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P0300 Diagnostic Trouble Code Discussion for August 2006

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
2002 Jeep Liberty Limited 3.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1J8GL58K32
P0300: Multiple Misfire Detected. ... misfire and P0303 cylinder 3 misfire. Vehicle runs rough at idle but runs great off idle and at cruise and under load. Vehicle also exhibits a long crank time at most times but always starts. Spark plugs are all recently new...
August 03, 2006
1999 Pontiac Grand Am GT 3.4L Surge, Cuts out VIN: 1G2NW52EXX
P0300: Multiple Cylinder Misfire Detected. car mainly cold on accel, hesitates, surges, pops and backfires. does get better as engine warms up, but still there. fuel pressure is koeo at 45, and flow is good. did a snapshot with tech 2 and only thing we saw was at 24x would match engine rpm only to abou...
August 04, 2006
1999 Chevrolet Silverado 1500 5.3L Misfire, MIL Lamp on VIN: 1GCEK14T4X
P0300: Multiple Cylinder Misfire Detected. ok all you gm techs this ol ford guy needs some help. truck has misfire under a load or going down the road,but hardly ever at idle,and the weird thing is its only on the right side 2,4,6,8.all have recent misfire history.it does not miss on 1,3,5,7.im thinkin...
August 07, 2006
1999 Chevrolet K1500 Suburban 5.7L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Misfire, MIL Lamp on VIN: 3GNFK16R8X
P0300: Multiple Cylinder Misfire Detected. ... non start by bad fuel pump and by mil on P0300, engine was able to start sometimes, and found misfiring cyl 4 ,plug was fouled by oil by worn valve guides. After install new fuel pump,fuel filter, spark plugs and new head gaskets (valve guides job done) en...
August 08, 2006
1999 Acura TL 3.2L Misfire, MIL Lamp on VIN: 19UUA5648X
P0300: Multiple Misfire Detected. Hello, Car came in with ck engine light on as well as TCS light, car runs poorly with obvious misfire occuring at all times. Besides above mentioned codes, the remaining cylinder misfire codes are set, and reset in a short test drive (less than 5 miles) as w...
August 09, 2006
1998 Chrysler Town & Country (Van) LX 3.3L Hesitation, Misfire, MIL Lamp on VIN: IP4GP44ROW
P0300: mutiple misfire. intermediate problem , happens when put into reverse gear real noticable mil light comes on stumble happens and sets codes. this problem also happens in drive but not as noticeable. it might be fine for a while and shows up the next day. fuel pressure stays at...
August 09, 2006
2002 Mercedes-Benz CLK55 AMG 5.5L Misfire, MIL Lamp on VIN: WDBLK74GX2
P0300: random multiple misfire. please help.misfire on all cyl. on driver side. o2 sens. on bank 1 have high volts.bank 2 are low.m.a.f sensor readings are within specs. injectors are working.can clear codes,test drive,first cly #8 misfire then #5,#6,and #7will hit.
August 09, 2006
1999 Lexus RX300 3.0L Excessive Emissions, Misfire, Poor Fuel Economy, lacks power VIN: JT6HF10U3X
P0300: random misfire. This vehicle has negative fuel trims on bank 2 and positive trims on bank 1. I tried swapped af sensors from side to side and trims remained the same. I have replaced MAF and 1 igntion coil. This suv has no power sounds like pinging under load. I have checked ...
August 10, 2006
1998 Nissan Maxima SE 3.0L Misfire VIN: JN1CA2106W
P0300: Multiple Misfire Detected. Number 2 injector drops out under a load. Neither cam or crank sensors drop out or spike during the misfire. all injectors ohm out good. Injector ground to PCM voltage drops good. Any suggestions out there?...
August 11, 2006
1996 Cadillac DeVille 4.6L Misfire, MIL Lamp on VIN: 1G6KD52Y2T
P0300: Engine Misfire Detected. ... history on this reman engine first. We replaced the engine due to a chronic overheating problem with is consistent with the 4.6 Northstar. We didn't want to get involved in head gaskets so we told the customer the only way we would fix it would be to repla...
August 15, 2006
2001 Mazda Protege ES 2.0L Poor Idle Quality, Stall VIN: JM1BJ22531
P0300: Multiple Misfire Detected. car came to shop with erratic idle problem, also when in gear with foot on brake engine will stall. found engine codes listed above. performed system tests on related cicuits as per mitchell 1. no opens or shorts found in maf, iat, or egr electrical circuits f...
