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P0300 Diagnostic Trouble Code Discussion for June 2011

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
2003 Chevrolet Silverado 1500 SS 6.0L Hesitation, Misfire VIN: 2GCEK19N23
P0300: Multiple Cylinder Misfire Detected. This vehicle idles rough but the major concern is lack of power, ses on, I have misfires on 2,4,6,8 cylinders heaviest on 6, feels like the exhaust is restricted but the converter temp seems to be about the same side to side, misfire gets very severe under loa...
June 01, 2011
2001 Chrysler PT Cruiser 2.4L Misfire VIN: 3C8FY4BBX1
P0300: Multiple Cylinder Misfire Detected. ... and answer my help request. I have had this pt cruiser for about 3-4 weeks now. It came in for a check engine light(code p0300). I looked it over and did my normal routen for misfires. The misfires seem to happen when you are on light accel or holding the...
June 01, 2011
1997 Mazda 626 LX 2.0L MIL Lamp on VIN: 1YVGE22C8V
P0300: Random Misfire Detected. ... The initial complaint is failing California smog inspection for MIL on. Passed tailpipe portion of test. Customer had failed at another shop a month prior to coming to my shop for consumer assistance repairs. During the time in between shops, she had her ...
June 01, 2011
2006 Other GM h3 3.5L Misfire, MIL Lamp on VIN: 5GTDN13626
P0300: missfire. this veh. arrived with missfire,seems to be a vacuum issue,cant find any leaks.any ideas? thanks
June 01, 2011
1997 Mazda 626 LX 2.0L MIL Lamp on VIN: 1YVGE22C8V
P0300: Random Misfire Detected. ... The initial complaint is failing California smog inspection for MIL on. Passed tailpipe portion of test. Customer had failed at another shop a month prior to coming to my shop for consumer assistance repairs. During the time in between shops, she had her ...
June 03, 2011
2007 Chevrolet Express 3500 6.0L MIL Lamp on, P0300 VIN: 1GBJG31UX7
P0300: Multiple Cylinder Misfire Detected. ... engine lamp flashes and sets p0300. We cannot 'feel' any misfires but misfires show up on scan tool. Mostly #7, but other cylinders at random will show misfires. We have switched coil,wire, plugs, injector,removed and cleaned fuel rail.removed cylinder hea...
June 06, 2011
2000 Chevrolet Express 3500 7.4L Misfire, MIL Lamp on VIN: 1GBJG31J9Y
P0300: Multiple Cylinder Misfire Detected. ... motorhome 7.4 engine with a check engine light on. check codes code p0300 random cyl. misfire found #1 cylinder showing misfires and #8 showing some misfire counts but not as much. Scoped tested vehicle found that plug wires had high resistance, check fuel...
June 07, 2011
2003 Chevrolet S10 4.3L Poor Idle Quality, Hesitation VIN: 1GCDT13X73
P0300: Multiple Engine Misfire Detected. After the hard miss was fixed by the tune up the low power issue is still present. The truck will barely pull on to a drive-on lift. Power braking (push both brake and throttle to the floor) the engine won't go over 1000 rpm. I scoured IATN and found that so...
June 07, 2011
2007 Dodge Caliber SE 1.8L Misfire VIN: 1B3HB28C67
P0300: Multiple Cylinder Misfire Detected. There is a definite misfire going on but have not had the issue of code PO00B before which is the variable valve timing phase issue. The oil was extremely dirty which I guess can cause some problems with the solenoid, change oil and filter and no change. Other...
June 07, 2011
1998 Chevrolet Malibu 2.4L Misfire VIN: 1G1ND52T4W
P0300: Multiple Cylinder Misfire Detected. Hello Fellow techs, i have a headache on my hands. Vehicle came in running rough and missfiring on cylinders 1 and 3 my first thought was coil tower so i replaced it, still doing it then i thought coils so i replaced coils and, still missfires so i went a litt...
