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P0300 Diagnostic Trouble Code Discussion for October 2008

Multiple Misfire Detected *

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Trouble Ticket Help Requests for DTC P0300

	Help Request	Posted
	1999 Honda Accord EX 3.0L Stall, Misfire, MIL Lamp on VIN: 1HGCG225XX P0300: Multiple Misfire Detected. Vehicle has all cylinders misfiring randomly ICM checks ok,coil ok, all power and grounds good,	October 01, 2008
	1996 Ford E-150 Econoline 5.8L Hesitation, Misfire, MIL Lamp on VIN: 1FMEE11H8T P0300: Random Missfire. ... engine would ocaisionaly be hard to start/starter turn slowly. and 2) it often mildly hesitated under load in mornings for first 20 minutes or so. Other system repairs were also requested if engine was found sound. Initially tested for cylinder head / gas...	October 02, 2008
	1999 Honda Accord EX 3.0L Stall, Misfire, MIL Lamp on VIN: 1HGCG225XX P0300: Multiple Misfire Detected. Vehicle has all cylinders misfiring randomly ICM checks ok,coil ok, all power and grounds good,	October 02, 2008
	2002 Nissan Frontier SE 3.3L No Start, Poor Idle Quality, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1N6ED29YO2 P0300: Multiple Misfire Detected. vehicle was towed in with two broken cats and very worn tune up parts replaced tune up parts and cats. road tested vehicle 6 miles ran great then stalled,vehicle restarted and would not accelerate as if it was out of fuel, reconnected fuel pressure tester foun...	October 02, 2008
	1996 Oldsmobile Cutlass Supreme 3.1L Surge, MIL Lamp on VIN: 1G3WH12M5T P0300: Multiple Engine Misfire Detected. Car came in with complaint of idle surge after hot restart and SES light on.First time in shop car had a Random Misfire code and EGR position error code.Car had a "Lopey" idle for 5-10 seconds after hot restart and then cleared up.I have seen a number ...	October 02, 2008
	2001 Oldsmobile Alero GL 2.4L Misfire VIN: 1G3N152T71 P0300: Multiple Cylinder Misfire Detected. This vehicle came in with a misfire cause by the ignition housing. When the housing was replaced the misfire went away, for a short time only to burn through a second and third housing. After the second housing was replaced the module and both coils were repla...	October 02, 2008
	1996 Chevrolet K1500 Suburban 5.7L MIL Lamp on VIN: 3GNFK16R9T P0300: Multiple Cylinder Misfire Detected. SES light intermittent p0300. Can not feel it, but can watch misfire monitors. All cylinders will show mis at random, but primary cylinders 2&3. We have ran relative compression test is even. Have blocked off EGR valve to eliminate. Cam retard at 0.	October 03, 2008
	1999 Chevrolet K1500 Suburban 5.7L Excessive Emissions, Poor Idle Quality VIN: 3GNFK16R2X P0300: Multiple Cylinder Misfire Detected. THANKS IN ADVANCE this suburban idles rough - not really rough but every 3 months or so it will throw a po300. this time the misfire monitors were hi on 7, 3, and 4. 1234-2344 misfires. Freeze Frame is recorded at idle. i can drive this thing down the road and...	October 03, 2008
	1998 GMC K1500 Sierra SL 5.7L Surge, Misfire VIN: 1GTEK19R8W P0300: Multiple Cylinder Misfire Detected. To all; I have this GMC with what feels like a surge or misfire. It happens on very light throttle during steady speed operation or very slight acceleration, slightly worse after a hard accel. but runs o/k during a hard accel. Feels like a soft misfire or surg...	October 06, 2008
	2005 Kia Optima LX 2.4L No Start, Stall, MIL Lamp on VIN: KNAGD12625 P0300: Random Cylinder Misfire Detected. This vehicle had the valves replaced and timing belt. After a week the customer brought it back for a stalling then no start prob. I found the dtc P0335 and found the cam sensor and connector bad. I repaired the connector and replaced the cam sensor. Intermitt...	October 06, 2008
	1999 Chevrolet Malibu LS 3.1L Hesitation, Surge, Misfire VIN: 1G1NE52J3X P0300: Multiple Cylinder Misfire Detected. This vehicle has a severe sag, chuggle, misfire on acceleration from a stop. This occurs only when the engine is cold and in open loop. After it goes into closed loop, it runs fine. I checked for vacuum leaks (none found), I also checked the air tube from the ...	October 08, 2008