August 15, 2006
2001 BMW 330Ci 3.0L Misfire, MIL Lamp on VIN: WBABN53451
P0300: random mis-fire. ... is busting our brain. We have done and engine swap after the customer went through a to deep puddle and ruined the engine. The engine swap went ok, and when we 1st started the car it ran on all 6 cylinders. Then it started to run poorly. We found the numbe...
August 18, 2006
2002 Chevrolet Silverado 1500 5.3L Poor Idle Quality, Hesitation, Stall, Misfire, MIL Lamp on VIN: 2GCEC19T42
P0300: Multiple Cylinder Misfire Detected. vehicle is miss firing on 1,3,5,7 can remove injA fuse and engine changes a bit but not much,have checked spark and it is good,ran inj bal test and all are even psi's,on the inj kill test 2,4,6,8 all effect the engine but when 1,3,5,7 are killed it didn't make...
August 18, 2006
1998 Ford E-350 Econoline XL 6.8L Cuts out, Misfire, MIL Lamp on VIN: 1FDWE30S2W
P0300: Random Misfire Detected. engine definitely misses on more than one cylinder, will not set individual cylinder missfire codes, however in mode 06 scanner always shows failed missfire test on cylinders 5,6,7,8. replaced plugs , no change,switched coils problem did not follow coils, swit...
August 18, 2006
1998 Nissan Maxima SE 3.0L Misfire VIN: JN1CA2106W
P0300: Multiple Misfire Detected. Number 2 injector drops out under a load. Neither cam or crank sensors drop out or spike during the misfire. all injectors ohm out good. Injector ground to PCM voltage drops good. Any suggestions out there?...
August 18, 2006
1997 Chevrolet S10 LS 2.2L Misfire, MIL Lamp on VIN: 1GCCS1942V
P0300: Multiple Engine Misfire Detected. This is for a friend @ another shop I believe we have a computor or crank reluctor problem butttttttt.Here we go first after he brought the truck up today to see what my scan tool showed on the missfires it does the same which is if if you disconnect injector ...
August 21, 2006
1997 Chevrolet S10 LS 2.2L Misfire, MIL Lamp on VIN: 1GCCS1942V
P0300: Multiple Engine Misfire Detected. This is for a friend @ another shop I believe we have a computor or crank reluctor problem butttttttt.Here we go first after he brought the truck up today to see what my scan tool showed on the missfires it does the same which is if if you disconnect injector ...
August 22, 2006
1996 Dodge Caravan SE 3.3L MIL Lamp on VIN: 1B4GP45R4T
P0300: Multiple Cylinder Misfire Detected. ... been needy lately but I have already wasted enough time running in circles. This caravan came in originally for a random dying problem. There were no codes and it never died for me. I did some research and inspected the vehicle and determined the next step...
August 22, 2006
1997 Pontiac Trans Sport 3.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GMDU06E8V
P0300: Multiple Cylinder Misfire Detected. this van will show missfire cnts for all cylinders intermitantly.ranging 2-6 cnts. It does it idling in park or neutral.If you drop it in gear or turn a/c on it quits showing miss firing and the motor is smooth.Doesn't do anything driving. they have put plugs ...
August 22, 2006
1996 Cadillac DeVille 4.6L Misfire, MIL Lamp on VIN: 1G6KD52Y2T
P0300: Engine Misfire Detected. ... history on this reman engine first. We replaced the engine due to a chronic overheating problem with is consistent with the 4.6 Northstar. We didn't want to get involved in head gaskets so we told the customer the only way we would fix it would be to repla...
August 23, 2006
2000 Oldsmobile Silhouette GLS 3.4L Misfire VIN: 1GHDX03EXY
P0300: Multiple Cylinder Misfire Detected. Van came in with antifreeze in oil, we origninally replaced intake gaskets. After approximatly a month it came back & it was overheating, so we had to replace cylinder head gaskets. Since than it has been back with po300 random cylinder missfire. We replac...
August 23, 2006
1998 Volkswagen Beetle 2.0L Hesitation VIN: 3VWBB61C2W
P0300: random misfire all cylinders. when the engine first starts-up cold, the car will idle well. as soon as you press the gas pedal the car chokes, coughs, sputters,but will not go fast enough to even change into second gear. even when you press the gas pedal to the floor. let go the gas pedal ...
