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P0300 Diagnostic Trouble Code Discussion for April 2011

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
2002 Honda Accord EX 2.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: JHMCG65822
P0300: Multiple Misfire Detected. first thanks to all for the help. i have my dads 02 honda accord 4cyl 5spd. About 3000 miles ago it started skipping so i plulled the plugs and they were worn out. OE cap and rotor and wires as well 155k 0n them. so ii replaced cap rotor wires plugs. After doi...
April 03, 2011
1997 Buick LeSabre Custom 3.8L Misfire VIN: 1G4HP52K1V
P0300: Engine Misfire Detected. we have a 97 buick le sab, that is runing poor,is mising under load, we check the cat and looks like is ok,the only code tha i get is po300, plug, wires are good, fuelpump is new, fuel filter,new coils, new modul,i just dont know what is nex, on my scan tool t...
April 05, 2011
2006 Ford Explorer XLT 4.0L MIL Lamp on VIN: 1FMEU63E36
P0300: Multiple/Random Misfire Detected. This vehicle keeps returning with the above codes. Customer states that vehicle has always ran great and the light just comes on and stays on (does not flash). I have road tested the vehicle numerous times each time it has been in here and it has always ran gr...
April 05, 2011
1998 Oldsmobile Intrigue 3.8L Excessive Emissions, No Start, Misfire, MIL Lamp on, Floods VIN: 1G3WH52KOW
P0300: Engine Misfire Detected. First of all thanks for taking the time to read this. I have a strang one here. Car came in on the hook, owner stated car started running rough, and stalled. She attempted to restart it and said that a lot of white smoke came out of the exhaust. I checked for ...
April 05, 2011
2006 Ford Explorer XLT 4.0L MIL Lamp on VIN: 1FMEU63E36
P0300: Multiple/Random Misfire Detected. This vehicle keeps returning with the above codes. Customer states that vehicle has always ran great and the light just comes on and stays on (does not flash). I have road tested the vehicle numerous times each time it has been in here and it has always ran gr...
April 06, 2011
1998 Oldsmobile Intrigue 3.8L Excessive Emissions, No Start, Misfire, MIL Lamp on, Floods VIN: 1G3WH52KOW
P0300: Engine Misfire Detected. First of all thanks for taking the time to read this. I have a strang one here. Car came in on the hook, owner stated car started running rough, and stalled. She attempted to restart it and said that a lot of white smoke came out of the exhaust. I checked for ...
April 06, 2011
1998 GMC Savana 3500 5.7L Misfire VIN: 1GDHG31R9W
P0300: Multiple Cylinder Misfire Detected. Hi guys, just replaced both heads, new heads. Have misfire constantly cyl. 3,6 and sometimes on 2, set cam retard to 0" no help, checked dist. lined up on no 1 at tdc plugs and wires okay. Wondering if overtightened valves, tightened till no play then 360 ...
April 07, 2011
2003 Volkswagen Passat GLS 1.8L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: WVWPD63B63
P0300: random misfire. Car came in misfiring and barely running at idle. Car runs just great soon as you drive it or even if u bring revs off idle. Replaced plugs and then checked later and were fouled after not much running time at idle. LTFT 10% STFT 25% after a short 10 min drive...
April 07, 2011
2003 Audi A6 Quattro 2.7L Misfire VIN: WAULD64B73
P0300: Random misfire. Clutch and valve cover gaskets were replaced and vehicle was test driven and ran fantastic! The next day the customer came to pick up the car and it had a dead miss from start in cyl #6. Swapped coils and changed plugs but misfire still remains. Tested for pow...
April 08, 2011
2003 Chevrolet Tahoe Z71 5.3L Poor Idle Quality, MIL Lamp on VIN: 1GNEK13Z83
P0300: Multiple Cylinder Misfire Detected. We have this vehicle in that a dealership diagnosed a faulty cat on this vehicle. We replaced the cat with oe, cleared codes and then it was running poorly. My tech replaced the b2s1 with an oe part. We are having a problem with b2 running lean. ltft is at 25,...
April 12, 2011
2002 Chevrolet Blazer Xtreme 4.3L Misfire VIN: 1GNCS18WX2
P0300: Multiple Cylinder Misfire Detected. ... ses light on. Code p0300 found but only #6 had any miss counter. Replaced dist cap, rotor, wires and plugs. All were original. By then the thing had cooled down and it ran great long enough to get half way around the block. Then the ses light came back on ...