June 09, 2011
2001 Mitsubishi Montero Sport XLS 3.0L Poor Idle Quality, Hesitation VIN: JA4LS31HX1
P0300: Random Misfire Detected. Came in from unknown. Customer was told bad catilitic converter. Has no power and tends to lightly backfire through intake while reving in park. When creating a flood condition b1 mv react as expected (.960 to .980) with no activity on bank 2. After it sits fo...
June 09, 2011
2007 Chevrolet Equinox LS 3.4L MIL Lamp on VIN: 2CNDL13F07
P0300: Engine Misfire Detected. Hi hope to get some help on this one has a po300 but cylinder 6 is missing more then the rest moved wire plug no change even changed the wires on the coil no change number 6 misses. counts miss all the time do i have a vacuum leal like the old style or a bad i...
June 13, 2011
2000 Chevrolet Astro 4.3L Misfire, MIL Lamp on VIN: 1GKDM19WXY
P0300: Multiple Cylinder Misfire Detected. This is a good customer of mine and a vietnam vet, dont want to let him down. He has spent a ton of money on this thing and I have donated way too much time. Any help with this vehicle will be greatly appreciated. I am a lone mechanic starting my own shop, nee...
June 14, 2011
2000 Chevrolet Astro 4.3L Misfire, MIL Lamp on VIN: 1GKDM19WXY
P0300: Multiple Cylinder Misfire Detected. This is a good customer of mine and a vietnam vet, dont want to let him down. He has spent a ton of money on this thing and I have donated way too much time. Any help with this vehicle will be greatly appreciated. I am a lone mechanic starting my own shop, nee...
June 15, 2011
2000 Oldsmobile Intrigue GL 3.5L Misfire, MIL Lamp on VIN: 1G3WS52H6Y
P0300: Multiple Cylinder Misfire Detected. This Car will intermitantly start to missfire it doesn't happen very often if you just start it up and let it idle but if you take it for a drive around the block it will start to miss heavily but only when you come to a stop and let it idle. It will continue ...
June 15, 2011
2006 Chrysler 300 (Car) Limited 3.5L Stall VIN: 2C3KA53G56
P0300: Misfire detected. Customer wife complains that on occasion car attacks up and does not to go. I could not duplicated and neither the husband until yesterday. Husband drove the car home. Got some gas, went to Seven 11 and went to get on RT 22 and the car dumped. Stayed running b...
June 17, 2011
2006 Chrysler 300 (Car) Limited 3.5L Stall VIN: 2C3KA53G56
P0300: Misfire detected. Customer wife complains that on occasion car attacks up and does not to go. I could not duplicated and neither the husband until yesterday. Husband drove the car home. Got some gas, went to Seven 11 and went to get on RT 22 and the car dumped. Stayed running b...
June 18, 2011
2000 Mercedes-Benz C230 Kompressor 2.3L Excessive Emissions, MIL Lamp on, VIN: WDBHA24G6Y
P0300: random history. original complaint was eng lite-was only air inj at time,year ago..since then, has had misfire along with air code. replaced plugs, air check valve, checked vac lines and coil boot-all appear OK.. now what happens is slight misfire at start after sitting overn...
June 20, 2011
1999 GMC Yukon Denali 5.7L Poor Idle Quality, Misfire VIN: 1GKEK13R6X
P0300: Multiple Cylinder Misfire Detected. ... long enough, here goes. I have a 99 Yukon with Vin R 5.7L. It came in with intake gaskets leaking into crankcase; replaced with steel fel-pro set and set cam retard to 0 degrees, trucj ran like a champ. That was on thursday, customer picks up vehicle on Mo...
June 21, 2011
2000 BMW 323i 2.5L MIL Lamp on VIN: WBAAN3344Y
P0300: Random misfiring. ... for codes P0300, P1188 & P1189, replace Crank case valve took care P0300, replace V/C & intake gaskets and Intake runner valve brought Short trim down at idle -1 but Long trim 11.7, driving 60MPH LTrim & STrim at 10-14. and codes P1188, P1189 a...
June 22, 2011
2004 Lexus RX330 3.3L Misfire, MIL Lamp on VIN: JTJGA31U14
P0300: Multiple Cylinder Misfire Detected. ... brought in after it was serviced at a car wash/lube center. They did a coolant,radiator flush and a fuel system service. The check engine light came on, she took it back and they cleared the codes which came back on shortly afterwards. When it came here I ...
