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P0300 Diagnostic Trouble Code Discussion for December 2005

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
1997 Chevrolet Astro 4.3L Misfire VIN: 1GNEL19WSV
P0300: Multiple Cylinder Misfire Detected. my conclusion is low fuel pressure under load is causing number six pop it injector to hang up ??? vehicle runs fine untill hard load applied then #six cylender begins to miss also #4 misses but not nearly as bad fuel pressure drops to just below 55 psi and v...
December 01, 2005
2001 Chevrolet S10 4.3L Excessive Emissions, Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GCCS14W61
P0300: Multiple Engine Misfire Detected. pinch off both pressure and return fuel hoses to find system still drops- removed upper intake to find pressure reg. leaking- replaced reinstall intake- runs ruff- misfires- rechecked fue pres. still droping off- removed intake to find all injectors plugged wi...
December 01, 2005
2000 Nissan Maxima GLE 3.0L Hesitation, Surge, Misfire, MIL Lamp on VIN: JN1CA31D3Y
P0300: Multiple Misfire Detected. I am lucky 3rd or 4th shop to look at car. Customer states SES light on for long time (before problem?) and was tuned with in last 6-8 months and last month all new Ox sensors to pass Inspection. Complaint is power loss, believe on highway, with high tachomete...
December 01, 2005
2000 Mercedes-Benz E320 3.2L Misfire, MIL Lamp on VIN: WDBJF652YB
P0300: random misfire. hello everyone out there: i have an e-class that's giving me a hard time. first a brief hist. on it; customer went to dealer complaining of a misfire. they scanned it and found misfire codes on cyl's 2 and 4. so they replaced the spark plugs and the plug wires...
December 05, 2005
1999 Volkswagen Jetta GLS 2.0L Hesitation, Cuts out, MIL Lamp on, LOW POWER VIN: 3VWSC29M5X
P0300: random multiple mis fire. heres what we have, this thing will idle good, and will drive okay once speed is obtained. on acceleration this thing will bog almost to a stop, rpm will not go over 1500 rpm. in nuetral it will rev on light acceleration but during wot it will bog, backfire th...
December 05, 2005
1995 Dodge Neon 2.0L Misfire, MIL Lamp on VIN: 1P3ES47C4S
P0300: multiple misfire. This neon has a cyl going dead randomly. It only happens to cyl. 1 & 4. Not at the same time. It seems to happen on throttle tip in and sometimes at idle. Car will work fine under heavy acceleration. Have read old archives about problems with the wiring ha...
December 06, 2005
2001 Buick Regal LS 3.8L Misfire, MIL Lamp on VIN: 2G4WB55KX1
P0300: Multiple Engine Misfire Detected. thank you in advance for your help. car came in with multiple misfire detected.sold a maintenance tune up injector clean. when you accelerate there is a huge bog like it is running out of gas,i guess the pcm is seeing the misfire and reacting.but number 5 cyl...
December 07, 2005
1996 Nissan 300ZX 2+2 3.0L Misfire VIN: JN1RZ24D4T
P0300: Multiple Misfire Detected. vehicle came in missing,at idle only.runs perfectly down the road.hc 500 ppm at idle. did the spark plugs,cop boots look fine. sometimes idles fine for a minute then engine stutters, sometimes severly.labscope look at the cmp signal looked erratic, replaced di...
December 07, 2005
1998 Pontiac Firebird Firehawk 5.7L Poor Idle Quality, Surge, Stall VIN: 2G2FV22G0W
P0300: Multiple Engine Misfire Detected. I have a cold natured car. It needs a warm blanky, otherwise it does not idle nicely. At ambient temps below 55 degrees farenheit, vehicle will surge the idle, lean misfire most cylinders, no current vacuum leaks found. Vehicle will correct itself @ ECT of 60 ...
December 07, 2005
1998 Chevrolet S10 4.3L Hesitation, Misfire, Poor Fuel Economy VIN: 1GCCS14XXW
P0300: Multiple Engine Misfire Detected. Customer brought this 2wd s10 to our shop for a misfire code (po300).Tech replaced injectors due to other new parts from previous repair shops(new cap-rotor-wires-fuel pump-plugs-cat)Injectors did not fix truck and now its in my lap. The truck when cold exhibi...
December 08, 2005
1999 Chevrolet Silverado 1500 5.3L No Start, VIN: 2GCEK19T8X
P0300: Multiple Cylinder Misfire Detected. this vehicle starts hard after sitting, has 60 lbs fuel pressure, spark and injector pulse but cranks for a long time before starting. If you give it a shot of fuel it seems to help, after it starts it runs rough for a minute, once its running engine has great...
