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P0300 Diagnostic Trouble Code Discussion for June 2008

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
2005 Jeep Grand Cherokee Laredo 3.7L Misfire VIN: 1J4GR48K95
P0300: Multiple Cylinder Misfire Detected. hi everbody. it seems #3 cylinder has the misfire. i swapped coils from #1 & #3 and also the injectors. no change with either. compression is 150. i know ther is a service bulletin or something about changing the intake valves. i think i know the fix but i...
June 02, 2008
2001 Lexus IS300 3.0L Hesitation, MIL Lamp on VIN: JTHBDN1826
P0300: Multiple Cylinder Misfire Detected. Hey guys, have here this IS300 with a hesitation on accel. It gets p to 3500 rpms and just wont go! At frist thought it was a easy fix seen codes p0171 & p0174 lean banks, so I got a denso mass air meter, and same problem the car will not accel, but now i ...
June 04, 2008
2005 Chevrolet Express 3500 6.0L Poor Idle Quality, Hesitation, Surge, Misfire, MIL Lamp on VIN: 1GCHG35U55
P0300: Multiple Cylinder Misfire Detected. ... trips to the dealer and a private goodyear repair center. It is from a fleet that i serviced for many years only to loose the account several years ago. They bought this back to me as a last resort and I am hoping that I can resolve it to get the account b...
June 05, 2008
2001 Volkswagen Beetle GLX 1.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: 3VWDD21C81
Hi guys this is my first post on iatn and it's driving me crazy, i got it from another shop, they replace coils, spark plugs, mass air flow. The problem is after sitting over night or for long period of time firts 10 sec it will misfire i conect my launch and ...
June 06, 2008
1997 Toyota 4Runner 2.7L Misfire VIN: JT3GM84R1V
P0300: Multiple Cylinder Misfire Detected. Vehicle was purchased used with aprox. 100k miles. developed a missfire on #3 cyl. Replace plugs & wires (original). Vehicle runs perfect for aprox 7k - 10k miles then starts missing on #3 cyl. Replace plug and runs perfect for another 7k-10k miles. Each t...
June 09, 2008
2002 GMC Yukon XL 1500 SLE 5.3L Misfire, MIL Lamp on VIN: 3GKFK16Z12
P0300: Multiple Cylinder Misfire Detected. Thanks in advance for all your help! I have this truck that will only misfire for about five seconds on a hot soak condition, 1 out of five times. When the problem occurs all even bank cyls. experience misfires. When this is happening cyl. #6 counts three time...
June 10, 2008
2002 Chrysler Sebring LXi 3.0L Hesitation, Cuts out, Misfire, MIL Lamp on VIN: 4C3AG52H02
P0300: Multiple Cylinder Misfire Detected. Thanks for your time,third shop to get this car,and its still not fixed.Problem is engine misfires under a load,it idles good and has plenty of power at higher rpms()2500).If you ease into the throttle it will pick-up and run fine,but with a quick snap it bogs...
June 11, 2008
2001 Cadillac DeVille 4.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G5KD54Y11
P0300: Engine Misfire Detected. Hello Everyone, I have this cadillac deville with a 4.6 and it came in with a check engine light on. I did some testing and came to determine the crank sensors were faulty. replaced them and still have the same problem. About a week a go i replaced the spark ...
June 12, 2008
2002 Volkswagen Jetta GLS 1.8L Stall VIN: WVWSE61J42
P0300: random misfire. hello techs, this VW has us scratching our heads a little. customer stated that the car stalls when ambient temp is high, after stalling the EPC light is illuminated. we scanned for codes and found those 5. the j271 relay described in the code supplies power t...
June 13, 2008
1996 Chevrolet S10 LS 2.2L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 1GCCS1943T
P0300: Multiple Engine Misfire Detected. Customer dropped truck off overnight with the complaint of poor running. The truck runs poor at idle and cruise. We have recently replaced the fuel pump and filter for a no start condition and performed a tune (plugs & wires) on the truck per maintenance. ...
June 14, 2008
2000 Jeep Cherokee Sport 4.0L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1J4FF48S9Y
P0300: Multiple Cylinder Misfire Detected. Car came in for gas smell. We found #1 injector leaking fuel into cylinder. Replaced injector and plugs. Cleared codes and sent it on its way. 3 weeks later came back in with identical trouble codes. Leaning toward cam sensor but it looked fine on the scope an...
June 16, 2008
1999 Cadillac Seville SLS 4.6L Poor Idle Quality, Hesitation, Cuts out, Misfire VIN: 1CWZ2349ZY
P0300: Engine Misfire Detected. hey everyone i have a 99 seville sts came in with a po300 randome misfire and a po741 tcc stuck off this car backfires through the intake and runs terrible dont do much on transmissions but can this misfire code and the way it runs set the trans code if drove ...
June 18, 2008
1998 Isuzu Rodeo S 2.2L Poor Idle Quality, Cuts out, Misfire, MIL Lamp on VIN: 4S2CK58D3W
P0300: Multiple Cylinder Misfire Detected. ... insight into this vehicles problem. Vehicle came into shop with a steady check engine light on and a history code for #4 cylinder misfire, po304, but at the time was not misfireing. Tech started diagnosis and found oil in all spark plug journals from leaki...
