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P0300 Diagnostic Trouble Code Discussion for March 2011

Multiple Misfire Detected *

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Trouble Ticket Help Requests for DTC P0300

	Help Request	Posted
	2006 Ford Freestyle SEL 3.0L Poor Idle Quality, Surge, Misfire VIN: 1FMZK02166 P0300: Random Misfire. ... it had a p0174 p0300 p0301 p0302 and p0303. Checked for a vacuum leak found none. Hooked up the smoke machine and only found smoke leaking out of the egr valve. I removed the intake to check the plugs. some one replaced t...	March 01, 2011
	2002 GMC Yukon Denali 6.0L Misfire, MIL Lamp on VIN: 1GKEK63U62 P0300: Multiple Cylinder Misfire Detected. ... light, found code p0300, scanned and found all cylinders had some misfiring. Checked spark plugs and they were due for replacement. Installed plugs with new wires. customer drove for a few daysw and returned with CEL back on. Scanned and found p0300, check...	March 01, 2011
	2003 Jaguar S-Type 4.2L Excessive Emissions, Poor Idle Quality, Misfire VIN: SAJEA01U03 P0300: Random / and cyl2 cyl4 cyl6 cyl8. Keep in mind this is a new used car for a customer that bought the vehicle in this condition, so I have no history of when/what symptoms started. Vehicle was brought in with restricted performance light on, rough idle condition, and a rubbed through radiator h...	March 01, 2011
	2000 Nissan Pathfinder SE 3.3L other VIN: JN8AR07Y4Y P0300: Multiple Misfire Detected. This vehical was towed into our shop for a no start, upon inspection coil output was approx 5k volts we observed that the ign parts were original @ 153K we informed the owner of the failure and caused the coil to burn through. after spending about 4 hours soak...	March 01, 2011
	2001 Toyota Avalon XLS 3.0L Misfire, MIL Lamp on VIN: 4T1BF28B51 P0300: Multiple Cylinder Misfire Detected. Help with this cold intermittent misfire bank 1... Only on first start of the day, runs rough until closed loop, then STF turn B1 -18 B2 0 and runs great. It's like it's very rich and runs poor until fuel trim is corrected for B1. I have checked VVt solenoids ...	March 01, 2011
	1996 Chevrolet S10 4.3L Poor Idle Quality, Hesitation VIN: 1GCCS19X3T P0300: Multiple Engine Misfire Detected. thanks for helping. this vehicle brought to us after multiple shops could not repair. thy have tried tune ups and even told customer it was in the trans. the vehicle has no power and very slow acceleration. it acts like a retarded timing issue. we checked the ...	March 02, 2011
	2005 Chevrolet Cobalt LT 2.2L Misfire VIN: 1G1AZ54F95 P0300: Multiple Engine Misfire Detected. Help!!! this car is a nasty one. Been in and out of shop with engine missing problem. Every time it comes in it has no spark to cylinder #2 and #3. First time i replaced all spark pluges, ignition coil and ignition module all after market parts. Second time in...	March 02, 2011
	2008 Chevrolet Silverado 1500 LT 5.3L MIL Lamp on VIN: IGCEC19088 ... CIRCUIT codes for the Bank 1 Sensor 2 Oxygen sensor as well as a p0300 engine misfire code. I never could duplicate any misfires so I replaced the B1 S2 O2 sensor. Cleared the codes and test drove with 2 good ignition cy...	March 02, 2011
	1997 Buick LeSabre Custom 3.8L Misfire, MIL Lamp on VIN: 1G4HP52K4V P0300: Engine Misfire Detected. ... miss-pullled valve cover and found #5 intake rocker loose-bad lifter. Pulled intake and could not get lifter out the top. pulled engine and removed cam lifter came out bottom. put in new cam and lifters-chain ok. now car has low power and low vac.15inc at ...	March 03, 2011
	2004 Chrysler Concorde LXi 3.5L Hesitation, Misfire, MIL Lamp on VIN: 2C3HD36M84 P0300: Multiple Cylinder Misfire Detected. hey guys, got this chrysler 3.5 that has us stumped. i replaced a bad #2 coil and customer left for a week. came back in with the cel on again but this time #1 and 3 cylinders are misfiring. only at idle. smoke tested and found no leaks. plugs are correct and ...	March 03, 2011
	2006 Chevrolet Express 3500 6.0L Misfire VIN: 1GCHG39U06 P0300: Multiple Cylinder Misfire Detected. Have misfires on 2,4,6,8 only. Number 6 is the worse.	March 04, 2011