December 08, 2005
1999 Volkswagen Jetta GLS 2.0L Hesitation, Cuts out, MIL Lamp on, LOW POWER VIN: 3VWSC29M5X
P0300: random multiple mis fire. heres what we have, this thing will idle good, and will drive okay once speed is obtained. on acceleration this thing will bog almost to a stop, rpm will not go over 1500 rpm. in nuetral it will rev on light acceleration but during wot it will bog, backfire th...
December 08, 2005
2000 Volkswagen Beetle GLS 1.8L Excessive Emissions, Poor Idle Quality VIN: 3VWCD21C2Y
P0300: random misfire. This car will start fine cold but when left to idle cold it will start to load up, and eventually foul the spark plugs to the point it quits running. It will restart but run poor until the plugs are cleaned. Originally it wouldn't restart and I pulled the plug...
December 12, 2005
1999 Chevrolet Silverado 1500 5.3L No Start, VIN: 2GCEK19T8X
P0300: Multiple Cylinder Misfire Detected. this vehicle starts hard after sitting, has 60 lbs fuel pressure, spark and injector pulse but cranks for a long time before starting. If you give it a shot of fuel it seems to help, after it starts it runs rough for a minute, once its running engine has great...
December 13, 2005
2003 Mazda Protege5 2.0L Misfire, MIL Lamp on VIN: JM1BJ24543
P0300: Multiple Misfire Detected. This Mazda came in with a random misfire that will not consistently reoccur for us in the shop. Since we could not get it to miss, spark plugs and PCV valve were replaced as maintenance with OE parts. Right after this was done, the vehicle missed for approx 10...
December 13, 2005
1997 Chevrolet Monte Carlo Z34 3.4L Poor Idle Quality, Surge, Stall, MIL Lamp on VIN: 2GN4W57XWV
P0300: Multiple Engine Misfire Detected. customer came into my shop with this vehicle several weeks ago. It was towed in as a no start, but the engine would crank. I found that the fuel pressure regulator was leaking and replace it, also had a coolant leak at the throttle body that was leaking into e...
December 14, 2005
2001 Chevrolet Silverado 2500 HD 6.0L Surge, Misfire VIN: 1GCHK24V41
P0300: Multiple Cylinder Misfire Detected. ... code p0300 appear check & replace plug clean injector ,balance test truck run not so much, on road test abiout 65-70 mph truck surge like a gas miss may be my gas pressure is good and delevery too do you think fuel pump may be bad or bad crank sensor ...
December 14, 2005
2001 Jeep Cherokee Sport 4.0L Stall, Misfire, MIL Lamp on VIN: 1J4FF48S91
P0300: Multiple Cylinder Misfire Detected. Hi , every tech .I got this car came to my shop because misfire and check engine on with misfire codes . The customer use this vehicle to plow snow. After plow for an hour ,shut the car down and have a cup of coffee, come back about 10 or 15 minutes restart ca...
December 14, 2005
2003 Mazda Protege5 2.0L Misfire, MIL Lamp on VIN: JM1BJ24543
P0300: Multiple Misfire Detected. This Mazda came in with a random misfire that will not consistently reoccur for us in the shop. Since we could not get it to miss, spark plugs and PCV valve were replaced as maintenance with OE parts. Right after this was done, the vehicle missed for approx 10...
December 14, 2005
2002 GMC Savana 1500 5.7L Misfire, MIL Lamp on VIN: 1GTFG15R32
P0300: Multiple Cylinder Misfire Detected. van came in on the hook customer reports having it at a shop and they replaced the plugs-wires-cap-rotorand fuel filter van ran good on his way home it stalled and would not restart so it was towed in to me i removed the o2 sensors and the van started so we so...
December 15, 2005
1996 Oldsmobile 88 Royale 3.8L Misfire, MIL Lamp on VIN: 1G3HN52K2T
P0300: Engine Misfire Detected. ... and P0300. When you drive the car it will run fine for a few minuets than starts to loose power and will pop occasionally at speed under load.. Like it's lean. I drove the car with my fuel pressure gauge taped tothe winds...