August 23, 2006
1998 Mazda Millenia 2.5L Hesitation, Misfire, MIL Lamp on VIN: JMITA2219W
P0300: Multiple Misfire Detected. ... and poor performance. After initial repair was good for about 2 weeks. Came back with engine light on with codes p0300 and p0325. p0325 is intermittent and does not show up when problem occurs. This happens when hot. Vehi...
August 24, 2006
2000 Nissan Maxima SE 3.0L Poor Idle Quality, Misfire, MIL Lamp on
P0300: Multiple Misfire Detected. Man, can I use some help on this one. I'll start off with a little background. This is a highly customized 00 Maxima that came in to be check for a misfire. When I say customized I'm mostly referring to cosmetics, dvd, etc. The only performance upgrade I can s...
August 26, 2006
1996 Chevrolet Lumina 3.1L Poor Idle Quality, MIL Lamp on VIN: 2G1WL52M4T
P0300: Multiple Engine Misfire Detected. Hi everyone thanks for your help, this car has a po300 random misfire code but isn't missing runs really rough until you unplug the maf then it smooths out with maf hooked up map voltage is 2.5-volts when un hooked it's 1.44 volts and up vacume too map is 19 i...
August 29, 2006
1999 Chevrolet Express 2500 5.0L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1GCFG25M3X
P0300: Multiple Cylinder Misfire Detected. This van has a very cool problem. On hard accel, it will accelerate to almost the 2-3 shift point, and then just surge while slowly losing speed. Feels just like a lack of fuel, but pressure holds steady at 61 psi throughout the condition. It also begins to sp...
August 29, 2006
2001 Chevrolet Monte Carlo SS 3.8L Hesitation, Surge, Cuts out, Misfire VIN: 2G1WX15K51
P0300: Multiple Cylinder Misfire Detected. plugs wires,plugs all filters. map sensor fine, maf fine,could i lack flow in fuel but have pressure? i can't get any other codes i drove it with fuel pressure gauge on my lap and as soon as your driving and step on it pressure stay right at 55-56 never drops ...
August 30, 2006
1995 Mazda Millenia S 2.3L Hesitation, Stall, MIL Lamp on
P0300: random cylinder misfire. We had removed the supercharger and inspected it. Replaced the front anf=d rear valve cover gaskets and plug boots. Also had replaced the rear catatlytic converter and rear oxygen sensors. The rear cat had a hole burned in it which was the original complaint. ...
August 31, 2006
2002 Jeep Liberty Limited 3.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1J8GL58K32
P0300: Multiple Misfire Detected. ... misfire and P0303 cylinder 3 misfire. Vehicle runs rough at idle but runs great off idle and at cruise and under load. Vehicle also exhibits a long crank time at most times but always starts. Spark plugs are all recently new...
August 03, 2006
1999 Pontiac Grand Am GT 3.4L Surge, Cuts out VIN: 1G2NW52EXX
P0300: Multiple Cylinder Misfire Detected. car mainly cold on accel, hesitates, surges, pops and backfires. does get better as engine warms up, but still there. fuel pressure is koeo at 45, and flow is good. did a snapshot with tech 2 and only thing we saw was at 24x would match engine rpm only to abou...
August 04, 2006
1999 Chevrolet Silverado 1500 5.3L Misfire, MIL Lamp on VIN: 1GCEK14T4X
P0300: Multiple Cylinder Misfire Detected. ok all you gm techs this ol ford guy needs some help. truck has misfire under a load or going down the road,but hardly ever at idle,and the weird thing is its only on the right side 2,4,6,8.all have recent misfire history.it does not miss on 1,3,5,7.im thinkin...
August 07, 2006
1999 Chevrolet K1500 Suburban 5.7L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Misfire, MIL Lamp on VIN: 3GNFK16R8X
P0300: Multiple Cylinder Misfire Detected. ... non start by bad fuel pump and by mil on P0300, engine was able to start sometimes, and found misfiring cyl 4 ,plug was fouled by oil by worn valve guides. After install new fuel pump,fuel filter, spark plugs and new head gaskets (valve guides job done) en...
August 08, 2006
1999 Acura TL 3.2L Misfire, MIL Lamp on VIN: 19UUA5648X
P0300: Multiple Misfire Detected. Hello, Car came in with ck engine light on as well as TCS light, car runs poorly with obvious misfire occuring at all times. Besides above mentioned codes, the remaining cylinder misfire codes are set, and reset in a short test drive (less than 5 miles) as w...
