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P0300 Diagnostic Trouble Code Discussion for March 2010

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
1996 Chevrolet C1500 5.0L Poor Idle Quality, Misfire, MIL Lamp on
P0300: Multiple Cylinder Misfire Detected. after replacing lower intake manifold gaskets to repair coolant leak, engine runs rough. Distributor is timed correctly, cam retard is 0 degrees a idle, 27 degrees at 2000 rpms, truck runs like it has 2 plug wires crossed but all are correct. it's almost like ...
March 01, 2010
2001 Porsche 911 Carrera 4 3.4L Poor Idle Quality, Stall VIN: WPOAA29971
P0300: . This is a car that was brought in originally for a steering calibration due to rack not being properly aligned after fuel tank removal due to rodent damage. I now have a cold start running problem that is eating me alive and Identifix as well.This car will usu...
March 01, 2010
2000 Volkswagen Passat GLS 2.8L Excessive Emissions, Misfire VIN: WVWMD23B5Y
P0300: random misfire. please help vw techs. i have a fine vehicle that came in with 16 dtc's wrote all codes down and cleared codes. advised customer we would address the codes as they came back in computer. the 4 codes listed where the ones that reappeared where the ones listed. i...
March 01, 2010
2003 Ford Ranger XL 3.0L No Start VIN: 1FTYR44V93
P0300: random misfire. vehicle towed in as a no start. fuel pressure = good injector pulse = good but no spark! replaced crankshaft sensor still no spark. checked voltage at crankshaft sensor correct ignition coil has correct voltage also but on vantage there is no firing signals to...
March 02, 2010
2000 Chevrolet Silverado 2500 6.0L shifting out of OD VIN: 1GCGK29U4Y
P0300: Multiple Cylinder Misfire Detected. ... overdrive intermitenly, and will not shift back into overdrive until you shut off the key and restart thr truck. The owner says it has been doing it for a couple of months. I scaned it and the only code is a P0300 random misfire, and the owner said it has ...
March 03, 2010
2003 Toyota Corolla S 1.8L Poor Idle Quality, MIL Lamp on VIN: 2T1BR32E13
P0300: Multiple Cylinder Misfire Detected. No idle cold and low idle hot. Codes for multiple misfire all cylinders and evap psi sensor codes. I have checked basics. No intake leaks. Plugs look good. I have cleaned throtle body because throtle was sticky. Any help much apreciated. Thanks Gary
March 03, 2010
2002 Other European vanquish 5935CC Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: UNKOWNVINN
P0300: miss. ok alldata has zero info on this car and iatn tech help has very limited info also. this car belongs to very good customer with a fleet of trucks, plus he is a shop friend. so i dont want to send him back to the dealer on this. this car has misfires on multipl...
March 05, 2010
2004 Chevrolet Avalanche 1500 5.3L Excessive Emissions, No Start, Misfire VIN: 3GNEK12T14
P0300: Multiple Cylinder Misfire Detected. ... transmission shop that we work with quite a bit. It was brought to them for a random misfire concern which grew bad enough while with them that it wouldn't stay running. Scanned P0300 dtc. Pulled spark plugs and found them soaked with what I assumed to be ...
March 08, 2010
1998 Chrysler Intrepid 3.2L Hard Start VIN: 2C3HH56J0W
P0300: Multiple Cylinder Misfire Detected. Help!!! Have problem vehicle. Any ideas... Customer complaint; vehicle run ruff (engine missfire) or even not start after hot soak (15 to 20 min) after cooling fan has cycled. Customer issue started within past month. Fuel test/sample Ok (no water), Replaced M...
March 10, 2010
2003 Jaguar X-Type 2.5L No Start, Cuts out, Misfire, MIL Lamp on VIN: SAJEA53CX2
P0300: random missfire. when the we try to start the engine, it crancks for a while and sometimes start normal and keep about 1400 rpm. as soon the rpm drop below 1000 rpm the engine stall. if we try to restart crancking for a while it may start again and if we keep the throtle open ...
March 10, 2010
2005 Volkswagen Jetta 2.5 2.5L Hesitation VIN: 3VWSF71K85
P0300: Misfiring cyl.4. Hi Fellows, After replacing 2 sensors and the problem is still occurs. We think there's something serious here. So we checked the database and found the same issue with same codes and symptom. Whoever ran to this can tell us ,what parts are involve and labor t...
March 10, 2010
1997 Dodge Dakota Sport 3.9L Hesitation, Surge VIN: 12H3H3INFH
P0300: Multiple Cylinder Misfire Detected. This truck came in a week ago with a complaint of back firing and surging and bucking when going 45 and up and misfires when you rev it up at idle. when watching the obd2 misfire monitors, when it misfires it is mostley on cyliders 1,3,and 5. I have checked ev...