June 22, 2011
2001 Nissan Xterra SE 3.3L Hesitation, Cuts out, Misfire VIN: 5N1ED28Y91
P0300: Multiple Misfire Detected. Vehicle came in to shop with check enginelight on scanned and found codes. Checked out mass air flow sensor as per instructions on modus. All checked out fine. Checked out injectors and all seem good and are clicking evenly. Test drove vehicle and all was good...
June 23, 2011
2005 Ford F-350 Super Duty XL 5.4L Misfire VIN: 1FDWF37559
P0300: Random Misfire Detected. Does any one know what is a good fuel pressure for this truck mitchell said 28 - 44 and Ford dealer said 55 psi I have 32 to 43 psi
June 24, 2011
2007 Jeep Grand Cherokee Limited 4.7L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1J8HS48P47
P0300: Multiple Misfire Detected. Hello everyone, First start off with i hate this jeep, lol. Jeep first came to me about a month ago running rough had a intermiten misfire and a ck eng light on. Scanned pcm and retrived p0305. after switching coils the misfire changed location with coils. r...
June 25, 2011
2004 Chevrolet Tahoe LT 5.3L Misfire VIN: 1GNEC13Z44
P0300: Multiple Cylinder Misfire Detected. ... engine started misfiring with a p0200 and p0300 fuel pressure is good coils good the misfire was on #5and #3 i switched the injector from #5 to#1 and now i have a miss on #1 so i put a new injector in #1 and still have the same misfire any help would be gr...
June 26, 2011
2004 Chrysler Sebring 2.7L No Start VIN: 1C3EL55R04
P0300: Multiple Cylinder Misfire Detected. Car has spark, Starts and runs on starting fluid. changed out fuel pump. Can not communicate with computer with snap on scanner. can pull codes with code reader only. Cant get to injectors to check, but am guessing no inj pulse. Changed relays arround.
June 27, 2011
1999 Honda Accord EX 2.3L MIL Lamp on VIN: JHMCG6672X
P0300: Multiple Misfire Detected. This vehicle has the MIL flashing as soon as you start to drive it, and sets misfire codes for #1, #2. The strange thing is the vehicle is not actually misfiring. It revs nice and smooth with any trouble. Once the MIL starts flashing it doesnt stop until you s...
June 27, 2011
2002 Jeep Grand Cherokee Limited 4.7L Misfire, MIL Lamp on VIN: 1J8GW58N52
P0300: Multiple Cylinder Misfire Detected. ... with this one. I have a 4.7 grand cher. that keeps on kicking misfire codes. Plugs have been done, motorvac, checked all coils and all injectors, smoked engine, verified fuel pressure. Using the Drb I can get all the cylinders to register a misfire. You ca...
June 28, 2011
2008 Chrysler Town & Country (Van) LX 3.3L Cuts out VIN: 2A8HR44H78
P0300: Cylinder Misfire Detected- Stored Code. Intermittently while driving the engine cuts out briefly and sets the listed codes. Happens more often when you first start accelerating or when you accelerate as if to pass someone although it will do it at a steady speed and at idle (just dies if sitting at ...
June 29, 2011
2004 Isuzu N NPR 6.0L Misfire, MIL Lamp on VIN: 4KLB4B1U54
P0300: Misfire. Vehicle has code p0300, cylinders 7 and 8 were misfiring at first. When watching all cylinders on scan tool misfire switched to cylinders 2 and 6. We have smoke tested / sprayed down intake manifold for possible leaks, switched injectors, coils and spark plugs...
June 29, 2011
2002 Jeep Grand Cherokee Limited 4.7L Misfire, MIL Lamp on VIN: 1J8GW58N52
P0300: Multiple Cylinder Misfire Detected. ... with this one. I have a 4.7 grand cher. that keeps on kicking misfire codes. Plugs have been done, motorvac, checked all coils and all injectors, smoked engine, verified fuel pressure. Using the Drb I can get all the cylinders to register a misfire. You ca...
June 29, 2011