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P0300 Diagnostic Trouble Code Discussion for December 2010

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
1997 Chevrolet C1500 Silverado 5.7L Poor Idle Quality VIN: 2GTEK19R1V
P0300: Multiple Cylinder Misfire Detected. ... always recorded on cylinders 1,3,5,7. sometimes sets P0300 and sometimes sets bank 1 and bank 2 o2 sensor codes. Son replaced all o2 sensors twice. replaced plugs, cap and rotor, also replaced both catylitic converters for...
December 01, 2010
2006 Mazda 6 Mazdaspeed 2.3L MIL Lamp on VIN: JM1GG12L56
P0300: Random Misfire Detected. ... after previous repair with P0300. Scanned system to find misfire happened during first start up. Monitor system and cannot duplicate any misfiring during test drive, idle, hard or soft acceleration. ECM has been checked and updated to latest software. Tu...
December 01, 2010
2008 Mini Cooper S Clubman 1.6L Poor Idle Quality, Misfire VIN: WMWMF73508
Hell to all. We need some help with this mini cooper. Customer brought it in for replace spark plugs. Well it needs more than that I believe. It had these codes in it that I listed. We replaced the plugs and it still runs rough and surges at idle. Never worked...
December 01, 2010
2002 Volkswagen Cabrio GL 2.0L No Start VIN: 3VWDC21V82
P0300: random missfire. The customer complains of a no start in wet conditions,usually when the vehicle spends the night at our shop it starts right up as allways grrr. We have been battling this problem for awhile so I had read similar posts on IATN. The last time it wouldn't start ...
December 01, 2010
1998 Dodge B1500 3.9L Cuts out, Misfire, MIL Lamp on VIN: 2B4HB15X5W
P0300: Multiple Cylinder Misfire Detected. This vehicle is somewhat of a charity job for a single mother with young children. Every few days she says it will buck or even quit, then restart. It runs OK for a few days, then. Once, about two weeks ago, it quit in traffic and wouldn't restart...then was t...
December 03, 2010
2005 Nissan 350Z 3.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: JN1AZ34055
P0300: Multiple Misfire Detected. ... obvious misfire and a relatively easy fix (I thought). SES light was on/flashing with a DTC P0300 but no specific cylinder. I road tested the car and rechecked codes and found a P0306 so I swapped coils from #6 and #1, cl...
December 04, 2010
1997 Chevrolet C1500 Silverado 5.7L Poor Idle Quality VIN: 2GTEK19R1V
P0300: Multiple Cylinder Misfire Detected. ... always recorded on cylinders 1,3,5,7. sometimes sets P0300 and sometimes sets bank 1 and bank 2 o2 sensor codes. Son replaced all o2 sensors twice. replaced plugs, cap and rotor, also replaced both catylitic converters for...
December 05, 2010
2007 Volvo S80 V8 4.4L MIL Lamp on VIN: YV1AH85247
P0300: rdm miss. ... symptoms. p0300-p0308 codes in memory. tcm code [...] in memory. currently no vacuum leaks, no misfire counts current, running very smooth. fuel trims are +7% LT both banks, at idle, and reach +13 LT steady both banks on...
December 08, 2010
2006 Chevrolet Silverado 1500 LS 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 3GCEC14Z56
P0300: Multiple Cylinder Misfire Detected. ... repairs performed at another shop (plugs, ignition wires & both knock sensors. The mil was on and had code p0300 random misfire detected. The misfire is specifically at cylinder #1. The misfire is only at idle. Checked engine vacuum at idle (tested at ...
December 10, 2010
1998 Dodge B1500 3.9L Cuts out, Misfire, MIL Lamp on VIN: 2B4HB15X5W
P0300: Multiple Cylinder Misfire Detected. This vehicle is somewhat of a charity job for a single mother with young children. Every few days she says it will buck or even quit, then restart. It runs OK for a few days, then. Once, about two weeks ago, it quit in traffic and wouldn't restart...then was t...
December 11, 2010
1996 Jeep Grand Cherokee Laredo 4.0L MIL Lamp on VIN: 1J4GZ58S6T
P0300: Multiple Cylinder Misfire Detected. ... code po300 it has done this (6) times. no miss fire or driveability issue can be felt when the code is set. scanned all engine data all looks to be in spec. I have heard that the distributors on these engine are known for high failure. I have inspected the...
December 13, 2010
2003 Chevrolet Silverado 1500 5.3L Poor Idle Quality, Surge VIN: 1GCEK19T93
P0300: Multiple Cylinder Misfire Detected. ... stay alive about 450-600 RPM. Misfire counters are counting up on all cylinders while at idle. After a while it will throw a P0300 random misfire code. Above idle, the engine runs great with no cutouts or misses. I have performed a mass spectrum of testin...
December 14, 2010
1996 Chevrolet Blazer 4.3L Misfire VIN: 1GNCT18W0T
P0300: Multiple Cylinder Misfire Detected. hi guys i have this s-10 blazer in the shop misfiring pulled coded came up with po 300 checked fuel pressure pressure was good also checked for leak down it held pressure overnight i next looked at the cap and rotor and wires they were in good shape then i pul...