April 13, 2011
2001 Chevrolet Astro 4.3L MIL Lamp on VIN: 1GBEL19W41
P0300: Multiple Cylinder Misfire Detected. ... cutting out intermittantly at 60+MPH after at least 15 miles of driving. They did tell me that it did this proir to the fuel pump replacemant. I took the vehicle on a drive to recreate customers complaint. The vehicle cut out like a cough one time and set ...
April 18, 2011
1996 Hyundai Elantra GL 1.8L Misfire VIN: KMHJW24M8T
P0300: Multiple Misfire Detected. We pulled fuel filter and fuel was dirty appear to have rust I suspected filter was clogged and took it apart to find very little debris to my surprise.Not sure what is going on.Injectors were reman. any suggestion would be appreciated!
April 19, 2011
2001 Chevrolet Astro 4.3L MIL Lamp on VIN: 1GBEL19W41
P0300: Multiple Cylinder Misfire Detected. ... cutting out intermittantly at 60+MPH after at least 15 miles of driving. They did tell me that it did this proir to the fuel pump replacemant. I took the vehicle on a drive to recreate customers complaint. The vehicle cut out like a cough one time and set ...
April 20, 2011
2008 Dodge Charger R/T 5.7L Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 2B3KA53H88
P0300: Random misfire. Hi guys please help this car is driving us crazy.first we replace oil w/ correct oil drove for 1 day then replaced again. Since then every time i drive car it gets differant codes.all data looks good while driving car but int. Stalls at stop signs.ck all wirin...
April 20, 2011
2005 Lincoln LS Luxury 3.0L Poor Idle Quality, Hesitation, Surge, Misfire, MIL Lamp on VIN: 1LNHM87A65
P0300: Multiple misfire. ... codes on the second trip every time. Some times it sets a p0300 when it idles rough but not always. On light acceleration it has terrible spark knock, but seems to clear up and run good if you give it a decent amount of p...
April 20, 2011
2004 Chevrolet Silverado 2500 HD 6.0L Misfire VIN: 1GCHK29U24
P0300: Multiple Engine Misfire Detected. Hi guys. I have a 2004 Chevy Silverado 2500HD. Has misfires on all cylinders. Customer replaced plugs and wires with new sets, hoping to cure the problem. We have done a crank relearn, which did not help. We replaced the crankshaft sensor, still no change. We ...
April 21, 2011
2006 Chevrolet Silverado 1500 LT 5.3L Misfire, MIL Lamp on VIN: 1GCEK19B66
P0300: Multiple Cylinder Misfire Detected. This is a ? not a help request. Vehicle came in with celo and misfire codes set. Truck had oe plugs and wires, so the first thing we do is install new plugs and wires clear codes and test drive. Seemed good. Next morning cust calls light back on, he brought it...
April 21, 2011
1997 GMC Jimmy SLE 4.3L Misfire VIN: 1GKDT13W9V
P0300: Multiple Cylinder Misfire Detected. I have a 97 jimmy 4.3L. came in with o2 code and misfire codes. We did a total tuneup.Ran well it came back running bad replaced o2 fuel pressure was 76 psi running 50 off.we replaced the fuel pressure regulater and now the fuel pressure is at 80 psi.It stays ...
April 21, 2011
2006 Hyundai Sonata GLS 3.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 5NPEU46F96
P0300: Multiple Misfire Detected. This car came in running poorly. The front bank is dead, all cylinders. They all have spark and inj pulse. Replaced CAM sensor with no change. Compression is 150+. Converter is right at the manifold, testing back pressure showed fluctuating (bouncing) between ...
April 22, 2011
2006 Mercedes-Benz C230 Sport 2.5L Poor Idle Quality, Hesitation, Surge, Misfire VIN: WDBRF52H16
P0300: Random Misfire. Hey guys. I need some help with this one. This car came in with a check engine light with the codes listed. I've checked the misfire data and saw #1 and couple of other cylinders missing only @ idle. Given the failure rates of the MAFs, I started by checking t...
April 22, 2011
2006 Ford F-250 Super Duty XL 5.4L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 1FTSX21506
P0300: Random Misfire Detected. This vehicle came in running rough with these codes.Figured few coils would fix 3&4. Thought had ticking noise on #1 bank. Pulled valve cover looking for broken valve spring and all is good with good compression. Truck misses instantly on start up, pops cy...
April 25, 2011
1998 Saturn SW2 1.9L Misfire VIN: 1G8ZK8270W
P0300: Random Misfire Detected. Car came in running poorly, after retrieving codes noticed car had a random cylinder misfire, with two bad oxygen sensors. Replaced all that, took the car on a test drive to find that is had a misfire on cylinder 4 mainly still but you only notice it once you ...