	2000 Jeep Cherokee Classic 4.0L Hesitation, Cuts out, Misfire VIN: 1J4FF48S8Y P0300: Multiple Cylinder Misfire Detected. Hello again ALL, This Jeep indicates misfire and I have very rarely caught a couple light misfires on #3 cylinder. I suspect the #3 fuel injector is the problem but my bigger concern is customer states that engine ran so poorly that it barely moved at all. Th...	March 04, 2011
	2007 Nissan Frontier SE 4.0L Excessive Emissions, Poor Idle Quality, Hesitation, Stall, Misfire, MIL Lamp on VIN: 1N6AD07W97 P0300: Multiple Misfire Detected. This Nissan runs lousy. It has a real loss of power and random misfire. It feels like a cat is clogged or low fuel pressure. What has me really concerned is a high speed rattling sound that you can feel in the intake manifold at about 2500 rpm. The noise sound...	March 07, 2011
	2007 Chevrolet Impala LT 3.9L Poor Idle Quality, Misfire VIN: 2G1WC58R17 P0300: Multiple Engine Misfire Detected. came in with cel. code p0300. customer stated no work has ever been done. I suggested a maintenance tuneup. plugs and wires. after that it still has a misfire. no 4 is the most. a few others have just a couple misfire hits, but no.4 is in the 25000 range. curr...	March 08, 2011
	1997 Oldsmobile LSS 3.8L No Start, Poor Idle Quality, Stall, Poor Fuel Economy VIN: 1G3HY52K4V P0300: Engine Misfire Detected. Engine is fuel hydro-locking. cts,map,normal-all injectors are being pulsed,noid looks normal. If we remove plugs & blow out cyls.,we can get eng. to run briefly. Inj. puls width is 7-8 mlsec at idle. Fuel psi is low ,as could be expected,5 to 10 at first,...	March 08, 2011
	2002 Pontiac Grand Prix GTP 3.8L Misfire, MIL Lamp on VIN: 1G2WR12192 P0300: Multiple Cylinder Misfire Detected. Hello all, thanks in advance for the advice. Car came in missing out on cyclinder #5 at idle. Once you give it some gas the miss goes away. I have swapped coils, wires, plugs, injectors and the miss always stays with #5. I am thinking maybe an internal vacuum ...	March 08, 2011
	2007 Chevrolet Impala LT 3.9L Poor Idle Quality, Misfire VIN: 2G1WC58R17 P0300: Multiple Engine Misfire Detected. came in with cel. code p0300. customer stated no work has ever been done. I suggested a maintenance tuneup. plugs and wires. after that it still has a misfire. no 4 is the most. a few others have just a couple misfire hits, but no.4 is in the 25000 range. curr...	March 09, 2011
	2005 Ford E-150 5.4L Cuts out, Misfire, MIL Lamp on VIN: 1FTPF12555 P0300: random missfire. truck came in running like crap.replaced fuel filter checked press. with manual gauge in spec.checked on the road it is in spec.we checked convertors and they were screwed we replaeced them and it runs good till you hammer it and then it pops like hell and sur...	March 09, 2011
	1997 GMC Savana 2500 4.3L Hesitation, Surge, Misfire VIN: 1GTFG2FW6V P0300: Multiple Cylinder Misfire Detected. when this engine is cold the idle is perfect but when you go to speed up slowly like normal driving this thing almost stalls and will not rev up at all unless you mash it then it runs like a deer. now when it shifts to a higher gear and idles down, same thing ...	March 09, 2011
	2007 GMC Yukon Denali 6.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GKFK63847 P0300: Multiple Engine Misfire Detected. What up guys? I got a Denali that very intermittenty the desired cam angle and actual won't match. I drove it home last night and once the desired was 15〫and actual was 0〫and ran fine. I drove it home today and after a 20 mile drive pulle...	March 09, 2011
	2003 Hyundai Accent GL 1.6L Misfire VIN: KMHCF35C43 P0300: Multiple Misfire Detected. I check tps sensor test good replace spark plugs & wires replace crank sensor because its the trigger for coils check for vacuum leaks found none car will run good for weeks at a time with no misfire.thanks for your help.	March 09, 2011
	2007 GMC Yukon Denali 6.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GKFK63847 P0300: Multiple Engine Misfire Detected. What up guys? I got a Denali that very intermittenty the desired cam angle and actual won't match. I drove it home last night and once the desired was 15〫and actual was 0〫and ran fine. I drove it home today and after a 20 mile drive pulle...	March 10, 2011
	2007 Nissan Frontier SE 4.0L Excessive Emissions, Poor Idle Quality, Hesitation, Stall, Misfire, MIL Lamp on VIN: 1N6AD07W97 P0300: Multiple Misfire Detected. This Nissan runs lousy. It has a real loss of power and random misfire. It feels like a cat is clogged or low fuel pressure. What has me really concerned is a high speed rattling sound that you can feel in the intake manifold at about 2500 rpm. The noise sound...	March 10, 2011