August 09, 2006
1998 Chrysler Town & Country (Van) LX 3.3L Hesitation, Misfire, MIL Lamp on VIN: IP4GP44ROW
P0300: mutiple misfire. intermediate problem , happens when put into reverse gear real noticable mil light comes on stumble happens and sets codes. this problem also happens in drive but not as noticeable. it might be fine for a while and shows up the next day. fuel pressure stays at...
August 09, 2006
2002 Mercedes-Benz CLK55 AMG 5.5L Misfire, MIL Lamp on VIN: WDBLK74GX2
P0300: random multiple misfire. please help.misfire on all cyl. on driver side. o2 sens. on bank 1 have high volts.bank 2 are low.m.a.f sensor readings are within specs. injectors are working.can clear codes,test drive,first cly #8 misfire then #5,#6,and #7will hit.
August 09, 2006
1999 Lexus RX300 3.0L Excessive Emissions, Misfire, Poor Fuel Economy, lacks power VIN: JT6HF10U3X
P0300: random misfire. This vehicle has negative fuel trims on bank 2 and positive trims on bank 1. I tried swapped af sensors from side to side and trims remained the same. I have replaced MAF and 1 igntion coil. This suv has no power sounds like pinging under load. I have checked ...
August 10, 2006
1998 Nissan Maxima SE 3.0L Misfire VIN: JN1CA2106W
P0300: Multiple Misfire Detected. Number 2 injector drops out under a load. Neither cam or crank sensors drop out or spike during the misfire. all injectors ohm out good. Injector ground to PCM voltage drops good. Any suggestions out there?...
August 11, 2006
1996 Cadillac DeVille 4.6L Misfire, MIL Lamp on VIN: 1G6KD52Y2T
P0300: Engine Misfire Detected. ... history on this reman engine first. We replaced the engine due to a chronic overheating problem with is consistent with the 4.6 Northstar. We didnít want to get involved in head gaskets so we told the customer the only way we would fix it would be to repla...
August 15, 2006
2001 Mazda Protege ES 2.0L Poor Idle Quality, Stall VIN: JM1BJ22531
P0300: Multiple Misfire Detected. car came to shop with erratic idle problem, also when in gear with foot on brake engine will stall. found engine codes listed above. performed system tests on related cicuits as per mitchell 1. no opens or shorts found in maf, iat, or egr electrical circuits f...
August 15, 2006
2001 BMW 330Ci 3.0L Misfire, MIL Lamp on VIN: WBABN53451
P0300: random mis-fire. ... is busting our brain. We have done and engine swap after the customer went through a to deep puddle and ruined the engine. The engine swap went ok, and when we 1st started the car it ran on all 6 cylinders. Then it started to run poorly. We found the numbe...
August 18, 2006
2002 Chevrolet Silverado 1500 5.3L Poor Idle Quality, Hesitation, Stall, Misfire, MIL Lamp on VIN: 2GCEC19T42
P0300: Multiple Cylinder Misfire Detected. vehicle is miss firing on 1,3,5,7 can remove injA fuse and engine changes a bit but not much,have checked spark and it is good,ran inj bal test and all are even psi's,on the inj kill test 2,4,6,8 all effect the engine but when 1,3,5,7 are killed it didn't make...
August 18, 2006
1998 Ford E-350 Econoline XL 6.8L Cuts out, Misfire, MIL Lamp on VIN: 1FDWE30S2W
P0300: Random Misfire Detected. engine definitely misses on more than one cylinder, will not set individual cylinder missfire codes, however in mode 06 scanner always shows failed missfire test on cylinders 5,6,7,8. replaced plugs , no change,switched coils problem did not follow coils, swit...
August 18, 2006
1998 Nissan Maxima SE 3.0L Misfire VIN: JN1CA2106W
P0300: Multiple Misfire Detected. Number 2 injector drops out under a load. Neither cam or crank sensors drop out or spike during the misfire. all injectors ohm out good. Injector ground to PCM voltage drops good. Any suggestions out there?...
August 18, 2006
1997 Chevrolet S10 LS 2.2L Misfire, MIL Lamp on VIN: 1GCCS1942V
P0300: Multiple Engine Misfire Detected. This is for a friend @ another shop I believe we have a computor or crank reluctor problem butttttttt.Here we go first after he brought the truck up today to see what my scan tool showed on the missfires it does the same which is if if you disconnect injector ...
August 21, 2006
1997 Chevrolet S10 LS 2.2L Misfire, MIL Lamp on VIN: 1GCCS1942V
P0300: Multiple Engine Misfire Detected. This is for a friend @ another shop I believe we have a computor or crank reluctor problem butttttttt.Here we go first after he brought the truck up today to see what my scan tool showed on the missfires it does the same which is if if you disconnect injector ...