April 25, 2011
2006 Cadillac CTS 2.8L Poor Idle Quality, Hesitation, Poor Fuel Economy, MIL Lamp on VIN: 1G6DM57T56
P0300: Engine Misfire Detected. Hey guys. This customer requested a used engine b/c the dealer said the chain jumped and bent all the valves. I installed the engine and it ran great. The customer put [...] on it and the CEL came on with the codes listed below. When I clear the codes the one ...
April 26, 2011
1998 Nissan Pathfinder SE 3.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: JN8AR05Y1W
P0300: Multiple Misfire Detected. Changed timing belt, waterpump, valve cover gaskets. No prior problems or codes. After repairs po300 and po302 came on. Tested injectors and found #2 injector out of specs replaced stil have misfire intermintent after warm up have tried replacing spark plug, c...
April 26, 2011
2003 Chevrolet Blazer LS 4.3L Misfire, MIL Lamp on VIN: 1GNDT13XX3
P0300: Multiple Cylinder Misfire Detected. came in missfiring with p0300 stored, customer installed new plugs in cyl's 1,2,4,6, and left the other two and wires, cap and rotor for me. cam retard was @ -8 so i took care of that, is now set to 0. ran like a champ for a week, came back with a miss and cod...
April 27, 2011
2001 GMC Sonoma SL 4.3L Misfire, MIL Lamp on, No misfire felt VIN: 1GTDT13W91
P0300: Multiple Engine Misfire Detected. Runs great at 2500 to 3000 rpm ses light flashes i dont feel a engine miss at idle light goes out and the engine idles smoothly
April 28, 2011
2001 Mazda Tribute ES 3.0L Misfire
P0300: Multiple Misfire Detected. misfire in idle, catalyst monitor and evap monitar never complete. To pass emissions all but one monitors needed to be completed. Reset the computer by grounding battery. Bank 1 runs rich and Long fuel trim stays from -2o% to -25%
April 28, 2011
2003 Honda Accord LX 2.4L Misfire, MIL Lamp on VIN: 3HGCM56303
P0300: Random Misfire Detected. Dead miss on #1. Replaced plug, no change. Coil fires to ground. Swapped #1, #2 coils, miss did not follow coil. Compression 175 on #1 and #2. Observed piston movement #1. Noid light flashes for #1. Removed fuel rail and cranked engine, all injectors spray equ...
April 29, 2011
2002 Honda Accord EX 2.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: JHMCG65822
P0300: Multiple Misfire Detected. first thanks to all for the help. i have my dads 02 honda accord 4cyl 5spd. About 3000 miles ago it started skipping so i plulled the plugs and they were worn out. OE cap and rotor and wires as well 155k 0n them. so ii replaced cap rotor wires plugs. After doi...
April 03, 2011
1997 Buick LeSabre Custom 3.8L Misfire VIN: 1G4HP52K1V
P0300: Engine Misfire Detected. we have a 97 buick le sab, that is runing poor,is mising under load, we check the cat and looks like is ok,the only code tha i get is po300, plug, wires are good, fuelpump is new, fuel filter,new coils, new modul,i just dont know what is nex, on my scan tool t...
April 05, 2011
2006 Ford Explorer XLT 4.0L MIL Lamp on VIN: 1FMEU63E36
P0300: Multiple/Random Misfire Detected. This vehicle keeps returning with the above codes. Customer states that vehicle has always ran great and the light just comes on and stays on (does not flash). I have road tested the vehicle numerous times each time it has been in here and it has always ran gr...
April 05, 2011
1998 Oldsmobile Intrigue 3.8L Excessive Emissions, No Start, Misfire, MIL Lamp on, Floods VIN: 1G3WH52KOW
P0300: Engine Misfire Detected. First of all thanks for taking the time to read this. I have a strang one here. Car came in on the hook, owner stated car started running rough, and stalled. She attempted to restart it and said that a lot of white smoke came out of the exhaust. I checked for ...
April 05, 2011
2006 Ford Explorer XLT 4.0L MIL Lamp on VIN: 1FMEU63E36
P0300: Multiple/Random Misfire Detected. This vehicle keeps returning with the above codes. Customer states that vehicle has always ran great and the light just comes on and stays on (does not flash). I have road tested the vehicle numerous times each time it has been in here and it has always ran gr...
April 06, 2011
1998 Oldsmobile Intrigue 3.8L Excessive Emissions, No Start, Misfire, MIL Lamp on, Floods VIN: 1G3WH52KOW
P0300: Engine Misfire Detected. First of all thanks for taking the time to read this. I have a strang one here. Car came in on the hook, owner stated car started running rough, and stalled. She attempted to restart it and said that a lot of white smoke came out of the exhaust. I checked for ...
