P0300 Diagnostic Trouble Code Discussion for August 2009
Multiple Misfire Detected
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| Help Request | Posted | |
| 1996 Chevrolet K1500 5.7L Misfire VIN: 1GTEK19R4T P0300: Multiple Cylinder Misfire Detected. calling all gm experts. this one has the whole shop stumped. this vehicle has a constant misfire on cylinder #3 datastream indicates that this misfire is on #4. pcm will not fire injector. depinned pcm, and hooked up a noid light directly to pcm, will not sen... |
August 04, 2009 | |
| 2004 Chevrolet Express 3500 6.0L Poor Idle Quality, MIL Lamp on VIN: 1GBHG31V64 P0300: Multiple Cylinder Misfire Detected. when this truck was brought to us 3 months ago mil light on with a p0157 low b2s2 activity and oe plugs at 85000, we thought it to be a no brainer ,full tune up and 4 new 02 sensors.flash ahead 2 months and we r chasing multiple o2 and lean exhaust codes.repla... |
August 04, 2009 | |
| 1996 Chevrolet K1500 5.7L Misfire VIN: 1GTEK19R4T P0300: Multiple Cylinder Misfire Detected. calling all gm experts. this one has the whole shop stumped. this vehicle has a constant misfire on cylinder #3 datastream indicates that this misfire is on #4. pcm will not fire injector. depinned pcm, and hooked up a noid light directly to pcm, will not sen... |
August 05, 2009 | |
| 2002 Chevrolet Camaro Z28 5.7L Misfire VIN: 2G1FP32G02 P0300: Multiple Engine Misfire Detected. Ok GM guys this is a good one! This car has 1900 miles on it. The customer replaced the fuel injectors thinking they were "gummed" There is a dead missfire on #4/#6 at idle till 2200 rpm. All rpms ABOVE 2200 the missfire on 4 and 6 is gone and #5 sta... |
August 05, 2009 | |
| 2003 Chevrolet Express 3500 6.0L Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GCHG35U23 P0300: Multiple Cylinder Misfire Detected. ( NATURAL GAS VEHICLE ) Had a customer tow this vehicle from another shop. The other shop had a multiple misfire problem and had done a tuneup. They had replaced the spark plugs, wires, injectors, coils and fuel rail and they were unsuccessful and ran out of i... |
August 05, 2009 | |
| 2005 Jeep Grand Cherokee Laredo 4.7L Poor Idle Quality, MIL Lamp on VIN: 1JHR48N35C P0300: Multiple Cylinder Misfire Detected. Jeep came in with customer requesting O2 sensor replacement,scanned and replaced bank 1 sensor 1 O2,OE Part, Jeep Runs rough,I have Checked Fuel pressure(60 psi) Vacuum 17 inch,checked exhaust back pressure Less than 1 lb, Smoked intake no leaks, Fuel trim # b... |
August 05, 2009 | |
| 1999 Dodge Ram 1500 Laramie 5.2L Misfire, Poor Fuel Economy, 14 miles per gal. hi VIN: 1B7HC16Y4X P0300: miss fire. this pickup runs good most of the time but has never had good fuel econ. 14 to 16 miles per gall. at 90,000 replaced spark plugs and wires also preformed fuel induction clean and injecter clean by BG. After still intermitt miss pull injectors out and hand clea... |
August 07, 2009 | |
| 2005 Kia Sedona EX 3.5L Hesitation, Cuts out, Stall, Misfire, MIL Lamp on VIN: KNDUP13215 P0300: Multiple Misfire Detected. van came in for a tune-up changed plugs and wires customer complained afterward of vehicle hesitation mil lamp was on checked codes came up random misfire cleaned maf and throddle seem to run fine next day customer said vehicle doing it again noticed rpm gage ... |
August 07, 2009 | |
| 1999 Chevrolet Blazer 4.3L Misfire VIN: 1GNDT13W6X P0300: Multiple Cylinder Misfire Detected. ... with a no start condition. found injector unit leaking. replaced with mfi unit. vehicle ran well, cust took and brought it back 3 weeks later running rough. it had a p0300. misfire monitor showed cyl.#1&6 counting up misfires. plugs, wires, cap& ro... |
August 08, 2009 | |
| 2001 Honda Accord EX 3.0L Misfire VIN: 1HGCG16521 P0300: Multiple Misfire Detected. ... system showed codes: P0302, P0304, P0305, P0300, P1399. Swapped coil packs around and to my surprise the following codes are now shown: P0301, P0302, P0304, P0305, P0300, P1399. Same as first... |
August 10, 2009 | |
| 1998 Mercedes-Benz ML320 3.2L Misfire, MIL Lamp on, shuts off #2 % #6 VIN: WDBKK47F2W P0300: random misfire. over 2400RPM accumulates enough misfire faults to turn off cyls 2&6 will idle fine, unable to drive car long enough to perform sensor adaptation. came to us from another shop, they put coils, wires, plugs and a CKP on it to no avail. Vacuum is aprox 15-17 ... |
August 10, 2009 | |
| 2005 Saturn Ion-1 2.2L Surge VIN: 1G8AF52F85 P0300: Random Misfire Detected. Hi guys, This customer came to my shop for severe surge when cold has he release the clutch. When he brought me the car and after a cool down I positively agreed with him and the complaint. First I hooked the scantool and 2 codes as mentionned were listed as ... |