August 22, 2006
1996 Dodge Caravan SE 3.3L MIL Lamp on VIN: 1B4GP45R4T
P0300: Multiple Cylinder Misfire Detected. ... been needy lately but I have already wasted enough time running in circles. This caravan came in originally for a random dying problem. There were no codes and it never died for me. I did some research and inspected the vehicle and determined the next step...
August 22, 2006
1997 Pontiac Trans Sport 3.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GMDU06E8V
P0300: Multiple Cylinder Misfire Detected. this van will show missfire cnts for all cylinders intermitantly.ranging 2-6 cnts. It does it idling in park or neutral.If you drop it in gear or turn a/c on it quits showing miss firing and the motor is smooth.Doesn't do anything driving. they have put plugs ...
August 22, 2006
1996 Cadillac DeVille 4.6L Misfire, MIL Lamp on VIN: 1G6KD52Y2T
P0300: Engine Misfire Detected. ... history on this reman engine first. We replaced the engine due to a chronic overheating problem with is consistent with the 4.6 Northstar. We didnít want to get involved in head gaskets so we told the customer the only way we would fix it would be to repla...
August 23, 2006
2000 Oldsmobile Silhouette GLS 3.4L Misfire VIN: 1GHDX03EXY
P0300: Multiple Cylinder Misfire Detected. Van came in with antifreeze in oil, we origninally replaced intake gaskets. After approximatly a month it came back & it was overheating, so we had to replace cylinder head gaskets. Since than it has been back with po300 random cylinder missfire. We replac...
August 23, 2006
1998 Volkswagen Beetle 2.0L Hesitation VIN: 3VWBB61C2W
P0300: random misfire all cylinders. when the engine first starts-up cold, the car will idle well. as soon as you press the gas pedal the car chokes, coughs, sputters,but will not go fast enough to even change into second gear. even when you press the gas pedal to the floor. let go the gas pedal ...
August 23, 2006
1998 Mazda Millenia 2.5L Hesitation, Misfire, MIL Lamp on VIN: JMITA2219W
P0300: Multiple Misfire Detected. ... and poor performance. After initial repair was good for about 2 weeks. Came back with engine light on with codes p0300 and p0325. p0325 is intermittent and does not show up when problem occurs. This happens when hot. Vehi...
August 24, 2006
2000 Nissan Maxima SE 3.0L Poor Idle Quality, Misfire, MIL Lamp on
P0300: Multiple Misfire Detected. Man, can I use some help on this one. I'll start off with a little background. This is a highly customized 00 Maxima that came in to be check for a misfire. When I say customized I'm mostly referring to cosmetics, dvd, etc. The only performance upgrade I can s...
August 26, 2006
1996 Chevrolet Lumina 3.1L Poor Idle Quality, MIL Lamp on VIN: 2G1WL52M4T
P0300: Multiple Engine Misfire Detected. Hi everyone thanks for your help, this car has a po300 random misfire code but isn't missing runs really rough until you unplug the maf then it smooths out with maf hooked up map voltage is 2.5-volts when un hooked it's 1.44 volts and up vacume too map is 19 i...
August 29, 2006
1999 Chevrolet Express 2500 5.0L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1GCFG25M3X
P0300: Multiple Cylinder Misfire Detected. This van has a very cool problem. On hard accel, it will accelerate to almost the 2-3 shift point, and then just surge while slowly losing speed. Feels just like a lack of fuel, but pressure holds steady at 61 psi throughout the condition. It also begins to sp...
August 29, 2006
2001 Chevrolet Monte Carlo SS 3.8L Hesitation, Surge, Cuts out, Misfire VIN: 2G1WX15K51
P0300: Multiple Cylinder Misfire Detected. plugs wires,plugs all filters. map sensor fine, maf fine,could i lack flow in fuel but have pressure? i can't get any other codes i drove it with fuel pressure gauge on my lap and as soon as your driving and step on it pressure stay right at 55-56 never drops ...
August 30, 2006
1995 Mazda Millenia S 2.3L Hesitation, Stall, MIL Lamp on
P0300: random cylinder misfire. We had removed the supercharger and inspected it. Replaced the front anf=d rear valve cover gaskets and plug boots. Also had replaced the rear catatlytic converter and rear oxygen sensors. The rear cat had a hole burned in it which was the original complaint. ...
August 31, 2006