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P0300 Diagnostic Trouble Code Discussion for October 2012

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
2005 Chevrolet Impala 3.4L Surge, Misfire, MIL Lamp on VIN: 2G1WF52E85
P0300: Multiple Cylinder Misfire Detected. Came in with a P0300 misfire code and no driveability complaint. On road test under light load only we are getting misfire counters on all cylinders but mostly on #4 and #1. Can feel it when power braking lightly also.Plugs and spark output good, swapped coi...
October 01, 2012
1996 Chevrolet Tahoe LS 5.7L Misfire, MIL Lamp on VIN: 1GNEK13RXT
P0300: Multiple Cylinder Misfire Detected. this for gm puzzle.truck came in coolant leak from lower intake gasket. replaced lower, upper all other gaskets. mark distributor before pull. re-installed same at the mark put back together. missfire engine service soon light on and flash, check code po300 ru...
October 03, 2012
1997 Chevrolet K2500 Suburban LT 7.4L Poor Idle Quality, Cuts out, Misfire, MIL Lamp on VIN: 1GNGK26J1V
P0300: Multiple Cylinder Misfire Detected. ... can offer. I have this 97 big block chevy suburban 454 that at first came with misfire code p0300 . Replaced wires , plugs and 3 different caps and 1 injector. my scanner showed misfire first on #4 mainly and some on #7 and 1. Compression good 115 on all c...
October 03, 2012
2005 Ford F-250 Super Duty Lariat 5.4L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 1FTSX20585
P0300: Random Misfire Detected. ... for but this one has done it! i want to explain everything so please read the entire post. Started out coming to the shop. I was told check engine light is on. pull in shop and check codes. p0171. i check fuel trim at 1800 and at idle and trims total no ...
October 04, 2012
2003 Pontiac Grand Am SE 3.4L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire VIN: 1G2NF52E63
P0300: Multiple Cylinder Misfire Detected. ... engine light, running rough, and stalling. It had a P0300 stored. Data showed missfire counts current to be in the low hundereds on cyl. #3. History misfire on #3 were in the thousands. First thing I did was verify the customer routed the wires right and c...
October 04, 2012
1996 Chevrolet Blazer 4.3L Poor Idle Quality, Hesitation, Cuts out, MIL Lamp on VIN: 1GNCS13W1T
P0300: Multiple Cylinder Misfire Detected. Good Morning , This S-10 blazer will run good once warm, all day long. Let it sit for a day or more,it start's rough, idle's rough ,drive it, loss of power,give it alot of throttle and it clears up. It will stutter on accel. until warm then run's good. The cu...
October 06, 2012
2001 Chevrolet Venture LS 3.4L Misfire VIN: 1GNDX13E31
P0300: Multiple Cylinder Misfire Detected. Car runs rough on a cold start for about 15 seconds and then it will run smooth. Car runs fine on a flat surface but as soon as you start going up a slope (25 deg.), it sill start loosing power, if I will step harder on the accelerator pedal, the Check engine ...
October 08, 2012
1997 Chevrolet K1500 Cheyenne 5.7L Misfire VIN: 2GCEK19R5V
P0300: Multiple Cylinder Misfire Detected. Vehicle came back yesterday with multiple cyl. misfire code and had a feeling the (reman)injector unit went bad and used a bore scope to confirm the fuel pressure regulator was leaking bad.Replaced with a Delco unit and all was well except a cyl. 3 misfire on ...
October 09, 2012
2006 Volkswagen Jetta 2.5 2.5L Misfire VIN: 3VWSF31K36
This vehicle came in running rough at idle, misfing at cruise. Replaced valve cover cause 15" vacuum at dipstick tube, traced to breather failure, but still misfire at cruise. Suspect timing chain issue, Checked Block 093,channel four, should be 0 degrees ...
October 09, 2012
1997 Chevrolet K1500 Cheyenne 5.7L Misfire VIN: 2GCEK19R5V
P0300: Multiple Cylinder Misfire Detected. Vehicle came back yesterday with multiple cyl. misfire code and had a feeling the (reman)injector unit went bad and used a bore scope to confirm the fuel pressure regulator was leaking bad.Replaced with a Delco unit and all was well except a cyl. 3 misfire on ...
October 10, 2012
2006 Mazda 6 Mazdaspeed 2.3L Misfire VIN: JM1GG12L36
P0300: Random Misfire Detected. ... has an intermittent missfire that only occurs at 3200-4000 rpm in 3rd gear. it initally arrived with no codes and on the first t.d. in late afternoon it had an intermittent mifire that lasted less than 2 seconds. When I drove early the next morning after a...
October 11, 2012
2000 Chevrolet Malibu 3.1L Poor Idle Quality, Misfire VIN: 1G1ND52J8Y
P0300: Multiple Cylinder Misfire Detected. Hi all, We have a malibu that has a miss at idle. We went back through the misfire data to identify cylinder#5 as the problem. It does not count high enough to set a p0305. We noticed an arching wire so we replaced the plugs and wires(original). After complet...
October 12, 2012
2004 Volkswagen Passat GLX 4 Motion 2.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: WVWTH63B24
P0300: Random misfire. Vehicle came in with cam position sensor faults and misfire faults on bank 1. We checked to see if there was any movement from the cam adjustment unit. Found the reading to be opposite of bank 2 on decrease from higher rpms and not changing with rpm increase. ...
