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P0300 Diagnostic Trouble Code Discussion for May 2011

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
2004 GMC Safari 4.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GKEL19X34
P0300: Multiple Cylinder Misfire Detected. Hi all we are working on a 2004GMC Safari and we have tried everything and this sucker will not stop misfiring... Valve job, tune up, changed injectors, changed distributor, no matter what we do, same result, misfire. Any help would be greatly appreciated. Tha...
May 01, 2011
1997 Lexus LS400 4.0L Poor Idle Quality, MIL Lamp on VIN: JT8BH28F7V
P0300: Multiple Cylinder Misfire Detected. Hello,hope all is well.Ihave this night mare lexus that is smoking bad trims are negitive,p300 code i have missfires on every cylinder just on bank 2 everything else seems to be ok.When I have the key on engine off i could here one of the injectors on that ban...
May 01, 2011
2002 Volkswagen Passat GLS 1.8L Stall, Misfire, cold start
P0300: misfire multi. Hi there I have got an 02 passat that has a cold start misfire stall we have checked for vac leaks (smoke tested), check fuel pressure (50-52 psi), replaced coils with the lateset OE parts the MAF has been changed 2 times (jobber and then OE part) T/body has b...
May 01, 2011
1999 Chevrolet Tahoe 5.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GNEK13R2X
P0300: Multiple Cylinder Misfire Detected. ... misfire only at idle and at speeds under 40mph. I recommended full tune up to customer. They installed plugs and wires themselves. Verified proper wire routing and firing order. I replaced cap, rotor, and injector assembly (it was original and leaking). St...
May 02, 2011
2002 Chevrolet Silverado 1500 LS 5.3L Misfire VIN: 1GCEK14T92
P0300: Multiple Cylinder Misfire Detected. I have this 2002 chevy 1500 with a 5.3 T motor and only misses when driving at about 55 mph and accelerating to pass and dont feel it miss but scanner says it is missing in data (above 4500 rpm). In misfire data it misses on #2 cyl and the SES flashes. We swap...
May 04, 2011
2010 Chevrolet hhr 2.2L Misfire VIN: 3GNBAADB7A
P0300: missfire. Came in with check engine lt on. Scan tool showed 300 miss, 172 rich, and 1174 trim balance. Swapped coil and plug with another cylinder, but miss stayed in same place. Smoke test was performed on evap system but no leaks were detected. Also, blocked off evap ...
May 05, 2011
2001 GMC Safari SLE 4.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GTDM19W61
P0300: Multiple Cylinder Misfire Detected. Vehicle idles rough all the time, hot or cold. Runs perfect off idle with no misfires. Towes a trailer no problem with plenty of power. Cyl number 5 and 6 racking up misfires constantly at idle. Smoke tested intake with no external leaks found.
May 05, 2011
2002 Jaguar X-Type 3.0L Cuts out, Stall, Misfire, MIL Lamp on VIN: SAJEA51C22
P0300: misfire. vehicle has 6 new coils and spark plugs [towed in like that] i can clear codes while runnuing and in seems too run on 6 for a few seconds then goes back too cylinders 2-4-6 only,checked for power on red wire at all coils and there is battery power,checked grou...
May 06, 2011
1999 Saab 9-5 2.3L MIL Lamp on VIN: TS3ED48E1X
P0300: random misfire. ... obd2 scanner for this car so I dont have a lot of scan data. Had a code for random misfire and slow o2 sensor response. checked spark plugs and are in good shape, test drove and is not missing so replaced the o2 sensor and test drove and the check engine l...
May 06, 2011
2001 Dodge Ram 1500 Truck 5.2L No Power VIN: 3B7HF13Y01
P0300: Multiple Cylinder Misfire Detected. Please be patient, first post. Truck came in with no power driving. In park it runs decent. I loaded it up pretty good and got the 3 misfire codes above to happen but no codes occur while driving when truck is acting up. when you try to accelerate the truck bo...
May 10, 2011
2001 GMC Safari SLE 4.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GTDM19W61
P0300: Multiple Cylinder Misfire Detected. Vehicle idles rough all the time, hot or cold. Runs perfect off idle with no misfires. Towes a trailer no problem with plenty of power. Cyl number 5 and 6 racking up misfires constantly at idle. Smoke tested intake with no external leaks found.
May 10, 2011
2002 Chevrolet S10 4.3L Misfire VIN: 1GCCS19W82
P0300: Multiple Engine Misfire Detected. ... with this truck. 02 s10 w/4.3. It has a misfire code(p0300). #3 and #6 misfire @ 1800rpm and i have no clue why. I replaced the crank sensor and added shims but no luck! Whats crazy is that when i remove the brake booster vac line and rev it up to 1800rpm ...