March 12, 2010
2006 Ford Taurus SEL 3.0L extended crank hot VIN: 1FAFP56U46
P0300: random misfire. thanks in advance for the help. this car came in a week ago with the compliant of extended crank after heat soak, and upon restarting,smell VERY rich and stumbles for a second or two. could not reproduce the symtoms. changed fuel filter, tested the fuel system...
March 12, 2010
1999 Audi A4 2.8L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: WAUDD28DXX
P0300: Random misfire. I work on thees all the time but this one is a hard case. Misfire on cylinders 1,2,4 and 6. this is a slight misfire on thees four cylinders, not a dead misfire. poor idle noticeable poor acceleration and a blinking mil lamp. removed the injector rail and saw ...
March 15, 2010
2004 Chevrolet Silverado 2500 HD 6.0L Poor Idle Quality, MIL Lamp on VIN: 1GBHC24U24
P0300: Multiple Engine Misfire Detected. just pulled heads and had plug holes fixed now at idle cylender number 2 and 6 are missing as soon as u come off ide missfire data goes to zero i swaped coils injectors plugs and wires eventthough they are new and there was no change [...] 02s from side to sid...
March 15, 2010
1999 Dodge Ram 1500 Truck 5.9L Hesitation VIN: 34ERTTYYUI
P0300: Multiple Cylinder Misfire Detected. Vehicle bogs down, wont go past 35 mph. Misfire trouble codes were present of course. Fuel pressure at 45 consistantly even when bogging down. Map readings good and tried new map sensor, 18 inches at idle down to zero on full throttle. Map volts around 1.8 ...
March 15, 2010
2002 Dodge Intrepid SE 2.7L Poor Idle Quality, Hesitation, MIL Lamp on VIN: 2B3HD46R32
P0300: Multiple Cylinder Misfire Detected. Hey fellow techs, got a 2.7 here with misfires on bank 2. It misses for about 30 seconds then runs good for about 5 seconds. You can watch the misfire data & see 2,4,6 rack up counts & then it stops. While the misfires are happening the inj on time for...
March 15, 2010
1996 GMC Jimmy 4.3L Misfire, MIL Lamp on VIN: 1GKCS13W6T
P0300: Multiple Cylinder Misfire Detected. We inherited this from another local shop... It seems to misfire mostly at idle raising the rpm to 2500 to 3000. Fuel pressure is within spec and doesnt drop off when the car is shut off. I haven't done an injector balance test yet. The misfire jumps to almost...
March 15, 2010
1997 GMC K1500 Sierra SL 5.0L Misfire VIN: 1GTEK14M1V
P0300: Multiple Cylinder Misfire Detected. random missfire code.no miss realy felt when driving but computer still counts missfires.have replaced crank sensor,egr gasket,plugs,wires,cap,rotor,new distributer,intake manifold gaskets.set cam retard to o degrees at 2ooo rpms.vehicle seems to go down the r...
March 15, 2010
1999 Audi A4 2.8L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: WAUDD28DXX
P0300: Random misfire. I work on thees all the time but this one is a hard case. Misfire on cylinders 1,2,4 and 6. this is a slight misfire on thees four cylinders, not a dead misfire. poor idle noticeable poor acceleration and a blinking mil lamp. removed the injector rail and saw ...
March 16, 2010
2006 Hyundai Sonata GL 2.4L Misfire VIN: 5NPEU46F26
P0300: Multiple Misfire Detected. ... been here. cust concern of misfire at idle w/ses(p0300). unable to duplicate until this visit-cust brought it while misfire occuring and did not shut it off until i looked at it(cust states if shut off it will stop misfire) use modis to cancel cyl's. found...
March 16, 2010
2000 Isuzu Rodeo LS 3.2L Misfire VIN: 4S2CK58W4Y
P0300: Multiple Cylinder Misfire Detected. Guys this rodeo runs good but the right bank shuts down sometimes. You can unplug every coil on the right bank and it don't do nothing runs the same. The owner said he change every sensor from the old motor that ran good. Including the computer and module on t...
March 16, 2010
1997 Kia Sportage 2.0L Poor Idle Quality, Hesitation, Surge, Misfire, Poor Fuel Economy, MIL Lamp on VIN: KNDJA7232V
P0300: Random Cylinder Misfire Detected. ... p0300, p0301, and a p0302. Spark is okay. Have pulse as well. Injectors are clicking. Vacuum is steady. Compression is good. Problem happens at random start-ups / test drives. I sprayed some carb cleaner into one of the vacuum ports and the idle smoothed o...