	2002 Cadillac Seville STS 4.6L Misfire, MIL Lamp on VIN: 1G6KS54Y02 P0300: Engine Misfire Detected. ... fronD another shop, they replace 2 coil packs , fuel pump ,plugs , fuel filter, and maf it have a p0300 randon misfire THE MISFIRE ONLY HAPPEN BETWEEN 1300 RPM AND 2000 RPM THE CAR CAN BE IN PARK OR UNDER LOAD , the fuel STFT are ok +-4 at idle and good un...	March 11, 2011
	2004 Chevrolet Express 3500 6.0L Misfire, MIL Lamp on VIN: 1GAHG39U64 P0300: Multiple Cylinder Misfire Detected. ... dtc's p0174 system too lean (bank 2),p0175 system too rich (bank 2)and p0300 multiple/random misfire detected.test drove the van while cold and hot conditions and could not duplicate customer complaint of lack of power...inspected tune components,everythin...	March 11, 2011
	2005 Ford E-150 5.4L Cuts out, Misfire, MIL Lamp on VIN: 1FTPF12555 P0300: random missfire. truck came in running like crap.replaced fuel filter checked press. with manual gauge in spec.checked on the road it is in spec.we checked convertors and they were screwed we replaeced them and it runs good till you hammer it and then it pops like hell and sur...	March 11, 2011
	1998 Audi A6 Quattro 2.8L Poor Idle Quality, Misfire VIN: WAUBA24B0W ... misfire with code p0300,p0301,p0302,p0303. we found vacuum leaks on the intake so we replaced pipes that are cracked and performed a tune up, replaced spark plugs,ignition coil, wires. After the tune up car run fine customer picked up next day same codes c...	March 14, 2011
	2004 Mitsubishi Montero Sport LS 3.5L Poor Idle Quality, Misfire VIN: JA4LS21R04 P0300: Random Misfire Detected. Vehicle came into our shop with coolant leaking from the rear of the right cylinder head gasket. Removed both cylinder heads and replaced gaskets. Engine ran fine before the repair. After the repair, it has a slight rough idle and a slight back fire in the exh...	March 14, 2011
	2006 Nissan Frontier SE 4.0L Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1N6AD06U76 P0300: Multiple Misfire Detected. ... did tune up 2 month ago we had just bad luck. First check engine light come ON with low catalytic efficiency on bank 2. Replace cat, good for few weeks. Now suddenly car have no power and can`t rew more than 4500 rpm. Engine light is flashing -P0300- engin...	March 14, 2011
	1999 Chevrolet K1500 Suburban 5.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 3GNEC16RXX P0300: Multiple Cylinder Misfire Detected. I have read a number of responses to PO300 in this kind of vehicle and trying to determine if this is a sticking valve problem or something simple. Because of the year and miles if it is a sticking value it would be an engine replacement job and not just rebui...	March 15, 2011
	2004 Mitsubishi Montero Sport LS 3.5L Poor Idle Quality, Misfire VIN: JA4LS21R04 P0300: Random Misfire Detected. Vehicle came into our shop with coolant leaking from the rear of the right cylinder head gasket. Removed both cylinder heads and replaced gaskets. Engine ran fine before the repair. After the repair, it has a slight rough idle and a slight back fire in the exh...	March 15, 2011
	2005 Chevrolet Impala 3.4L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 2G1WF52E45 P0300: Multiple Cylinder Misfire Detected. This vehicle came in running very rough and had a noticible vacuum leak (whistle) a visual inspection noticed a exhaust blackening under the intake plenum near the throttle that melted part of injector wiring pvc vac tube partialy melted a injector, coolant te...	March 16, 2011
	2003 Jaguar S-Type 4.2L Excessive Emissions, Poor Idle Quality, Misfire VIN: SAJEA01U03 P0300: Random / and cyl2 cyl4 cyl6 cyl8. Keep in mind this is a new used car for a customer that bought the vehicle in this condition, so I have no history of when/what symptoms started. Vehicle was brought in with restricted performance light on, rough idle condition, and a rubbed through radiator h...	March 16, 2011
	2005 Hyundai Tucson GL 2.0L Poor Fuel Economy VIN: KM8JM72D25 P0300: Multiple Misfire Detected. This vehicle had a p0305 code originally, we replaced ignition wires, performed carbon clean, checked plugs etc, erased code. Ran well since then, over a week, after sitting overnight, started to run rough, codes above showed up, all on same bank, we performed...	March 17, 2011