October 12, 2012
2000 Pontiac Grand Prix GTP 3.8L MIL Lamp on VIN: 1G2WR1213Y
P0300: Engine Misfire Detected. car flashes serv eng soon lite, miss fire counter always shows miss 1,4 cyl,do not feel missfire. counter shows missfire 1,4 at idle,still dont feel missfire
October 13, 2012
2003 Jeep Liberty Sport 3.7L MIL Lamp on, indicated misfire VIN: 1J4GL48K73
P0300: Multiple Misfire Detected. Hi guys, I have an difficult one that I may not be approaching in the right way. This Jeep setup has had many problems with misfires due to valvetrain problem. But that being said, the vehicle/engine I am working on seems to runs OK but shows misfires on the m...
October 16, 2012
2002 Nissan Maxima SE 3.5L Misfire, MIL Lamp on VIN: JN1DA31A02
P0300: Multiple Misfire Detected. ... diagnosed and repaired a couple months ago and has now returned after a visit to the Nissan dealer. A few months ago the dealer performed a tune-up and recommended a MAF sensor due to the active P0300 code. I installed the MAF, cleared the code and checked...
October 16, 2012
2002 Buick Century Custom 3.1L Stall VIN: 2G4WS52J32
P0300: Engine Misfire Detected. ... miss.Scanned it at the time I had 2 codes PO300 And P1189... Checked the misfire count and #1 Cyl was highest.Changed the plugs, wires and fuel filter and ran much better.Let the car set for awhile and came back and started it and it ran for a bit and stop...
October 17, 2012
2005 Audi A6 Quattro 3.2L Poor Idle Quality, Surge, Cuts out, Misfire, Poor Fuel Economy VIN: WAUDG74F25
P0300: Cylander 3 missfire. Miss fires cold and only after it runs for just a short time like 90 seconds it is fine for the rest of the day until it sits over night again, then it will cough and puke until it gets just a little bit of temperature in the motor. We have checked fuel pressu...
October 18, 2012
2002 Buick Century Custom 3.1L Stall VIN: 2G4WS52J32
P0300: Engine Misfire Detected. ... miss.Scanned it at the time I had 2 codes PO300 And P1189... Checked the misfire count and #1 Cyl was highest.Changed the plugs, wires and fuel filter and ran much better.Let the car set for awhile and came back and started it and it ran for a bit and stop...
October 18, 2012
2007 Mazda CX-7 Touring 2.3L Misfire VIN: JM3ER29307
P0300: Random Misfire Detected. ... back with p0300, and p0301 replaced coil and it never counted any more misses left again but now really started missing brought back replaced coil again with oem one never counts any miss fires let set over night found col...
October 19, 2012
1996 Chevrolet Monte Carlo Z34 3.4L Misfire, MIL Lamp on VIN: 2G1WX12X0T
P0300: Multiple Engine Misfire Detected. This is a dual overhead cam 3.4 engine. Customer complaint was high unstable idle at times and misfiring at idle. High unstable idle was caused by a bad mass air flow sensor. Replaced sensor, unstable idle fixed. Misfire is the real problem. Misfire is only on...
October 23, 2012
2001 Chevrolet Venture LS 3.4L Misfire VIN: 1GNDX13E31
P0300: Multiple Cylinder Misfire Detected. Car runs rough on a cold start for about 15 seconds and then it will run smooth. Car runs fine on a flat surface but as soon as you start going up a slope (25 deg.), it sill start loosing power, if I will step harder on the accelerator pedal, the Check engine ...
October 23, 2012
2007 Pontiac G6 2.4L Misfire, MIL Lamp on VIN: 1G2ZG58B17
P0300: Random Misfire Detected. ... this 2007 G6 with a trouble code P0171 and P0300 that keeps poping up. I have replaced the cataytic converter do to a trouble code P0420. I know the cat was bad as soon as I saw the O2 sensors on the scanner. Now I have to fix what killed the originl cat. ...
October 23, 2012
1996 Chevrolet Blazer 4.3L Poor Idle Quality, Hesitation, Cuts out, MIL Lamp on VIN: 1GNCS13W1T
P0300: Multiple Cylinder Misfire Detected. Good Morning , This S-10 blazer will run good once warm, all day long. Let it sit for a day or more,it start's rough, idle's rough ,drive it, loss of power,give it alot of throttle and it clears up. It will stutter on accel. until warm then run's good. The cu...
October 24, 2012
2006 Ford F-150 XLT 5.4L MIL Lamp on VIN: 1FTVX12526
Please take a look at scope patterns in wave forms paul [...] f150 trying to tell if cam phasers are retarded or advanced or if chain has jumped
October 24, 2012
1998 GMC Sonoma SL 4.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GTCS14X4W
P0300: Multiple Engine Misfire Detected. ... Sonoma 4.3x that I purchased for my son as a first vehicle. When i bought it the owner had been chasing a running problem and replaced many parts trying to replace it on his own and then the engine finally spun a rod bearing and started knocking and he sol...
October 24, 2012
1999 Dodge Ram 1500 Truck 5.9L Misfire
P0300: Multiple Cylinder Misfire Detected. Hi all! Got another one that is currently stumping us and a search on here and google has turned up nothing applicable. This truck is incredibly well taken care of and in great shape. It came in after having all the injectors, plugs, and wires replaced. It mis...
October 26, 2012
2003 Audi A4 Quattro 3.0L Misfire, MIL Lamp on VIN: WAULT68E63
P0300: Random misfires. Vehicle came in with complaint of MIL flashing and misfires felt. Did a little research and found numerous problems with the coils, they appeared original and so I replaced them with IDI coils. Plugs were NGK and looked good. Repaired some dubious looking vacu...
October 29, 2012
2007 Jeep Liberty Sport 3.7L Misfire VIN: 1J4GL48K07
P0300: Multiple Cylinder Misfire. this jeep is misfiring on cylinders 2 4 6 all on the right bank. the only time I have seen the check engine light start flashing is coming down a hill on decel I have never felt a misfire under load.I have replaced the spark plugs they were worn out. I have ch...
October 31, 2012