0300: Multiple Engine Misfire Detected. vehicle came to shop for check engine light with stumbling and stalling. placed vehicle on scanner - found trouble code po300. replaced spark plugs and spark plug wires with ac delco. replaced tps. let customer have vehicle back. vehicle back in shop one week ...
November 02, 2004
1998 Chevrolet K1500 Cheyenne 5.7L Excessive Emissions, Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 2GCEK19RXW
P0300: Multiple Cylinder Misfire Detected. This truck has a rough idle all the time. The o2 sensor B2S1 seems to be stuck at 0.35v. LT fuel trim on Bank 2 is 25%. The truck had Bosch wires and uknown cap and rotor on it so we replaced it with AC Delco parts along with a new set of AC Delco plugs. The f...
November 02, 2004
1997 Pontiac Grand Prix SE 3.8L Misfire, MIL Lamp on VIN: 1G2WJ52KXV
P0300: Multiple Engine Misfire Detected. no repair, code sets when in idle or load, cyl one disconnected as well as injector has same misf. or no change at rpms happens intermediatly...replace injector,coil,wire, and spark plug...injector has pulse
November 03, 2004
2000 Ford Taurus SE 4-Valve 3.0L Poor Idle Quality, Hesitation, Surge VIN: 1FAFP55S9Y
P0300: Random misfire detected. ... is possesed with) bucking or surge condition intermittently which I have encountered during the roadtest. Our customer has also stated that it sometimes misses at idle (which I have not experienced). Surge/bucking condition seems to occur mainly when acce...
November 04, 2004
2000 GMC Sierra 1500 SL 5.3L Surge, Misfire, MIL Lamp on VIN: 2GTEK19T41
P0300: Multiple Cylinder Misfire Detected. changed fuel pump fuel pressure reg,plugs& wires,fuel filter surges on ACCELERATION
November 04, 2004
2001 Jeep Cherokee Sport 4.0L Misfire VIN: 1J4FF48S21
P0300: Multiple Cylinder Misfire Detected. Hello everyone, got a silly jeep that won't cooperate. Misfires after a hot soak, sometimes will flag the mil light sometimes not. Fuel pressure is within spec and has lots of flow. It has a coil pack assembly that we have tried a different one to no avail. Fl...
November 04, 2004
1996 Volkswagen Jetta GL 2.0L Stall, Misfire VIN: 3VWWA81H9T
P0300: Random misfire. Okay, VW fans, I'll start off by saying that I can only use a Snappy brick in Generic mode...you can all groan in unison now!!! Customer has attempted to repair himself...groan again!!! What I have is a 2.0 that stalls on acceleration right after it reaches o...
November 04, 2004
2000 Chevrolet Silverado 1500 4.3L Misfire, MIL Lamp on, looses power up hill
P0300: Multiple Cylinder Misfire Detected. customer says happens when going up the same hill everytime.It is a long fairly steep hill.It starts to missfire,then the check engine light comes on,and it starts to loose power.HE says when he comes to a stop it almost stalls then clears up.Unfortunately thi...
November 05, 2004
2000 GMC Sierra 1500 SL 5.3L Hesitation, Surge, Misfire, MIL Lamp on VIN: 2GTEK19T41
P0300: Multiple Cylinder Misfire Detected. THIS VEHICLE SURGES UNDER ACCEL.& UNDER LOAD. HAVE REPLACED FUEL PUMP,FILTER,REG.,SPARK PLUGS & WIRES. CLEANED INJ. WITH MOTOR VAC.REPLACED MAF. RUNS WITHOUT SURGE IN OPEN LOOP UNPLUGGED MAF ALSO RUNS WITHOUT SURGE.WILL ALWAYS SURGE IN CLOSED LOOP UNDE...
November 05, 2004
1997 Pontiac Trans Sport 3.4L Misfire VIN: 1GMDX03E8V
P0300: Multiple Cylinder Misfire Detected. hello all,this vehicle has a constant misfire on cyl.#1.i checked compression it is 150,it has spark,it has fuel.no vac.leaks,i pulled the valve covers and the valve springs look good the rockers look good and work properly,of course i wouldnt have comp.if the...
November 05, 2004
1996 GMC C1500 Sierra SL 4.3L Excessive Emissions, Poor Idle Quality, Hesitation, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 2GTEC19W7T
P0300: Multiple Cylinder Misfire Detected. Hi Pros! After R&R of intake manifold, this baby idles beautifully, but as soon as I rev the engine for a few seconds, it starts to over-fuel and cough and sputter. Horsepower down 50-60% under load. If I leave it alone for 2-3 minutes, idle smoothes right...