May 13, 2011
2003 Buick Century 3.1L Misfire VIN: 2G4WS52J93
P0300: Engine Misfire Detected. I have a regular customer with a car i have never seen. Came in for engine runs rough and check engine light. Monitored misfire data and notice cylinder #1 misfiring. I swapped a wire and a plug and nothing changed. But when i took the plug out i noticed that...
May 16, 2011
2006 Dodge Durango SLT 4.7L Poor Idle Quality, MIL Lamp on VIN: 1D4HB48N26
P0300: Multiple Misfire Detected. All 4 O2 sensors replaced at dealership. Mode 6 misfire history skipping on 1 3 5 7. skip is intermitten, mostly when engine is hot, when 1st started. one time when started hot would not accelerate with 3/4 throttle vehicle would only lean backfire. fuel pump ...
May 16, 2011
2005 Kia Sedona LX 3.5L MIL Lamp on VIN: KNDUP13265
P0300: Multiple Misfire Detected. ... of power. MIL was on, had Upstream O2 sensor code. Road test, un able to duplicate, replaced o2. Car came back 1 month ago. Same complaint. Lack of power. MIL on agian, This time TPS code. Replaced TPS. Road tested. No problems felt. Car is back again. S...
May 17, 2011
2000 BMW 323i 2.5L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: WBAAM3330Y
P0300: Random misfire. Well this car came to the shop with misfire codes on the memory, after check found out that the plugs were in really bad shape and the valve cover gasket leaking oil, we replace it, but problem continue. The problem happens most of the time when car is cold an...
May 18, 2011
2004 Ford Thunderbird 3.9L Misfire VIN: 1FAHP60A84
P0300: Random misfire. Vehicle came in with p0301 code. We did tune and replaced one coil along with fuel filter. There was no water around coils or plugs nor any oil contamination. The vehicle has low mileage and was running fine according to customer. Now it runs poorly under acce...
May 18, 2011
2001 Volkswagen Passat GLS 1.8L Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: WVWPD63B01
P0300: random misfire. i need some help from vw techs please and thanks i have this passat is running rough and showing misfire all 4 cylinder it only happens when its cold and first start up it run rough about 1 minute or maybe little more and goes away after that car runs fine no ...
May 18, 2011
2001 Volkswagen Jetta GLS 1.8L Poor Idle Quality, Hesitation, Surge, Stall, Misfire, MIL Lamp on VIN: 3VWPD69M51
P0300: Multiple and random misfire. This car came to us from another shop due to sporadic lack of throttle responce, got fault codes for angle sensors and lack of adaptation. This problem has been on going for aboute 6-9 months and has progressivlly gotten worse. We have checked and cleaned all ...
May 18, 2011
2003 Chevrolet Blazer LS 4.3L No Start, Misfire, MIL Lamp on VIN: 1GNCS18X13
P0300: Multiple Cylinder Misfire Detected. ... running rough, died, then restarted and has been running rough since. Self test EEC had codes P0128 and P0300. There weas a TSB in AllData related to the distributor, so I removed and inspected it with no obvious concerns. upon inspection noticed only had ...
May 19, 2011
2006 Dodge Durango SLT 4.7L Poor Idle Quality, MIL Lamp on VIN: 1D4HB48N26
P0300: Multiple Misfire Detected. All 4 O2 sensors replaced at dealership. Mode 6 misfire history skipping on 1 3 5 7. skip is intermitten, mostly when engine is hot, when 1st started. one time when started hot would not accelerate with 3/4 throttle vehicle would only lean backfire. fuel pump ...
May 19, 2011
2000 Mazda Miata LS 1.8L Excessive Emissions, Poor Idle Quality, low on power VIN: JMINB3530Y
P0300: Random Misfire Detected. ... intermittent (rare) poor idle quality and low on power. Customer said it had occurred after a battery replacement. We found fault [...] po420 Replaced plugs, plug wires, catalytic converter,rear oxygen sensor (after cat), EGR valve and ignition coil. Test ...
May 20, 2011
2001 Pontiac Grand Am SE 2.4L Misfire, MIL Lamp on VIN: 1G2NF52TX1
P0300: Multiple Cylinder Misfire Detected. will the ecm cause this type of problem
May 20, 2011
2001 Chevrolet Express 3500 5.7L Hesitation, Cuts out, Misfire, MIL Lamp on VIN: 1GCHG35R91
P0300: Multiple Cylinder Misfire Detected. I have a slight misfire on #5, #7 and sometimes #6 and #2 cylinders. Primarely it is #5 and #7 though. At idle it runs smooth with only showing a misfire on those 2 cylinders sometimes(count is below 5). When I give it gas for a few seconds(vehicle in park / n...