December 16, 2010
2000 Jeep Grand Cherokee Laredo 4.0L Misfire, MIL Lamp on VIN: 1J4GW48S5Y
P0300: Multiple Cylinder Misfire Detected. OK , Im stumped . i was a jeep tech for 10 yrs and had seen many 4.0l cyl heads cause this issue . the cust states ck. engine light is on with no driveability symptoms . ck and found codes for misfire on all cyls . cleared codes and road tested . on a long sli...
December 18, 2010
2001 Ford F-150 Lariat 5.4L Surge, Misfire VIN: 1FTRW08L61
P0300: Multiple cylinder Missfire. ... obvious or common problems have been addressed.I replaced all 8 plugs autolite double platinum,all 8 insulators (boots),induction service,1 coil after the fact.Set of intake gaskets also after the fact.Noticed only once when cold a surge that was evident a...
December 20, 2010
2006 Ford F-150 FX4 5.4L Hesitation, Misfire, Poor Fuel Economy VIN: 1FTPWO45X6
P0300: multiple misfire. Well, i am stumped on this one. This vehicle has a stumble on medium to hard acceleration when vehicle is warmed up. Another shop installed a torque converter thinking it was a lockup issue. Not sure what their reasoning was, but it did not fix the problem. I ...
December 20, 2010
2001 Kia Sportage 2.0L Misfire VIN: KNDJB72301
P0300: Random Cylinder Misfire Detected. car came in with engine running bad,we checked compression and all cyl's were 100 - 110 lbs. found that #1 and #2 cyl's were firing with weak spark,checked coil and found that it was borderline on resistance so we replaced both coils. cyl's 1 and 2 still firin...
December 20, 2010
2001 Chevrolet S10 4.3L Hesitation, Cuts out, Stall, MIL Lamp on VIN: 1GHK45SD34
P0300: Multiple Engine Misfire Detected. ... that is kicking my butt once again. The main complaint is that it will cut out and fall on it's face while driving mainly at highway speeds. It's a very intermittant problem. Happened to me once while I had a fuel pressure gauge attatched to windshield and...
December 21, 2010
2001 Ford F-150 Lariat 5.4L Surge, Misfire VIN: 1FTRW08L61
P0300: Multiple cylinder Missfire. ... obvious or common problems have been addressed.I replaced all 8 plugs autolite double platinum,all 8 insulators (boots),induction service,1 coil after the fact.Set of intake gaskets also after the fact.Noticed only once when cold a surge that was evident a...
December 21, 2010
2004 Ford F-150 FX4 5.4L Surge, Stall, Misfire VIN: 1FTPW14564
P0300: random miss. ... with a P0305 only. no problem was noticed while driving under average conditions. I "hydroscoped" the boots and found nothing. So i SWAG'ed it with #5 coil and all the boots. Cleared code, redrove and called customer. He said it only misses while ...
December 21, 2010
2003 Jaguar XK8 4.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: SAJDA42C23
P0300: random misfire. This vehicle was brought in with the complaint of check engine lamp on, and occasional rough idle for a few seconds after a 15-30 minute hot soak. On initial road test, we did not notice any problems, the engine ran great. During scan testing, we retrieved the...
December 21, 2010
2000 Jeep Grand Cherokee Laredo 4.0L Misfire, MIL Lamp on VIN: 1J4GW48S5Y
P0300: Multiple Cylinder Misfire Detected. OK , Im stumped . i was a jeep tech for 10 yrs and had seen many 4.0l cyl heads cause this issue . the cust states ck. engine light is on with no driveability symptoms . ck and found codes for misfire on all cyls . cleared codes and road tested . on a long sli...
December 21, 2010
2001 Mazda MPV LX 2.5L Misfire, MIL Lamp on VIN: JM3LW28G51
P0300: Multiple Misfire Detected. This vehicle was brought in with the recommendation to have the cataytic converters replaced. It ran like cr-p. we scanned the computer and found lean codes both banks, imrc stuck closed and random misfire and misfire #2 cyl. We replaced a broken pcv vac elbow...
December 21, 2010
1997 Mercedes-Benz C280 2.8L Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: WDBHA28E4V
P0300: Random missfire. I took on this vehicle to help a family member out. I replaced the headgasket for oil/coolant intermix. There was a slight idle surge before the the headgasket was replaced. Oil/coolant mix is no longer present. Block test also passes at this time. At idle the...
December 21, 2010
2006 Volkswagen Touareg 3.2L Misfire, MIL Lamp on VIN: WVGZ77L26D
idle is a slight bit shakey, no definitive miss on any specific cylinder. i see alot of posts with similiar problems on the touaregs but havent seen one definate underlying cause. i dont see too many touaregs come through the shop so i am not that familiar wit...