November 06, 2004
1998 Oldsmobile Silhouette Premiere 3.4L Excessive Emissions, Misfire, Poor Fuel Economy VIN: 1GHDX03E2W
P0300: Multiple Cylinder Misfire Detected. ... brought this van in with code P0300 set, Customer said when she started it up cold she could feel it miss. Now it runs pretty good except for the fact that the PCM is trying to subtract fuel at idle as noted by the fuel trims. Also noticed on the scan data...
November 06, 2004
1998 Isuzu Rodeo LS 3.2L Hesitation, Cuts out, Misfire, MIL Lamp on VIN: N/A
P0300: Multiple Cylinder Misfire Detected. got a wierd one fellow techs.i have a lean misfire under full load wide open throttle.i have or beleave to have low fuel pressure.my fuel pressure is 32 psi at idle and when i remove the vacuum to regulator it goes to 40 psi.alldata says regulated fuel pressur...
November 09, 2004
1997 Pontiac Trans Sport 3.4L Misfire VIN: 1GMDX03E8V
P0300: Multiple Cylinder Misfire Detected. hello all,this vehicle has a constant misfire on cyl.#1.i checked compression it is 150,it has spark,it has fuel.no vac.leaks,i pulled the valve covers and the valve springs look good the rockers look good and work properly,of course i wouldnt have comp.if the...
November 09, 2004
1996 Porsche 911 Carrera 3.6L Misfire, MIL Lamp on VIN: WPOAA2999T
P0300: Random multiple misfires. Porsche experienced colleagues, this 1996 C4S repeatedly sets the faults mentioned above. It has no performance issues. Freeze frame data shows the short term fuel trim of bank 1 to be -7.84% and the long term is 5.34% when the misfire occurs. The short term f...
November 09, 2004
1998 Isuzu Rodeo LS 3.2L Hesitation, Cuts out, Misfire, MIL Lamp on VIN: N/A
P0300: Multiple Cylinder Misfire Detected. got a wierd one fellow techs.i have a lean misfire under full load wide open throttle.i have or beleave to have low fuel pressure.my fuel pressure is 32 psi at idle and when i remove the vacuum to regulator it goes to 40 psi.alldata says regulated fuel pressur...
November 10, 2004
1997 Chevrolet C1500 4.3L Misfire VIN: 1GTEK14W8V
P0300: Multiple Cylinder Misfire Detected. i group, this truck have an misfire when the rpm reach 2000-2500,and the problem occur on the cruise without an engine load. Misfire on cyl 3-4 and the problem disapear when the engine have a load. The tp is at about 7-10 degres and with the snap shot we can s...
November 11, 2004
1997 Mercury Villager (Van) GS 3.0L No Start, Cuts out, Stall, Misfire, MIL Lamp on, DIES VIN: 4M2DV1114V
P0300: random cyl misfire. after this van is driven or idles for aprox 20-30 minutes it begins to idle rough and dies. idle air controll valve jumps between 60 and 100 when the vehicle is acting up. the timing advance is also jumping between 13 and 35. there is a vacuum leaking sound ( ...
November 11, 2004
2000 Dodge Intrepid 2.7L Misfire VIN: 2B3HD46R1Y
P0300: Multiple Cylinder Misfire Detected. i have this intrepid setting misfire codes. car has no noticeable misfire while driving, but watching the misfire counter on the scanner it shows all 6 cylinders missing only at wide open throttle, right before the shift, but the car runs great. some one else ...
November 12, 2004
2001 Kia Sportage 2.0L Hesitation, Misfire, MIL Lamp on, Both Cats Melted VIN: KNDJB72361
P0300: Random Cylinder Misfire Detected. Now at 137k ses light is on- front cat melted completely and rear cat started to melt. seem like truck is running very lean- we can not duplicate miss fires- we have driven for over 60 miles and ses light does not come on for us- scan tool shows that all syste...
November 13, 2004
2000 Kia Sportage EX 2.0L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: KNDJA7237X
P0300: Random Cylinder Misfire Detected. We changed plugs, coils & wires,(as described in so many submissions) still misfired. Followed all other,(very good advice), pulled and checked all harnesses for cleanliness,contact, position and ability to move/flex with the vehicle, still misfired. Check...