May 23, 2011
2004 GMC Savana 3500 6.0L MIL Lamp on VIN: 1GTHG35U64
P0300: Multiple Cylinder Misfire Detected. I just replaced the engine on this van due to low oil pressure on the old engine. I was very meticulous about the installation. The engine runs fine but the customer told me the check engine light has been coming on and off, somtimes flashing. I asked if he ha...
May 23, 2011
2000 BMW 323i 2.5L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: WBAAM3330Y
P0300: Random misfire. Well this car came to the shop with misfire codes on the memory, after check found out that the plugs were in really bad shape and the valve cover gasket leaking oil, we replace it, but problem continue. The problem happens most of the time when car is cold an...
May 24, 2011
2001 Chevrolet Express 3500 5.7L Hesitation, Cuts out, Misfire, MIL Lamp on VIN: 1GCHG35R91
P0300: Multiple Cylinder Misfire Detected. I have a slight misfire on #5, #7 and sometimes #6 and #2 cylinders. Primarely it is #5 and #7 though. At idle it runs smooth with only showing a misfire on those 2 cylinders sometimes(count is below 5). When I give it gas for a few seconds(vehicle in park / n...
May 24, 2011
2008 Chevrolet Silverado 1500 WT 4.3L Misfire, MIL Lamp on VIN: 1GCEK14X28
P0300: engine misfire. Vehicle came in with misfire and popping thru intake(as in lean) on acceleration with misfire counts predominate on #1 cylinder. Spark plugs black. Changed plugs and left here running perfect after finding no other problems. Back 2 days later with same problem...
May 24, 2011
2001 GMC Yukon XL 1500 SLE 5.3L lean surge VIN: 3GKEC16T21
P0300: Multiple Cylinder Misfire Detected. Truck surges and runs lean on bank 1 under load(hard acceleration). Fuel trim @ + 20%. Runs fine under normal driving (fuel trims OK). Idles decent @ 20" vac. Runs good until it warms up (closed loop). Smoke machine or propane will not locate vac. leak. ch...
May 24, 2011
2008 Hummer H3 3.7L Misfire VIN: 5TGTEN13EX
P0300: random cyl misfire. I've got the vehicle coming in 2days from now to run low pressure cylinder leakdown test and clean fuel injectors again. any other ideas?
May 24, 2011
2000 Toyota Camry LE 3.0L Misfire, MIL Lamp on VIN: 4T1BF22K3Y
P0300: Multiple Cylinder Misfire Detected. ... something. car came in with check engine light on, pulled codes and had p0306 and p0300. engine felt like it was running rough, so i cleared the codes and swapped the plug. did not follow. so i swapped the coil and it also d...
May 24, 2011
1998 Chevrolet C1500 Silverado 5.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GCEC19M4W
P0300: Multiple Cylinder Misfire Detected. Here's a head scratcher. I just installed a used engine in this truck due to the old engine mixing water in with the oil. The truck ran fine - the only issue was water in the oil. This used engine has approx 180,000kms. The problem is this engine won't run rig...
May 25, 2011
2001 Honda Odyssey LX 3.5L Misfire VIN: 2HKRL18671
P0300: Multiple Misfire Detected. Depsite visual, fuel and vacuum checks the engine continues to run with a misfire. It is important to note that prior to the oil pressure switch change the problem did not exist. After the repair, the misfire developed.
May 25, 2011
2000 Chevrolet S10 4.3L Excessive Emissions, Hesitation, Stall, Misfire, MIL Lamp on VIN: 1GCCS19W6Y
P0300: Multiple Engine Misfire Detected. hi there.i have a 2000 s10 in with a bad miss fire seems like cylindes #3 and #6.replaced wires cap roter and dist.computer fireing injectors and they all ohm the same.scan tool data shows o2"s are ok.tryed a module no different.could this be pluged inject...
May 26, 2011
2005 Ford E-350 Super Duty 5.4L Misfire, MIL Lamp on VIN: 1FTSS34L95
P0300: Random Misfire Detected. ... codes po300 - p0306,Upon checking history with fleet co. vehicle had never been tuned up and we confirmed O.E. plugs with 204K!! Replaced plugs and cylinder six coil. Vehicle returned to shop week later with only PO306 Code, driver stating vehicle misses o...
May 26, 2011
2003 Mazda Tribute LX 3.0L Misfire, MIL Lamp on VIN: 4F2CZ941X3
P0300: Multiple Misfire Detected. This vehicle sat for two weeks the customer drove car developed missfire. The missfire comes and goes. I used our lab scope to look at coils in the front of motor. The pattern looked the same on the three coils. Then we cleaned injectors and upper intake clear...
May 27, 2011