December 21, 2010
2005 Hyundai Tucson GLS 2.7L Hesitation, Cuts out, Stall, Misfire, MIL Lamp on VIN: KM8JM12D25
P0300: Multiple Misfire Detected. runs fine in park at all rpm. removed front pipe to check for bad converters and they look ok. unplug mass air flow and seems to run ok under load.replaced crank sensor wires where baked from heat off left converter.when driving under hard load cuts out and ge...
December 22, 2010
2001 Mazda MPV LX 2.5L Misfire, MIL Lamp on VIN: JM3LW28G51
P0300: Multiple Misfire Detected. This vehicle was brought in with the recommendation to have the cataytic converters replaced. It ran like cr-p. we scanned the computer and found lean codes both banks, imrc stuck closed and random misfire and misfire #2 cyl. We replaced a broken pcv vac elbow...
December 22, 2010
1996 Chevrolet C1500 5.7L Misfire, MIL Lamp on VIN: 2GCEC19R3T
P0300: Multiple Cylinder Misfire Detected. howdy all, 96 5.7r engine giving me some trouble,must be missing something obvious, its missfiring at idle, not as bad off idle, but still slightly there, customer had plugs, cap, rotor and wires replaced at another shop, everything with intall looks good, sca...
December 23, 2010
2002 Chevrolet Silverado 1500 5.3L Excessive Emissions, Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: 2GCEK19T72
P0300: Multiple Cylinder Misfire Detected. This vehicle has a terrible miss upon cold start below 45 degrees. It will miss,load up,stall and run terrible til it is warmed up. Looking at the misfire counter it shows all cylinders missing until it gets to operating temp. This truck has done this for the ...
December 23, 2010
2003 Jaguar XK8 4.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: SAJDA42C23
P0300: random misfire. This vehicle was brought in with the complaint of check engine lamp on, and occasional rough idle for a few seconds after a 15-30 minute hot soak. On initial road test, we did not notice any problems, the engine ran great. During scan testing, we retrieved the...
December 23, 2010
2005 Hyundai Tucson GLS 2.7L Hesitation, Cuts out, Stall, Misfire, MIL Lamp on VIN: KM8JM12D25
P0300: Multiple Misfire Detected. runs fine in park at all rpm. removed front pipe to check for bad converters and they look ok. unplug mass air flow and seems to run ok under load.replaced crank sensor wires where baked from heat off left converter.when driving under hard load cuts out and ge...
December 24, 2010
2001 Volvo V70 2.4L Poor Idle Quality, Misfire VIN: YU1SZ58DX1
P0300: random misfire. this one came in with check engine light on and misfiring on all cylinders. Vehicle is not even drivable, the misfiring is so bad. All the preliminaries, and are coming up with nothing obvious. Compression, vacuum, spark, all good. No vacuum leaks, does not ap...
December 24, 2010
2000 Chevrolet Malibu 3.1L No Start VIN: 1G1NE52J4Y
P0300: Multiple Cylinder Misfire Detected. Greetings to all this malibu was towed in last week for a crank no start checked real quick had spark and fuel pressure.the following day we tried to start car and sure enough car started checked for codes and only found po300 cylinder misfire.we checked the p...
December 28, 2010
2004 Ford F-150 FX4 5.4L Surge, Stall, Misfire VIN: 1FTPW14564
P0300: random miss. ... with a P0305 only. no problem was noticed while driving under average conditions. I "hydroscoped" the boots and found nothing. So i SWAG'ed it with #5 coil and all the boots. Cleared code, redrove and called customer. He said it only misses while ...
December 28, 2010
1999 Chevrolet Tahoe LT 5.7L Poor Idle Quality, Misfire VIN: 1GNEC13RXX
P0300: Multiple Cylinder Misfire Detected. ... rough, and having to keep their foot on the gas to keep vehicle running. codes where p0300, scanned misfire data and found #5 and #7 with multiple counts. Pulled plugs and both looked as though they were running very rich, switched them with 2 good cylinde...
December 29, 2010
1999 Chevrolet Tahoe LT 5.7L Poor Idle Quality, Misfire VIN: 1GNEC13RXX
P0300: Multiple Cylinder Misfire Detected. ... rough, and having to keep their foot on the gas to keep vehicle running. codes where p0300, scanned misfire data and found #5 and #7 with multiple counts. Pulled plugs and both looked as though they were running very rich, switched them with 2 good cylinde...
December 30, 2010
2003 Chrysler PT Cruiser 2.4L Poor Idle Quality, MIL Lamp on VIN: 3C4FY48B03
P0300: Multiple Cylinder Misfire Detected. Car came in with check engine light on and costomer said the car has no power.Road tested car seems to have plenty of power. But the car runs rough at idle.Also when watching the RPM on scan tool the Rpm will drop off but the engine will not change.And at idle...
December 30, 2010
2004 Jeep Liberty Sport 3.7L Misfire, MIL Lamp on VIN: 1J4GK48K44
P0300: Multiple Misfire Detected. ... Thanks in advance for the replies. I have this Jeep that is setting a P0300, the first time it came in it seemed a little rough at idle but the misfire counters were not picking up any measurable misfire. The freeze frame data showed the P0300 occurred at ...
December 31, 2010