August 10, 2009 | |
| 2003 Dodge Ram 3500 5.7L Cuts out, Misfire, MIL Lamp on VIN: 3D7MU48DX3 P0300: multi cyl miss. ... 5.7 hemi The truck when hot and under med to heavy load will missfire violently. It throws a p0300 multi miss immediately and missfires on 6 out of 8 cylinders. the cylinders that are missing are 1,2,3,5,7,8. 4 and 6 show zero misses. It also throws a p031... |
August 12, 2009 | |
| 2000 GMC Sonoma SL 4.3L No Start VIN: 1GTCS19WXY P0300: Multiple Engine Misfire Detected. customer complaint - vehicle is very hard to start in am but ok after it does start. for several days it started ok for me. after sitting over weekend it failed to start. spark is good. fuel pressure ok. and getting pulse at injectors. vehicle would not fire e... |
August 12, 2009 | |
| 2003 Nissan Altima 2.5L Poor Idle Quality, Cuts out, Misfire, MIL Lamp on, ENGINE NOISE VIN: 1N4AL11DO3 P0300: Multiple Misfire Detected. hello techs this vehicle came in with a rough idle and a cel on.initial inspection proved failed crank sensor,sensor was replaced.now cel is back on with a random cylinder misfire and when it gets to a certain temperature engine sounds like it is coming apart... |
August 12, 2009 | |
| 1999 Chevrolet Blazer 4.3L Misfire VIN: 1GNDT13W6X P0300: Multiple Cylinder Misfire Detected. ... with a no start condition. found injector unit leaking. replaced with mfi unit. vehicle ran well, cust took and brought it back 3 weeks later running rough. it had a p0300. misfire monitor showed cyl.#1&6 counting up misfires. plugs, wires, cap& ro... |
August 13, 2009 | |
| 2002 GMC Sierra 2500 HD SLE 6.0L Misfire VIN: 1GTHK29U62 P0300: Multiple Cylinder Misfire Detected. Hi There any help in advance is greatly appreciated. This truck came in with flashing Engine light at speeds above 60mph but no drivability concern. Truck runs excellent. Searched archives and found possible needs crank relearn. Tried with otc and snap on and... |
August 13, 2009 | |
| 2000 Volkswagen Jetta GLX 2.8L Misfire, MIL Lamp on VIN: 3VWTE29M9Y P0300: Random/Multiple Cylinder Misfire. Hi, I seem to have checked everything I can check and am looking for some direction on this car. It has a misfire on cyl5 under load, worse when hot. Feels like an ignition miss. First tried swapping plugs and wires with a diff. cylinder to see if there was an... |
August 14, 2009 | |
| 2006 Chevrolet HHR LT 2.4L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 3GNDA23P76 P0300: Random Misfire Detected. random misfire is back all coils appear to be ok the misfires are on cylinder # 1 if i snap throttle some show up on # 2 not many though used oe plugs, very perplexing what i though was a simple fix has turned into something else, any help will be appreciated.... |
August 15, 2009 | |
| 2005 Chrysler 300 Limited 3.5L MIL Lamp on VIN: 2C3JA53G75 P0300: Multiple Cylinder Misfire. ... code, O2 2/1 high voltage, was hanging above 4 volts for several minutes. Testing lead to replacing the O2 sensor. Car test drove OK, but was back two days later with a P0152 and a P0300. Went through testing again, could not find fault for P0152 code, rep... |
August 16, 2009 | |
| 1997 Audi A4 Quattro 2.8L Poor Idle Quality, Cuts out, Misfire, MIL Lamp on VIN: WAUEA88D3V P0300: random misfire detected. I have a 97 Audi A4 Quattro that came in with MIL light on and misfire codes for cyl's 4,5 & 6. Pulled plugs to inspect, look pretty new. Wires look good. Checked for spark at affected cylinders, have good spark. Checked injector pulse on affected cylinder... |
August 17, 2009 | |
| 2005 Chrysler 300 Limited 3.5L MIL Lamp on VIN: 2C3JA53G75 P0300: Multiple Cylinder Misfire. ... code, O2 2/1 high voltage, was hanging above 4 volts for several minutes. Testing lead to replacing the O2 sensor. Car test drove OK, but was back two days later with a P0152 and a P0300. Went through testing again, could not find fault for P0152 code, rep... |
August 17, 2009 | |
| 1997 Mercedes-Benz E420 4.2L Misfire, MIL Lamp on VIN: WDBJF72F7V P0300: random missfire. well thank you in advance you guy's out there have not failed me yet this site is the best. well any way boss car he gave this job to new tech in shope tech did not follow the right procedure when he took car a part know hee dose not work for us so boss came t... |
August 17, 2009 | |
| 2000 Volkswagen Jetta GLX 2.8L Misfire, MIL Lamp on VIN: 3VWTE29M9Y P0300: Random/Multiple Cylinder Misfire. Hi, I seem to have checked everything I can check and am looking for some direction on this car. It has a misfire on cyl5 under load, worse when hot. Feels like an ignition miss. First tried swapping plugs and wires with a diff. cylinder to see if there was an... |