November 15, 2004
2000 Dodge Intrepid 2.7L Misfire VIN: 2B3HD46R1Y
P0300: Multiple Cylinder Misfire Detected. i have this intrepid setting misfire codes. car has no noticeable misfire while driving, but watching the misfire counter on the scanner it shows all 6 cylinders missing only at wide open throttle, right before the shift, but the car runs great. some one else ...
November 16, 2004
2000 Toyota Camry CE 2.2L Cuts out, Stall, MIL Lamp on VIN: 4T1BG28KXY
P0300: Multiple Cylinder Misfire Detected. ... with no restart. The problem started occurring following a timing belt replacement. A week or so after the timing belt job the vehicle returned with a crank sensor code. Inspection found a crank sensor wire pinched to ground under a bracket. The sensor was...
November 16, 2004
2001 Chevrolet Tahoe 5.3L Poor Idle Quality, Misfire VIN: 1GNEC13T31
P0300: Multiple Cylinder Misfire Detected. whats happening is that we have good compression,good fuel pressure,good spark,plugs are fine. it missing on #1 & 7 cly. have good vaccum. 17 in. no noticible signs of vaccum leaks, trying to figure out if the intake gasket could be leaking without no poss...
November 17, 2004
2001 Chrysler PT Cruiser 2.4L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 3C8FY4BB91
P0300: Multiple Cylinder Misfire Detected. this is turning out to be a headache. please help me. customer complains of intermittant chugging while aproaching stop sign, and black smoke from tailpipe. i have never experienced this condition myself. the only condition i have seen is the idle will surge a...
November 17, 2004
2001 Chevrolet Tahoe 5.3L Poor Idle Quality, Misfire VIN: 1GNEC13T31
P0300: Multiple Cylinder Misfire Detected. whats happening is that we have good compression,good fuel pressure,good spark,plugs are fine. it missing on #1 & 7 cly. have good vaccum. 17 in. no noticible signs of vaccum leaks, trying to figure out if the intake gasket could be leaking without no poss...
November 18, 2004
1998 Chevrolet Camaro 3.8L Hesitation, Misfire, MIL Lamp on VIN: 2G1FP22K6W
P0300: Multiple Engine Misfire Detected. Vehicle is missing on #2,5 and 6 cylinders at cold startup. Misfire history is #2-1258, #5-43 and #6-26. We checked for an injector bleeding down by isolating the fuel rail and it only lost about 4 psi. When the supply line, return line and pump were tested it...
November 19, 2004
2001 Saturn L200 2.2L Poor Idle Quality, Misfire VIN: 1G8JU52F41
P0300: Random Misfire Detected. Hello, fellow techs, I have this 2001 Saturn fullsize sedan with a MIL on & a misfire. It has the 2.2 l Ecotec 4 cyl engine. It only misfires at an idle. When the MIL comes on, it does not flash, it just stays on. It feels like the traditional bad spark pl...
November 22, 2004
2000 Volkswagen Golf GL 2.0L No Start VIN: WVWGC31J5X
P0300: random misfire. the car came in for hard start only after initial fill up of gas.it will start every time after. checked for code found the one listed checked fuel pressure and for vacuume leaks replaced vac hose to fuel pressure regulator and retested system all was good or ...
November 26, 2004
1999 Chevrolet Silverado 1500 4.8L Misfire VIN: 2GCE19V9X1
P0300: Multiple Cylinder Misfire Detected. ... DRIVING DOWN THE HIGHWAY, MIL LIGHT WAS ON AND FLASHING. WHEN I DROVE IT VEHICLE RAN FINE, THOUGH MIL LIGHT WAS ON, THEN TURNED OFF. CODE P0300, STORED IN MEMORY. CHECKED FREEZE FRAME DATA LTF TRIM BANK 1 7% LTF TRIM BANK 2 -7%. INJ. PWM AVERAGE BANK 1 12....
November 30, 2004
2002 GMC Sierra 2500 SL 6.0L Long crank time VIN: 1GTGK29U32
P0300: Multiple Cylinder Misfire Detected. Hi Group, Sorry in advance for the long post. This GMC truck has presented a real chalenge. I starts fine cold, and will start fine hot immediatly after it is shut off, but if left to sit for 10 min or longer it will crank for at least 5-10 seconds before sta...
November 30, 2004