	2005 Chevrolet Silverado 2500 HD 6.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GCHC24U95 P0300: Multiple Engine Misfire Detected. ... on and engine overheating. Found to have a bad fan clutch and evap vent valve--replaced and retested good. Now on to the Random missfire P0300. Miss fire detected on all cylinders, fuel trims look good, no vacuum leak fro...	October 08, 2008
	2004 Mitsubishi Endeavor XLS 3.8L MIL Lamp on VIN: 4A4MN31S14 P0300: Cylinder 1 Misfire Detected. ... misfire. The coil had no spark output. I replaced and all was well except the MIL wouldn't go out until I disconnected the battery. 500 miles later it comes back with a P0300 random multipul cyl misfire. Freeze frame shows the code was set 84 MPH temps nor...	October 09, 2008
	2004 Mini Cooper S 1.6L Misfire VIN: WMWRE33434 P0300: very intermitant missing running bad. ... p0304, could not verify complaint. Replaced plugs and wires and car came back with same customer symptoms, running bad and missing, two weeks later. By the time it came back the problem cleared up and has p0300 random misfire. all scan data looks ok at thi...	October 10, 2008
	1998 Nissan Pathfinder LE 3.3L No Start VIN: JN8AR05S4W P0300: Multiple Misfire Detected. car won't run with fuel pump relay in but will run fine jumping pins 3 and 5 for the pump. we have tried several relays. we have power at pin 2 also and continuity at pin 1 to ecm. are thoughts is leading towards ecm, because we are thinking were not getting t...	October 10, 2008
	1997 Plymouth Grand Voyager SE 3.3L Stall, Misfire VIN: 2P4GP44R8V P0300: Multiple Cylinder Misfire Detected. This vehicle will intermittently misfire and sometimes the ignition coil module with short out blowing the 20 amp engine fuse. The module will be cracked near the #3 coil area. The module will have to be replaced to start again. It has happened 3 times. Wiring...	October 13, 2008
	2001 Chevrolet Blazer LS 4.3L Misfire, MIL Lamp on VIN: 1GNDT13W91 P0300: Multiple Cylinder Misfire Detected. this truck is crazy I don't feel misfire but it shows up on tech 2 miss on cyl 1,4 Number has the most misfire. I checked the dist gear for wear been replaced. I smoked checked intake system ok. The scope pattern looks good. I tried a plug wire. I hear guy say...	October 14, 2008
	2003 Cadillac DeVille 4.6L Poor Idle Quality, Stall, Misfire VIN: 1G6KD54Y83 P0300: Engine Misfire Detected. G.M. Techs your knowledge is needed.I have lost my --- on this one. Did have a bad vaccum leak,quick bucks, yea right 5 days later,1-3-5-7 missing randomly,compression chk. all above 140. Found T.S.B. on reprogram called dealer been done, hoping to pawn it on ...	October 15, 2008
	1999 Honda Accord EX 2.3L Poor Idle Quality VIN: 1HGCG65851 P0300: Multiple Misfire Detected. Hello all and thanks in advances for reading this this car is running badly on cold starts only, let it run for abit and it smoothes right out. When its running badly my vacume gauge is at 10" and needle is bouncing around like a valve issue. You can see c...	October 16, 2008
	1998 Chevrolet Lumina 3.8L Poor Idle Quality, Misfire VIN: 2G1WL52K2W P0300: Multiple Engine Misfire Detected. Howdy, working on this 98 chev. lumina 3.8k engine code, runs rough and misses at idle,no abnormal noises or other driveability complaints, cylinder balance test and missfire counter on scan tool confirms miss on #1 cylinder, miss goes away when throttle is cr...	October 17, 2008
	1996 GMC K1500 Sierra SL 5.7L Poor Idle Quality, Misfire VIN: 1GTEK14R2T P0300: Multiple Cylinder Misfire Detected. this vehicle came to me with all new ignition parts and a new # 5 fuel injector. # 5 cylinder misfires only at idle, you can watch it on the tech 2 scanner, above 2000 rpm it starts to fire ok. it runs great on the road. i suspect a vacuum leak, but all tests ...	October 18, 2008
