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P0300 Diagnostic Trouble Code Discussion for June 2010

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
2003 Chevrolet Silverado 1500 5.3L Poor Idle Quality, Surge, Misfire VIN: 2GCEK19TX3
P0300: Multiple Cylinder Misfire Detected. I know there are a lot of posts for similar issues, but I cannot find one that matches what I've got. This really feels to me like the EGR valve is stuck open at idle, except it's not a California car, and has no EGR valve. I know my problem is linked in some ...
June 01, 2010
2003 Chevrolet Silverado 1500 5.3L Poor Idle Quality, Surge, Misfire VIN: 2GCEK19TX3
P0300: Multiple Cylinder Misfire Detected. I know there are a lot of posts for similar issues, but I cannot find one that matches what I've got. This really feels to me like the EGR valve is stuck open at idle, except it's not a California car, and has no EGR valve. I know my problem is linked in some ...
June 02, 2010
2001 Jeep Grand Cherokee Laredo 4.0L MIL Lamp on VIN: 1J4GX48S51
P0300: Multiple Cylinder Misfire Detected. Thank you in advance for your help. This car has a mil with multiple misfire codes. Car runs OK, but over 3500 rpm mil will start flashing. In addition to the multiple misfire codes, when we view the freeze frame, it shows rpm at 0 and map at 0, and we don't ...
June 02, 2010
2008 Jeep Grand Cherokee Limited 4.7L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1J8HR58N58
P0300: Random misfire. ... leaks. None found. Observed O2 readings in my solus pro scan tool and O2 readings are close to desired voltage. Most of the time it is pretty smooth. At other times appears to have a dead miss. Cannot pinpoint any cylinder. Cyl.7 seems the worst and is the...
June 02, 2010
1999 Audi A6 Quattro Avant 2.8L Misfire VIN: WAUDA24B4X
this vehicle runs good most of the time bu intermittently it will misfire very severly. I have duplicated problem after driving and coasting for a bit the it will misfire but as soon as rpm go up misfire cleares up and engine will run fine this does not happen...
June 04, 2010
1996 Chevrolet C1500 Silverado 5.7L Misfire VIN: 1GCEC19R6T
P0300: Multiple Cylinder Misfire Detected. I have this vehicle in the shop and it has a rather constant misfire on cyl 5 according tto the scanner. Fuel pressure good,secondary ignition looks fine on scope,no vacuum leaks, swapped pllug with no change,suspecting fuel injector. but jumped injector with ...
June 04, 2010
1999 Audi A6 Quattro Avant 2.8L Misfire VIN: WAUDA24B4X
this vehicle runs good most of the time bu intermittently it will misfire very severly. I have duplicated problem after driving and coasting for a bit the it will misfire but as soon as rpm go up misfire cleares up and engine will run fine this does not happen...
June 05, 2010
2004 Jeep Liberty Sport 3.7L Misfire VIN: 1J4GL48K74
P0300: Multiple Misfire Detected. hello ladyes And gentelmen i have a jeep with multiple codes for misfire and coil drivers on 3 cylinders swaped out coils with known good ones and still have concern compression test all cylinders average 150 psi all also have 130 running compression installed...
June 06, 2010
1999 Acura TL 3.2L MIL Lamp on VIN: JH41A9656X
P0300: Multiple Misfire Detected. ... time back after above fixes.P0300 code custermer states that TCS light came on too.Frezze frame says 61 mph when happned 2200 rpm. Ive driven it and cleared out codes and cant reproduce miss. Custermer picks up then happens again. this time he said he did ...
June 07, 2010
2002 Chevrolet Express 1500 5.7L MIL Lamp on VIN: 1GBFG15R52
P0300: Multiple Cylinder Misfire Detected. ... knocking. We installed a new reman engine, new plugs, wires, cap and rotor at that time. When we started it we had a P0300 random misfire code pretty much immediately. Cylinder 4 and 7. Performed Fuel pressure test and found FP at 54psi. Replaced fuel pump...
June 07, 2010
2003 Chevrolet Impala LS 3.8L Stall VIN: 2G1WH52K63
P0300: Multiple Cylinder Misfire Detected. hi i have a 03 impala 3,8 that starts and then shuts off after 4 seconds of run time.only has a history code po300 cylinder missfire.has no present code.hope someone has had this problem before and can help me. thanks jim
June 08, 2010
2000 Chevrolet Silverado 2500 LS 6.0L Poor Idle Quality, Hesitation, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GCFC29U8Y
P0300: Multiple Cylinder Misfire Detected. ... due to engine misfire. Got codes po158, po300, po171 and p0405. When the engine goes into closed loop, the engine will misfire on number 2,4,6, and 8 which is one bank. Number 1,3,5,7 has no misfire at idle. Replace the oxygen sensor on bank 2 sensor 2 and...