	2001 Toyota Tacoma DLX 3.4L Surge, Misfire VIN: 5TEHN72N31 P0300: Multiple Cylinder Misfire Detected. This TRD supercharged Taco has been in our shop before. Ran very strong, 5-6 lbs boost, all stock. Customer somehow managed to break 2 rods and trash the engine. We install new Toyota short block, replaced several valves, had valve job performed on heads, reas...	March 17, 2011
	2005 Hyundai Tucson GL 2.0L Poor Fuel Economy VIN: KM8JM72D25 P0300: Multiple Misfire Detected. This vehicle had a p0305 code originally, we replaced ignition wires, performed carbon clean, checked plugs etc, erased code. Ran well since then, over a week, after sitting overnight, started to run rough, codes above showed up, all on same bank, we performed...	March 18, 2011
	2007 Ford Fiesta 1.3L Misfire VIN: WFOHXXGAJH P0300: random misfire. Hi guys, Have this Fiesta here which has repeated problems with ignition coil.The coil starts arcing and causing misfires every 5k kilometers or so.Replacing coil will help for other 5k kilometers then its the same story again.Also replaced plugs and wires wit...	March 21, 2011
	2005 Volkswagen Jetta 2.5 2.5L MIL Lamp on VIN: 3VWSF71KX5 P0300: Multiple cyl misfire. ... complaint of start and stall or shut down while driving and cel on with P0101, P0102,P0304, and P2403 codes. We were not addressing the evap code at that time. I installed a VW Maf and cleared codes. Stall issue is corrected. On March 4 the car returned wi...	March 22, 2011
	2001 Cadillac Seville SLS 4.6L Misfire VIN: 1G6KS54Y61 P0300: Engine Misfire Detected. engine missfires for 10 to 20 seconds after hot restart. ok on cold starts, and ok after missfiring "spell", until next stop, and next hot restart.	March 23, 2011
	2002 Jaguar X-Type 3.0L Misfire, MIL Lamp on VIN: SAJEA51C82 I have a jag that has been here multiple times for the same codes, misfires, cylinder 1-3-5 (bank 1) appears to run normal to a certain degree over 2000 rpms, fuel trims in closed loop indicate that bank 1 is full lean, and bank 2 is full rich. We dropped the ...	March 23, 2011
	2008 Jeep Commander Overland 5.7L Misfire VIN: 1J8HG6821C P0300: multiple misfire. This car has an occasional misfire at idle with it becoming more prevalent as you accelerate. This car can run well for a period of time (5-10 miles). If you watch the DRB you can monitor multiple misfires with #6 being by far the worst. MDS controlled cylinde...	March 23, 2011
	2000 Mercedes-Benz E55 AMG 5.5L Misfire, MIL Lamp on VIN: WDBJF74J6Y P0300: Ramdom misfire. I can't really feel it missing feels verl slight under medium throttle seems to run ok full throttle. Intermittantly under medium throttle it will just shut down the entire left bank of cylinders until you shut it off and restart. New plugs, one plug wire and ...	March 23, 2011
	1998 Nissan Altima GXE 2.4L Misfire, MIL Lamp on VIN: 1N4DL01D1W P0300: Multiple Misfire Detected. Engine has a dead miss on number 4 cylinder. I removed spark plugs and found the number 4 is covered in oily soot. I did a compression test and found all cyl's around 150. I next checked injector resistance-11.5 just like the other three. Pulled the injector t...	March 23, 2011
	1998 Pontiac Trans Sport Montana 3.4L Excessive Emissions, Poor Idle Quality, Stall, Misfire, MIL Lamp on P0300: Multiple Cylinder Misfire Detected. ok guys, please help!! car came in shop with coolant leak. dye test...head gasket. change head gaskets and start up. sounds like timing belt broke when turning over. found pushrods bent. the short ones??? if it was the long ones i would say installed wrong, bu...	March 23, 2011
	1996 BMW 328i 2.8L Hesitation, Misfire, MIL Lamp on VIN: WBACD4321T P0300: Multiple misfire. For all BMW techs need help with this car has rough idle every two or three minutes and emissions go high almost 2500 ppm and hesitates for a while for about half a minute and then the emissions go down after that runs normal for another three minutes then emi...	March 24, 2011
	1998 Pontiac Trans Sport Montana 3.4L Excessive Emissions, Poor Idle Quality, Stall, Misfire, MIL Lamp on P0300: Multiple Cylinder Misfire Detected. ok guys, please help!! car came in shop with coolant leak. dye test...head gasket. change head gaskets and start up. sounds like timing belt broke when turning over. found pushrods bent. the short ones??? if it was the long ones i would say installed wrong, bu...	March 24, 2011