August 17, 2009 | |
| 2004 BMW X3 3.0i 3.0L Poor Idle Quality, MIL Lamp on VIN: WBXPA934X4 P0300: misfire multiple cylinders. This car has been back 3 times while we try and sort this mess out. The first two times it only had the O2 sensor codes. We replaced the sensors and recommended going to BMW for the software update. For some readson the changed the VTG oil and didnt do an upda... |
August 18, 2009 | |
| 2004 Lincoln Aviator 4.6L Misfire, MIL Lamp on VIN: 5LMEU68H04 P0300: random miss fire. ... genisys scan tool, although I can retrieve codes with state inspection machine. I haven't had any problems with this tool except with some lack of capabilities. It has the smart cable and updated to 2008. I checked fuses and the're ok. Truck runs rough and... |
August 18, 2009 | |
| 2001 Dodge Dakota 3.9L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1B7FL26X51 P0300: Multiple Cylinder Misfire Detected. Hello my friends,I have another problem child here that I need some input on where to turn or if my final diagnosis in correct.This customer is trying to pass the emmisions test because in Illinois they will not allow you to renew the plates if you dont pass t... |
August 19, 2009 | |
| 2003 Volkswagen Passat GLX 4 Motion 2.8L Misfire, MIL Lamp on VIN: WVWYH63B53 P0300: misfire detected. this customer came in with misfire concern and cel flashing, checked plugs and wires all found to be good. Prevouisly replaced plugs and ignition module for a misfire an cylinder #5, while on a trip they went to a dealed and they completed a motor flush for a ... |
August 22, 2009 | |
| 2005 Chevrolet Cobalt 2.2L Misfire, MIL Lamp on VIN: 1G1AK52F25 P0300: Multiple Engine Misfire Detected. hello guys. we have this cobalt with two dead holes, cylinders 2 and 3. engine has good compression on all holes. verified there is no spark on cylinders 2 and 3. misfire counters through the roof on the scanner for these two cylinders only. i verified power a... |
August 25, 2009 | |
| 1997 Pontiac Firebird 3.8L No Start, Stall, MIL Lamp on VIN: 2G2FS22KXV P0300: Multiple Engine Misfire Detected. ... short period and stop and run into a store then restart it will run rough and die and set a p0300 then it will clear up and run well. We cannot duplicate problem but were wondering if anyone had seen this before. fuel pressure good spark good. Tahnks for h... |
August 25, 2009 | |
| 1997 Chevrolet K1500 Suburban 5.7L Misfire VIN: 3GNEC16R6V P0300: Multiple Cylinder Misfire Detected. ... me fix his one i think i'll sell my tools and get a job at wallmart as a greater...should be alot less stress!!! vehl came in with miss on4,5,6,7,8, & p0300 replacedcap and rotor for possible crossfire on cap , misschanged to cyl 3/4 miss with 3 missin... |
August 26, 2009 | |
| 2000 Chevrolet Camaro 3.8L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 2G1FP22K1Y P0300: Multiple Engine Misfire Detected. Thanks for any help. The engine backfires through the intake manifold on snap throttle. Little rough on cold start but clears up when warm, about 160 degrees. Coils all fire but computer shows misfires on all cylinders, but #4, 3, and 5 are the worst. Injector... |
August 26, 2009 | |
| 2004 Chevrolet Malibu LS 3.5L Excessive Emissions, No Start, Poor Idle Quality, Hesitation, Stall, Misfire, MIL Lamp on VIN: 1GMJHG5678 P0300: Multiple Engine Misfire Detected. fought this problem with this car before. first look at it 6 months ago. car came not running kept tring and finlly started. misfire heavy on 1 3 and 5 cylinder. then after a while just miss on 5 cylinder constant . had spark injection pulse and compression th... |
August 26, 2009 | |
| 2001 Chevrolet Silverado 2500 HD 6.0L Misfire, MIL Lamp on VIN: 1GCHK23U21 P0300: Multiple Cylinder Misfire Detected. ... We replaced the engine in a 2001 Chev 2500hd 6.0 w/a used engine(54k miles--truck has 244k)-the engine came from a 05/06 truck. The old engine had a missfire before but we didn't check it due to oil pressure problems and internal noises in valve train. We ... |
August 27, 2009 | |
| 2000 Chevrolet Camaro 3.8L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 2G1FP22K1Y P0300: Multiple Engine Misfire Detected. Thanks for any help. The engine backfires through the intake manifold on snap throttle. Little rough on cold start but clears up when warm, about 160 degrees. Coils all fire but computer shows misfires on all cylinders, but #4, 3, and 5 are the worst. Injector... |
August 31, 2009 |