June 09, 2010
2001 Mitsubishi Eclipse Spyder GT 3.0L No Start, Cuts out VIN: 4A3AE55H81
P0300: Random Misfire Detected. This car has high fuel pressure due to a plugged regulator and return line. In the process of fixing this. The main problem is that the pcm is not sending a ground control signal to the fuel pump relay. Before i replace the pcm i am trying to find out what the...
June 09, 2010
2005 Chrysler PT Cruiser GT 2.4L Misfire VIN: 3C3AY75S45
P0300: Multiple Cylinder Misfire Detected. This vehicle comes complete with the 2 codes listed. It does have an intermittant misfire at idle and will show the misfire on the scan tool as being #2. Have moved plugs, wires and changed ignition coil to no avail. Compression is good on all cylinders at 140...
June 10, 2010
2001 Mitsubishi Eclipse Spyder GT 3.0L No Start, Cuts out VIN: 4A3AE55H81
P0300: Random Misfire Detected. This car has high fuel pressure due to a plugged regulator and return line. In the process of fixing this. The main problem is that the pcm is not sending a ground control signal to the fuel pump relay. Before i replace the pcm i am trying to find out what the...
June 12, 2010
1999 Isuzu Rodeo S 2.2L Misfire VIN: 2Z13A54031
P0300: Multiple Cylinder Misfire Detected. This engine was taken out of a deawoo laganza with only 67000 miles on it. It ran great in the car but now that its in this rodeo, it doesnt run good at all. The exact discription of how it feels is it is like driving a car with bad plug wires down the road du...
June 13, 2010
2002 Dodge Ram 2500 Van 5.2L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire, Poor Fuel Economy VIN: 2B7JB21Y02
P0300: Multiple Cylinder Misfire Detected. this van came in with a misfire under accleration and backfiring threw the intake, idles fine. wont acclerate over half throtleit will stall out and take a while to restart. i checked fuel presure running and it is 50psi and never is under 45 psi. i checked th...
June 14, 2010
2004 Ford E-350 Super Duty 5.4L Misfire, MIL Lamp on VIN: 1FDWE35L14
P0300: Random Misfire Detected. Ok guys, i'm not the best driveability guy out there, and this ones got me stumped. This is a minibus that sits at idle a lot. It came to me running fine but when i let it sit at idle after 10 or 15 minutes it starts to missfire and the fuel trim goes up to 22...
June 14, 2010
2002 Dodge Ram 2500 Van 5.2L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire, Poor Fuel Economy VIN: 2B7JB21Y02
P0300: Multiple Cylinder Misfire Detected. this van came in with a misfire under accleration and backfiring threw the intake, idles fine. wont acclerate over half throtleit will stall out and take a while to restart. i checked fuel presure running and it is 50psi and never is under 45 psi. i checked th...
June 15, 2010
2002 Mazda Miata 1.8L Hesitation, Cuts out, Misfire, MIL Lamp on VIN: JHM1NB3533
P0300: Random Misfire Detected. See *related repair history, sorry, put all of it in one catagory. duh!
June 15, 2010
2000 Hyundai Tiburon 2.0L Hesitation, Misfire, MIL Lamp on VIN: KMHJG25F37
P0300: Multiple Misfire Detected. ... with P0300, P0301, P0303, P0304 codes set in memory. On a test drive we noticed a slight missfire under 3000rpm right at part to wide open throttle at take off under a load, such as taking off from a stop light. Brought the...
June 17, 2010
2006 Chevrolet Malibu Maxx SS 3.9L Misfire VIN: 1G1ZW63186
P0300: Multiple Engine Misfire Detected. this car has a miss on cyl 6 some misses on 2 and 4 . most of this is in mid warmup . is ok for the first 30 sec. then the the miss starts, goes to a dead miss on 6.after 30 min or so it will go to a slight miss.moved inj#6 to #4 no change on 6.moved inj wire ...
June 21, 2010
2000 Chevrolet Silverado 1500 4.3L Misfire, MIL Lamp on VIN: 1GCEK14WXY
P0300: Multiple Cylinder Misfire Detected. ... aonther shop. New fuel and ignition parts everwere. Vortec 4.3 V6 in a C/K pickup application. Runs perfect unless you are cruising down a slight hill. Downhill only. You can feel it get rough and watch the Tech 2 missfire graph show misses on multiple cyl...
June 22, 2010
2006 Chevrolet Malibu Maxx SS 3.9L Misfire VIN: 1G1ZW63186
P0300: Multiple Engine Misfire Detected. this car has a miss on cyl 6 some misses on 2 and 4 . most of this is in mid warmup . is ok for the first 30 sec. then the the miss starts, goes to a dead miss on 6.after 30 min or so it will go to a slight miss.moved inj#6 to #4 no change on 6.moved inj wire ...