April 06, 2011
1998 GMC Savana 3500 5.7L Misfire VIN: 1GDHG31R9W
P0300: Multiple Cylinder Misfire Detected. Hi guys, just replaced both heads, new heads. Have misfire constantly cyl. 3,6 and sometimes on 2, set cam retard to 0" no help, checked dist. lined up on no 1 at tdc plugs and wires okay. Wondering if overtightened valves, tightened till no play then 360 ...
April 07, 2011
2003 Volkswagen Passat GLS 1.8L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: WVWPD63B63
P0300: random misfire. Car came in misfiring and barely running at idle. Car runs just great soon as you drive it or even if u bring revs off idle. Replaced plugs and then checked later and were fouled after not much running time at idle. LTFT 10% STFT 25% after a short 10 min drive...
April 07, 2011
2003 Audi A6 Quattro 2.7L Misfire VIN: WAULD64B73
P0300: Random misfire. Clutch and valve cover gaskets were replaced and vehicle was test driven and ran fantastic! The next day the customer came to pick up the car and it had a dead miss from start in cyl #6. Swapped coils and changed plugs but misfire still remains. Tested for pow...
April 08, 2011
2003 Chevrolet Tahoe Z71 5.3L Poor Idle Quality, MIL Lamp on VIN: 1GNEK13Z83
P0300: Multiple Cylinder Misfire Detected. We have this vehicle in that a dealership diagnosed a faulty cat on this vehicle. We replaced the cat with oe, cleared codes and then it was running poorly. My tech replaced the b2s1 with an oe part. We are having a problem with b2 running lean. ltft is at 25,...
April 12, 2011
2002 Chevrolet Blazer Xtreme 4.3L Misfire VIN: 1GNCS18WX2
P0300: Multiple Cylinder Misfire Detected. ... ses light on. Code p0300 found but only #6 had any miss counter. Replaced dist cap, rotor, wires and plugs. All were original. By then the thing had cooled down and it ran great long enough to get half way around the block. Then the ses light came back on ...
April 13, 2011
2001 Chevrolet Astro 4.3L MIL Lamp on VIN: 1GBEL19W41
P0300: Multiple Cylinder Misfire Detected. ... cutting out intermittantly at 60+MPH after at least 15 miles of driving. They did tell me that it did this proir to the fuel pump replacemant. I took the vehicle on a drive to recreate customers complaint. The vehicle cut out like a cough one time and set ...
April 18, 2011
1996 Hyundai Elantra GL 1.8L Misfire VIN: KMHJW24M8T
P0300: Multiple Misfire Detected. We pulled fuel filter and fuel was dirty appear to have rust I suspected filter was clogged and took it apart to find very little debris to my surprise.Not sure what is going on.Injectors were reman. any suggestion would be appreciated!
April 19, 2011
2001 Chevrolet Astro 4.3L MIL Lamp on VIN: 1GBEL19W41
P0300: Multiple Cylinder Misfire Detected. ... cutting out intermittantly at 60+MPH after at least 15 miles of driving. They did tell me that it did this proir to the fuel pump replacemant. I took the vehicle on a drive to recreate customers complaint. The vehicle cut out like a cough one time and set ...
April 20, 2011
2008 Dodge Charger R/T 5.7L Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 2B3KA53H88
P0300: Random misfire. Hi guys please help this car is driving us crazy.first we replace oil w/ correct oil drove for 1 day then replaced again. Since then every time i drive car it gets differant codes.all data looks good while driving car but int. Stalls at stop signs.ck all wirin...
April 20, 2011
2005 Lincoln LS Luxury 3.0L Poor Idle Quality, Hesitation, Surge, Misfire, MIL Lamp on VIN: 1LNHM87A65
P0300: Multiple misfire. ... codes on the second trip every time. Some times it sets a p0300 when it idles rough but not always. On light acceleration it has terrible spark knock, but seems to clear up and run good if you give it a decent amount of p...
April 20, 2011
2004 Chevrolet Silverado 2500 HD 6.0L Misfire VIN: 1GCHK29U24
P0300: Multiple Engine Misfire Detected. Hi guys. I have a 2004 Chevy Silverado 2500HD. Has misfires on all cylinders. Customer replaced plugs and wires with new sets, hoping to cure the problem. We have done a crank relearn, which did not help. We replaced the crankshaft sensor, still no change. We ...