December 18, 2005
1997 Chevrolet Tahoe LS 5.7L Misfire VIN: 1GNEK13R5V
P0300: Multiple Cylinder Misfire Detected. been trying to fix for a week.i have a bad miss on cyl 7 and cyl 2 at times 7 all the time tried changing plugs,wires,cap,rotor still have miss. checked comp its [...] on cyl 7 have done inj balance test all inj tested fine have checked for vac leaks none foun...
December 19, 2005
2001 Ford E-150 Econoline 4.2L Excessive Emissions, No Start, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FTRE1421H
P0300: p0304305306 missfire codes. This vehicle acts like it has a leaking injector with bank 2 running rich, missfires have been cleared, for some reason the egr sol. is not trying to work the egr valve down the road and a heavy pre ignition is herd. engine running without missfire down the ro...
December 20, 2005
2002 GMC Sierra Denali 6.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2GTFK69U32
P0300: Multiple Cylinder Misfire Detected. ... cold start, below 25 degrees. goes away in 2 - 3 minutes of driving . feels like im only dropping 1 cylinder. took scanner and mastertech home on several occasions only to have truck start fine.will only log nonspecific cyl p0300 code. any one know of inje...
December 20, 2005
1993 Dodge B350 5.9L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2B5WB35Z4X
P0300: random cylinder misfire. hi everyone, thanks for looking, the van came in for check engine light & missing problems. we checked on the scope ( master tech 5100 )found it needs to be tuned up, has the original spark plugs, wires, cap, & rotor with 160,000 miles on it. this stil...
December 22, 2005
2002 Pontiac Grand Am SE1 2.2L Misfire, MIL Lamp on VIN: 1G2NF52F32
P0300: Multiple Cylinder Misfire Detected. Hello Techs, Thanks for taking time to read this help message. I have an 02 Grand AM 2.2 ECOTEC that 2-3 ignition coils are not firing. I replaced the solid state ignition coil pack with an AC Delco unit. I still do not have any fire out of 2&3 coil. I hav...
December 22, 2005
1993 Dodge B350 5.9L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2B5WB35Z4X
P0300: random cylinder misfire. hi everyone, thanks for looking, the van came in for check engine light & missing problems. we checked on the scope ( master tech 5100 )found it needs to be tuned up, has the original spark plugs, wires, cap, & rotor with 160,000 miles on it. this stil...
December 23, 2005
2001 Jeep Cherokee Sport 4.0L Stall, Misfire, MIL Lamp on VIN: 1J4FF48S91
P0300: Multiple Cylinder Misfire Detected. Hi , every tech .I got this car came to my shop because misfire and check engine on with misfire codes . The customer use this vehicle to plow snow. After plow for an hour ,shut the car down and have a cup of coffee, come back about 10 or 15 minutes restart ca...
December 23, 2005
2001 Nissan Xterra SE 3.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 5N1ED28Y71
P0300: Multiple Misfire Detected. Beating myself up to fix someelses problem Help. Thanks in advance.
December 23, 2005
2002 Chevrolet Silverado 1500 4.3L Misfire, MIL Lamp on VIN: 1GCEK14W72
P0300: Multiple Cylinder Misfire Detected. trk idles perfect no load at 1500 rpm and up has missfire on cyl 3 & 4 plugs are gas fouled on cyl 3&4 at full throttle no miss no other codes no other problems HELP!!!
December 28, 2005
1997 Chevrolet C1500 4.3L No Start VIN: 1GCEC14W5V
P0300: Multiple Cylinder Misfire Detected. Have lots of fuel and spark at plugs. Plugs foul out as soon as key turned on. It does not even try to start. Customer has tried AC Delco crank sensor and ignition/coil control module as well as new coil. I don't like crk sensor signal strength but it may not ...
December 29, 2005
2001 Chevrolet Silverado 1500 4.8L Hesitation, Misfire, MIL Lamp on VIN: 2GCEC19V61
P0300: Multiple Cylinder Misfire Detected. this vehcle came in for missfires under load, has lots of miles, inside the throttle body i could see lots of build up so i performed a bg induction clean, also a fuel injection service , vehicle seems to have huge spark knock at cruise, fuel pressure seems to...
December 29, 2005
2003 Hummer H2 6.0L Misfire VIN: 5GRGN23U43
P0300: Multiple Cylinder Misfire Detected. Hi all, Thanks in advance for any help, this Hummer H2 is misfiring on bank 2. Cylinders 2,4,6,8 are showing misfires on our scan tool and this vehicle runs like it too. The fuel pressue is 55 lbs. the compression is 125-130 lbs all the way across, we have s...
December 29, 2005