June 22, 2010
2002 Chrysler Sebring LXi 2.7L Cuts out, Misfire, MIL Lamp on VIN: 1C3EL55R82
P0300: Multiple Cylinder Misfire Detected. Hello everyone, This car has been one of the biggest headaches I have run into. The vehicle originally came in for a running hot and coolant leak. We found the water pump leaking from the external weep and the thermostat housing leaking. After a massive amount...
June 22, 2010
2003 Isuzu Rodeo S V6 3.2L Misfire, MIL Lamp on VIN: 4S2DM58WX3
P0300: Multiple Cylinder Misfire Detected. Customer said MIL and missing started on the highway after a while. Codes above are not very helpful. I'm looking for help with mode 6 data. I cannot find deffinition. Test ID $10 $0A Component $03 Spec 51,197 Failed at 51,242. I'm think a have a bad coil....
June 22, 2010
2003 Nissan Murano SE 3.5L Poor Idle Quality, Hesitation, Surge, Misfire, MIL Lamp on VIN: JN8AZ08W53
P0300: Multiple Misfire Detected. ... sluggish. No codes at first. Driven hard, will set a P0300. Both banks alpha readings would max out at 65%. Thought problem was a MAF and threw in a fuel system service for good measure. After blowing it out, only bank 2 now goes low. Bank 1 goes to 90 and...
June 23, 2010
1998 Pontiac Sunfire GT 2.4L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G2JD12T9W
P0300: Multiple Engine Misfire Detected. Vehicle came in with a bad misfire, P0300,swapped out the complete coil housing (coil housing, coils and ECM)- used- no change. Realized #1 injector was firing slower than the others, and at that time seen on the genisys that "output driver 2 open" was...
June 23, 2010
1998 Pontiac Sunfire GT 2.4L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G2JD12T9W
P0300: Multiple Engine Misfire Detected. Vehicle came in with a bad misfire, P0300,swapped out the complete coil housing (coil housing, coils and ECM)- used- no change. Realized #1 injector was firing slower than the others, and at that time seen on the genisys that "output driver 2 open" was...
June 24, 2010
2000 Chevrolet Blazer LS 4.3L Misfire VIN: 1GNCS13WOY
P0300: Multiple Cylinder Misfire Detected. Vehicle was towed into our shop. Customer was told by another shop that it had # 6 misfire and needed a head gasket. Found # 2 and # 6 plug wires switched. FIXED NOOOO. The vehicle now has # 4 misfire from idle to approximately 1774 RPM's. Between 1774 RPM's a...
June 28, 2010
2001 Chevrolet Venture LS 3.4L Poor Idle Quality, Hesitation, Cuts out, Stall VIN: 1GNDU23E11
P0300: Multiple Cylinder Misfire Detected. ... unable to fix it. Sent it to the dealer and they couldn't fix it. The dealer said to R&R the plugs and wires and put injector cleaner in it. so it is back to me. runs rough, and back fires into the intake when you give it wot here are some pids from my...
June 29, 2010
2005 Chevrolet Malibu LT 3.5L Poor Idle Quality, MIL Lamp on VIN: 1G12T52875
P0300: Multiple Engine Misfire Detected. P0300 , but we narrowed it down to #6 cylinder using misfire data from our modis , took front valve cover off to see if there was any mechanical problems , even smoke tested it with the valve cover off , car runs excellent exept for rough idle and slight misfi...
June 29, 2010
2001 Lexus RX300 3.0L Hesitation VIN: JTJHF10UX1
P0300: Random misfire. Hi All, I really would appreciate your input on this as it seems it may be a wild goose chase. The complaints are hesitation on highway. Codes are listed below. It seems to me that the rear A/F sensor bank 2 is out but I really have not enough knowledge to co...
June 29, 2010
2003 Pontiac Aztek 3.4L Stall VIN: 3UEIRJ38K3
P0300: Engine Misfire Detected. replaced headds due to cracks. and after start up noticed that it was missing on cyl. 5 checked plug and wire ok while looking at car the miss moved from 5 to cylds 1 and 6 constant misses it also has a hard start you have to really throttle it heavy to get it...
June 29, 2010
2007 Audi A4 Quattro Cabriolet 2.0L MIL Lamp on VIN: WAUDF48H67
P0300: pending...misfire codes. Hey Audi Techs...This car runs very well with good power, but the fuel trims at idle are +25...the max. We smoke tested the induction expecting to find a substantial vacuum leak...no such luck, the system is quite tight! Normal driving allows for normal fuel t...
June 30, 2010
2002 Ford Thunderbird 3.9L back fires starting VIN: 1FAHP6A024
P0300: plugs and coils all new last than 5000 miles. This car starts ok cold ,engine sometimes runs rough for a fell seconds ,then will run smooth . Runs well , on hard accellation smooth and has good power. shut off engine and let it sit ,then on restart takes two to three trys before it starts. It back fired a...
June 30, 2010