March 16, 2010
2006 Chevrolet HHR LS 2.2L Poor Idle Quality, Hesitation, Misfire VIN: 3GNDA13D06
P0300: Random Misfire Detected. This is used car at our dealership. I was brought to us with a MIL and runs rough complaint. There are no fault codes except for a random misfire. It feel like the EGR is stuck open but it isn't equipped with an EGR. Misfire data at idle shows a constant misfi...
March 17, 2010
1997 Kia Sportage 2.0L Poor Idle Quality, Hesitation, Surge, Misfire, Poor Fuel Economy, MIL Lamp on VIN: KNDJA7232V
P0300: Random Cylinder Misfire Detected. ... p0300, p0301, and a p0302. Spark is okay. Have pulse as well. Injectors are clicking. Vacuum is steady. Compression is good. Problem happens at random start-ups / test drives. I sprayed some carb cleaner into one of the vacuum ports and the idle smoothed o...
March 17, 2010
2001 Saturn SL2 1.9L Surge, Cuts out, Stall, Misfire VIN: 1G82K52771
P0300: Random Misfire Detected. Hi everybody I have a saturn that is giving me trouble.It came in complaining of bucking and stalling and wanted a tune up.I felt it drop a cylinder and the check engine light was on.The 300 code was a plug wire letting spark go to ground 65k ohms put plugs an...
March 17, 2010
2005 Dodge Magnum SXT 3.5L Misfire VIN: 2D4FV48V45
P0300: multi cylinder missfire. Vehicle had a missfire and had the tsb for exhaust valve rotators installed. Vehicle was fine for a month or so and came back in with missfire. Found some cylinders missfiring, especially #2. swapped injectors, coil, plugs and still missfire on #2. Found on te...
March 18, 2010
1998 Lexus LS400 4.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: JTHBH28FXW
P0300: Multiple Cylinder Misfire Detected. Need Toyota/Lexus gurus help. This one has stumped me. This vehicle came in previously with an alternator dead. The lady said the mil was on before we changed the alternator but the battery was dead and checked out with a dead cell. The next day she came back ...
March 18, 2010
2002 Volkswagen Passat GLS 4 Motion 2.8L noise VIN: WVWYH63B22
P0300: random/multiple cylinder misfire. Hi All, Last month, the owner brought this VW in after a few weeks of missed appointments. His complaint was no power and the check engine light was on and or flashing. It was sort of a no-brainer. misfire codes for most of the cylinders, the passenger side ca...
March 18, 2010
1996 Buick Park Avenue 3.8L No Start, Misfire, MIL Lamp on VIN: 1G4CW52K1T
P0300: Engine Misfire Detected. Hi Guys, I'm in serious need of some help here!!! This might be a little long but I'm going to try and include everything. When the car came in it started and seemed to be running normal while cold. I took it for a test drive and all was well until it shifted ...
March 19, 2010
2006 Chevrolet Silverado 1500 LS 4.3L MIL Lamp on VIN: 1GCEC14X56
P0300: Multiple Cylinder Misfire Detected. this car is giving me a fit. Found the cap and rotor button had not been changed. But the truck still wants to run funny. The MAF code stays with a new MAF installed. Bank 2 is where all of the misses are occuring. Please help
March 19, 2010
2001 Saturn SL2 1.9L Surge, Cuts out, Stall, Misfire VIN: 1G82K52771
P0300: Random Misfire Detected. Hi everybody I have a saturn that is giving me trouble.It came in complaining of bucking and stalling and wanted a tune up.I felt it drop a cylinder and the check engine light was on.The 300 code was a plug wire letting spark go to ground 65k ohms put plugs an...
March 19, 2010
1999 Dodge Caravan 3.0L Poor Idle Quality, Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 2B4FP2530X
P0300: Multiple Cylinder Misfire Detected. I have a gem here. Gut says PCM. This van has multiple codes. Has severe misfire even at steady speeds(ALMOST all the time) but occasionally will run smooth at steady cruise. It starts and idles great. Under accel will usually fall flat on its face and as you ...
March 20, 2010
2001 GMC Sonoma SL 4.3L Hesitation, Stall, MIL Lamp on VIN: 1GTD19WX1K
P0300: Multiple Engine Misfire Detected. This issue only happens about once a week or less and is always at highway speeds. The vehicle will begin to loose power, slow and possibly stall. Once on the side of the road and waiting a few minutes he can drive on with no problems. This has been happening ...
March 20, 2010
2004 GMC Sierra 1500 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GTEK14T74
P0300: Multiple Cylinder Misfire Detected. I replaced the intake manifold gaskets and the fuel pump. The pump was in spec on pressure but customer chose to replace it as a preventative repair. The intake gaskets were replaced because of suspicsion of a vac. leak and I swear I still hear it on the drive...