April 21, 2011
2006 Chevrolet Silverado 1500 LT 5.3L Misfire, MIL Lamp on VIN: 1GCEK19B66
P0300: Multiple Cylinder Misfire Detected. This is a ? not a help request. Vehicle came in with celo and misfire codes set. Truck had oe plugs and wires, so the first thing we do is install new plugs and wires clear codes and test drive. Seemed good. Next morning cust calls light back on, he brought it...
April 21, 2011
1997 GMC Jimmy SLE 4.3L Misfire VIN: 1GKDT13W9V
P0300: Multiple Cylinder Misfire Detected. I have a 97 jimmy 4.3L. came in with o2 code and misfire codes. We did a total tuneup.Ran well it came back running bad replaced o2 fuel pressure was 76 psi running 50 off.we replaced the fuel pressure regulater and now the fuel pressure is at 80 psi.It stays ...
April 21, 2011
2006 Hyundai Sonata GLS 3.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 5NPEU46F96
P0300: Multiple Misfire Detected. This car came in running poorly. The front bank is dead, all cylinders. They all have spark and inj pulse. Replaced CAM sensor with no change. Compression is 150+. Converter is right at the manifold, testing back pressure showed fluctuating (bouncing) between ...
April 22, 2011
2006 Mercedes-Benz C230 Sport 2.5L Poor Idle Quality, Hesitation, Surge, Misfire VIN: WDBRF52H16
P0300: Random Misfire. Hey guys. I need some help with this one. This car came in with a check engine light with the codes listed. I've checked the misfire data and saw #1 and couple of other cylinders missing only @ idle. Given the failure rates of the MAFs, I started by checking t...
April 22, 2011
2006 Ford F-250 Super Duty XL 5.4L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 1FTSX21506
P0300: Random Misfire Detected. This vehicle came in running rough with these codes.Figured few coils would fix 3&4. Thought had ticking noise on #1 bank. Pulled valve cover looking for broken valve spring and all is good with good compression. Truck misses instantly on start up, pops cy...
April 25, 2011
1998 Saturn SW2 1.9L Misfire VIN: 1G8ZK8270W
P0300: Random Misfire Detected. Car came in running poorly, after retrieving codes noticed car had a random cylinder misfire, with two bad oxygen sensors. Replaced all that, took the car on a test drive to find that is had a misfire on cylinder 4 mainly still but you only notice it once you ...
April 25, 2011
2006 Cadillac CTS 2.8L Poor Idle Quality, Hesitation, Poor Fuel Economy, MIL Lamp on VIN: 1G6DM57T56
P0300: Engine Misfire Detected. Hey guys. This customer requested a used engine b/c the dealer said the chain jumped and bent all the valves. I installed the engine and it ran great. The customer put [...] on it and the CEL came on with the codes listed below. When I clear the codes the one ...
April 26, 2011
1998 Nissan Pathfinder SE 3.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: JN8AR05Y1W
P0300: Multiple Misfire Detected. Changed timing belt, waterpump, valve cover gaskets. No prior problems or codes. After repairs po300 and po302 came on. Tested injectors and found #2 injector out of specs replaced stil have misfire intermintent after warm up have tried replacing spark plug, c...
April 26, 2011
2003 Chevrolet Blazer LS 4.3L Misfire, MIL Lamp on VIN: 1GNDT13XX3
P0300: Multiple Cylinder Misfire Detected. came in missfiring with p0300 stored, customer installed new plugs in cyl's 1,2,4,6, and left the other two and wires, cap and rotor for me. cam retard was @ -8 so i took care of that, is now set to 0. ran like a champ for a week, came back with a miss and cod...
April 27, 2011
2001 GMC Sonoma SL 4.3L Misfire, MIL Lamp on, No misfire felt VIN: 1GTDT13W91
P0300: Multiple Engine Misfire Detected. Runs great at 2500 to 3000 rpm ses light flashes i dont feel a engine miss at idle light goes out and the engine idles smoothly
April 28, 2011
2001 Mazda Tribute ES 3.0L Misfire
P0300: Multiple Misfire Detected. misfire in idle, catalyst monitor and evap monitar never complete. To pass emissions all but one monitors needed to be completed. Reset the computer by grounding battery. Bank 1 runs rich and Long fuel trim stays from -2o% to -25%
April 28, 2011
2003 Honda Accord LX 2.4L Misfire, MIL Lamp on VIN: 3HGCM56303
P0300: Random Misfire Detected. Dead miss on #1. Replaced plug, no change. Coil fires to ground. Swapped #1, #2 coils, miss did not follow coil. Compression 175 on #1 and #2. Observed piston movement #1. Noid light flashes for #1. Removed fuel rail and cranked engine, all injectors spray equ...
April 29, 2011