	1997 Mercedes-Benz E420 4.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: WDBJF72F2V P0300: Random misfire detected. without a star machine im alittle perplexed. cyliders misfire on bank one only. when the vehicle arrived it had champion copper plugs in it. naturally i replaced them with bosch plats. scoped coils, no faults. scoped injectors, no faults. swapped coils and inj...	October 18, 2008
	1996 Chevrolet K3500 7.4L MIL Lamp on VIN: 1GBJK34J5T P0300: Multiple Cylinder Misfire Detected. ... exclusively a Ford shop but we have a 96 3500 series 7.4 in our fleet that runs like a 'swiss watch' at all throttle angles/loads.. We're trying to get thing past CA smog to sell/auction it, but it keeps setting P0300 for a Random Misfire.. We weren't sure...	October 20, 2008
	2003 Cadillac DeVille 4.6L Poor Idle Quality, Stall, Misfire VIN: 1G6KD54Y83 P0300: Engine Misfire Detected. G.M. Techs your knowledge is needed.I have lost my --- on this one. Did have a bad vaccum leak,quick bucks, yea right 5 days later,1-3-5-7 missing randomly,compression chk. all above 140. Found T.S.B. on reprogram called dealer been done, hoping to pawn it on ...	October 21, 2008
	1996 Chevrolet K3500 7.4L MIL Lamp on VIN: 1GBJK34J5T P0300: Multiple Cylinder Misfire Detected. ... exclusively a Ford shop but we have a 96 3500 series 7.4 in our fleet that runs like a 'swiss watch' at all throttle angles/loads.. We're trying to get thing past CA smog to sell/auction it, but it keeps setting P0300 for a Random Misfire.. We weren't sure...	October 21, 2008
	2003 Chevrolet Express 3500 6.0L Misfire, MIL Lamp on VIN: 1GBHG31U33 P0300: Multiple Cylinder Misfire Detected. ... light codes p0300 multiple cyclinder miss fire and code p0340 catalytic effiency bank 2 check cat post o2 sensor voltage varrying from 200 to 800 mv same as pre o2 sensor we are recommending cat. check code p0300 check m...	October 21, 2008
	2002 Chrysler PT Cruiser 2.4L Hesitation, Surge VIN: 3C4FY48B32 P0300: Multiple Cylinder Misfire Detected. This car run fine at idle when you whant to accelerate it misse and engine w'ont rev up,when we go on the road as soon as we push on the gas it beguin to miss on all cylinders we release the gas and it run really fine. removed the cat, removed the fuel rail an...	October 23, 2008
	2005 Nissan Maxima SL 3.5L MIL Lamp on, false misfires VIN: 1N4BA41E95 P0300: Multiple Misfire Detected. Hey guys.. have an 05 maxima that turns mil on and then flashes mil as type 1 misfire although vehicle drives and runs perfect. followed tsb for inj res check,ohm out good hot or cold. suspect pcm or software programming flash needed, anyone seen this before, ...	October 24, 2008
	1999 Pontiac Montana 3.4L Misfire, MIL Lamp on VIN: 1GMDX03EXX P0300: Multiple Cylinder Misfire Detected. Van has code p0300, with scan tool number 5 cyl is the one missing. Miss is intermittant and mostly at idle. Noid light and spark tester never misses a beat on #5 cylinder, but with everything hooked up and engine running #5 has intermittant miss, engine warm ...	October 24, 2008
	2005 Jeep Grand Cherokee Limited 4.7L Poor Idle Quality, Misfire VIN: 1J4HR58N95 P0300: Multiple Cylinder Misfire Detected. ... with a rough idle, MIL light on with misfire codes and a B-1 downstream fuel system lean code. The vehicle will set either a random misfire or cyl 1,3 or 5 at idle only and the p2096 code after a 3 to 5 minute highway cruise after you decel and idle for ab...	October 27, 2008
	2000 Honda Passport EX 3.2L Misfire, MIL Lamp on VIN: 4S6DM58W4Y P0300: Random Misfire Detected. This Honda was brought to us after multiple shops have had their hands on it. From what we can tell there has been a salvage yard engine installed. The MIL will flash when ever you get over 2000 RPM, but does not always store any codes. I have seen it throw a ...	October 28, 2008
	2002 Chrysler PT Cruiser 2.4L Hesitation, Surge VIN: 3C4FY48B32 P0300: Multiple Cylinder Misfire Detected. This car run fine at idle when you whant to accelerate it misse and engine w'ont rev up,when we go on the road as soon as we push on the gas it beguin to miss on all cylinders we release the gas and it run really fine. removed the cat, removed the fuel rail an...	October 30, 2008