March 20, 2010
2002 Buick Regal LS 3.8L No Start, Stall, Misfire VIN: 2G4WB55K72
P0300: Multiple Engine Misfire Detected. I have been banging my head on this 1. it seems when it gets hot it shuts down an comes up with po300.ihave replaced the cat and plugs ,wires, ckp sensor still no difference an after installing the cat it seemed to be worse i heat tested the cat an it was abou...
March 22, 2010
2001 Mercedes-Benz C240 2.6L low power VIN: WDBRF61J31
Greetings All, This like new car came to us from a body shop after a minor repair with the complaint of low power when accelerating. Disconnected maf and car ran better, replaced with new bosch , no help. Checked exhaust backpressure on both banks,had 1psi un...
March 22, 2010
2002 Dodge Intrepid SE 2.7L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 2B3HD46R92
P0300: Multiple Cylinder Misfire Detected. vehicle came in with misfire, rough idle and hesitation at all times. retrieved po340, po152, and po300. replaced dead bank 2 sensor 1 o2 sensor. replaced cam sensor, sprak plugs. also replaced intake gaskets (all0 after spray determined they were leaking on b...
March 23, 2010
2004 Isuzu Rodeo S 3.5L Poor Idle Quality, Surge, Misfire VIN: 4S2DM58Y44
P0300: Multiple Cylinder Misfire Detected. Hey everyone. Have this '04 Isuzu Rodeo DI 3.5l. We are an Isuzu dealership and I have my Shop foreman, who is a Master Certified Isuzu Tech working on this. Using Isuzu Scanner. We are intermitently losing the left bank cylinders #2,4,&6. Only starts miss...
March 23, 2010
2001 Mercedes-Benz C240 2.6L low power VIN: WDBRF61J31
Greetings All, This like new car came to us from a body shop after a minor repair with the complaint of low power when accelerating. Disconnected maf and car ran better, replaced with new bosch , no help. Checked exhaust backpressure on both banks,had 1psi un...
March 23, 2010
2004 GMC Sierra 1500 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GTEK14T74
P0300: Multiple Cylinder Misfire Detected. I replaced the intake manifold gaskets and the fuel pump. The pump was in spec on pressure but customer chose to replace it as a preventative repair. The intake gaskets were replaced because of suspicsion of a vac. leak and I swear I still hear it on the drive...
March 24, 2010
2003 Land Rover Discovery SE 4.6L backfiring VIN: SALTW14493
P0300: Random Misfire. Car came in with Check Engine light on and under hard acceleration back firing bad thru intake manifold Checked codes and did a full tune up (needed very bad) We replaced timing chain because it was very loose and we assumed it jumped timing.That didn't help.W...
March 24, 2010
2000 Volvo V70 X/C AWD 2.4L Hesitation, Surge VIN: YV1LZ56D1Y
P0300: Random Multiple Cylinder Misfire Detected. Hi, I apologize from the start! This is a long one. I have a 2000 Volvo V-70XC AWD Which started studdering/hesitating/surging upon slight acceleration approximately 1 year ago maybe a bit longer by a month or so. It was rather subtle & hard to notice at t...
March 24, 2010
1998 Chevrolet S10 2.2L Misfire VIN: 1GCCS1944W
P0300: Multiple Engine Misfire Detected. misfire at idle to off idle with code no.4 misfire someone has replaced plugs/wires if add acetylen threw intake misfire goes away ck. for vac.leaks none inj.puls width same on all listen to inj.is working replaced inj. misfire gone on no.4 cyl.but now no.3cyl...
March 25, 2010
2005 Ford F-250 Super Duty XLT 5.4L Poor Idle Quality, Surge, Stall, Misfire VIN: 1FTNF21515
P0300: Random Misfire Detected. The vehicle came in for no power problem. It was misfiring bad. We replaced the coils & plugs on cyl. 1,2,& 3 along with the fuel filter. (It had water in one of the plug holes & moisture in the pcm connectors.) The misfire is gone but still runs p...
March 26, 2010
1999 Chevrolet C1500 Suburban 5.7L Misfire VIN: 1GBEC16RXX
P0300: Multiple Cylinder Misfire Detected. help
March 30, 2010
1997 Oldsmobile Cutlass Supreme SL 3.1L Misfire VIN: 1GH52MXVF3
P0300: Multiple Engine Misfire Detected. This thing came in with an intake backfire it has a heavy misfire on #1 but all are misfiring some. so far I've ran fuel pressure, injector flow and drop, cyl leak down,and compression tests. All with good results. The ignition system is throwing the spark in ...
March 31, 2010