	2005 Volkswagen Passat GLS 4 Motion 1.8L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: WVWDD63B95 P0300: Random cylinder misfire. Hi, I can't believe I am asking such a seemingly simple question. But after 3 hours I cannot find the PCV valve on this car. I have googled it, searched Alldata, and looked all over the vehicle. Everything says it is under the intake manifold. I still cant fin...	March 24, 2011
	1999 Nissan Maxima GLE 3.0L Hesitation, Misfire, Poor Fuel Economy, MIL Lamp on VIN: JN1CA21A5X P0300: Multiple Misfire Detected. This car came in with the check engine light on with poor fuel economy,hesitation going up hills or under load.It idles just fine,you cannot see or feel a missfire.The customer wanted all plugs changed,they needed it.I change the air filter too it was really d...	March 27, 2011
	1996 Cadillac Seville SLS 4.6L Poor Idle Quality, Extended crank time VIN: 1G6KS52Y4T P0300: Engine Misfire Detected. ... because of a extended crank time when starting, about 5 to 10 seconds. It sputters a little before catching,also.It sometimes has a slightly rough idle. P0300 did not come back after clearing. I first though it was low fuel...	March 28, 2011
	1999 Cadillac Seville SLS 4.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G6KS54Y2Y P0300: Engine Misfire Detected. Ok well I hope someone out there has run in to this problem before.I have this Cadillac,1999 SLS it has misfire on cylinder #4 dead miss also has slight miss on #5 anyway I have tried everything I can think of to find the cause of this misfire,Came in with com...	March 28, 2011
	2003 Mazda Protege LX 2.0L Misfire, MIL Lamp on VIN: JM1BJ22503 P0300: Multiple Misfire Detected. Hey guys, I've got a 2003 Mazda Protege with a very intermittent misfire problem. The car came in with a po300 and a fuel filled charcoal canister. We replace the canister, purge solenoid, and vent solenoid. Problem with the canister solved and we assumed that...	March 28, 2011
	2003 Pontiac Grand Prix GT 3.8L Cuts out, Stall, Misfire, MIL Lamp on VIN: 1G2WP52K83 P0300: Multiple Cylinder Misfire Detected. This car has been to a couple of different shops they installed new spark plugs a new throttle position sensor that did not fix his problem.we have done a fuel pressure test as well as a volume test verified a compression test also tested ignition module and a...	March 29, 2011
	2001 Acura CL Premium 3.2L No Start, Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 19UYA42431 P0300: Multiple Misfire Detected. Hi all, Had a car come in, customer complained that randomly, while sitting at a stop light for 1 min or more, would run rough and die. Restart after few minutes. Scanned vehicle and found the P1071 fuel trim code. Cleared code drove car for a couple days and ...	March 30, 2011
	1999 Audi A8 Quattro 4.2L Poor Idle Quality, Hesitation, MIL Lamp on VIN: WAUBG34D3X P0300: random miss. ... retrieved 8 codes, the P0154 as well as several missfire codes P0300, P0301, P0305, P0306, P0307, P0308 and an couple of evap leak codes. Found B2S1 O2 sensor stuck at about 500mv. checked plugs and found them badly worn, c...	March 30, 2011
	2006 BMW 325xi 3.0L No Start VIN: WBAVD135X6 P0300: Random missfire. Thanks to all of you that take the time to read my help request. I have very limited experience with Bimmer's. I am thinking that I need to replace both camshaft sensors, but I am not sure why or if they actually are at fault here. It just seems strange to me ...	March 30, 2011
	2000 Dodge Dakota 3.9L MIL Lamp on VIN: 1B7FL26X6Y P0300: Multiple Cylinder Misfire Detected. What are we missing?next step is to check the flexplate but we might be reaching.how can I see what is making the codes appear without symptoms and at cruising speed. fuel trims are +- 8%.Thanks for your time, Thanks in advance for your help	March 31, 2011
	2004 GMC Sierra 1500 SLE 5.3L Poor Idle Quality, Misfire VIN: 2GTEK19T04 P0300: Multiple Cylinder Misfire Detected. This truck has a rough idle and a consistent misfire on #6 and a inconsistent misfire showing on #5. New wires & plugs, swapped coils with other cylinder with no change. There are TSBs for bad ground on head, alarm system interference, intake gaskets, crac...	March 31, 2011