June 18, 2008
2002 Jaguar X-Type 3.0L Misfire, MIL Lamp on VIN: CAJEA51C22
P0300: random misfire. after install of new engine have a constant engine light have checked cylinder compression all at 150 psi, spark plugs are new irridiums, snapon fuelkare, checked injector spay by cranking over all have a nice even spray, checked for vacum leaks at intake, inj...
June 18, 2008
2002 Jaguar X-Type 3.0L Misfire, MIL Lamp on VIN: CAJEA51C22
P0300: random misfire. after install of new engine have a constant engine light have checked cylinder compression all at 150 psi, spark plugs are new irridiums, snapon fuelkare, checked injector spay by cranking over all have a nice even spray, checked for vacum leaks at intake, inj...
June 19, 2008
2001 Oldsmobile Aurora 3.5L Misfire, MIL Lamp on VIN: 1G3GR62H81
P0300: Multiple Cylinder Misfire Detected. So this is the worst kind of problem you can have...one on your own car... I'm in the process of buying this Aurora from my mother in law, after telling my wife for the last year that we didn't want to touch it cause these things are problem pits! It set the m...
June 19, 2008
1998 Isuzu Rodeo S 2.2L Poor Idle Quality, Cuts out, Misfire, MIL Lamp on VIN: 4S2CK58D3W
P0300: Multiple Cylinder Misfire Detected. ... insight into this vehicles problem. Vehicle came into shop with a steady check engine light on and a history code for #4 cylinder misfire, po304, but at the time was not misfireing. Tech started diagnosis and found oil in all spark plug journals from leaki...
June 20, 2008
1999 Saab 9-5 SE 2.3L Cuts out VIN: YS3EF48E5X
P0300: Random Misfire. This seemed just like another IDM, codes for misfire and camshaft postion sensor. So I replaced the IDM. It came back the next day after the CEL started flashing as customer was exiting highway after 20 minute drive. Scan showed same codes so I threw anothe...
June 23, 2008
2003 Chevrolet Express 3500 6.0L Poor Idle Quality, Misfire VIN: 1GBHG39U43
P0300: Multiple Cylinder Misfire Detected. van will intermittently sart running poorly. missfire counters show 2,4,6,8 all miss fire. problem will come and go. looked at injetor amp ramp and no problems there. also amp ramped coils still no problems found.
June 24, 2008
2002 Nissan Altima 2.5L No Start, Poor Idle Quality, Misfire VIN: 1N4AL11D02
P0300: Multiple Misfire Detected. ... my 1st post. cust. said veh. hard to start and runs rough some times, dealer could not duplicate, I added a ground to MAF sensor ground circuit, and replaced crank sensor. Veh. hard to start after test driving and it sits for 30 min. to an hour. history c...
June 24, 2008
2003 Saturn Ion-3 2.2L Misfire VIN: 1G8AK52FX3
P0300: Random Misfire Detected. ... had MIL light on several weeks ago and local Cheveron station scanned and found code P0300, replaced origninal spark plugs with new NGK Platiniums. Returned car to customer and several days later MIL returned. Dropped into our shop and we pulled same code....
June 24, 2008
2001 Oldsmobile Aurora 3.5L Misfire, MIL Lamp on VIN: 1G3GR62H81
P0300: Multiple Cylinder Misfire Detected. So this is the worst kind of problem you can have...one on your own car... I'm in the process of buying this Aurora from my mother in law, after telling my wife for the last year that we didn't want to touch it cause these things are problem pits! It set the m...
June 25, 2008
2000 Toyota 4Runner 2.7L Misfire, MIL Lamp on VIN: JT3GM84R9Y
P0300: Multiple Cylinder Misfire Detected. ... light and it had a misfire in cyl # 3. Found #3 injector was not firing. I replace the injector but now the engine runs rough at idle and at times the miss comes back. The code also returns. Hc, co, and o2 are neer zero at idle and at higher rpms. Codes ar...
June 25, 2008
2002 Chevrolet Silverado 1500 4.3L MIL Lamp on VIN: 1GCEC14W62
P0300: Multiple Cylinder Misfire Detected. ... we have had a constant misfire code on #1 and #4 cylinder. The vehicle runs perfect and the scope pattern at the computer for the cam and crank sensors are good and do not shift or move. When I overlap the two patterns they stay in sync. Problem occurs at ...
June 26, 2008
1999 Chrysler Sebring LXi 2.5L Poor Idle Quality, Cuts out, Misfire, MIL Lamp on VIN: 4C3AU52N2X
P0300: Multiple Cylinder Misfire Detected. ... vehicle came back in running very rough and check engine light on. Found P0300 misfire code and a P1391 - loss of cam and crank sensor signal. At that time, we checked cam timing (good) fuel pressure (35-40psi) visually inspected flywheel. Replaced distrib...
June 27, 2008
1999 Ford E-250 Econoline 4.2L Hesitation, Misfire, MIL Lamp on
P0300: multiple cyl misfire. ... 5 misfire,replaced plugs,wires.Problem still there same code.Replaced cyl 5 injector and downstream o2 sensors and cleaned intake with cleaner threw vacum.After that erased codes and reran now got a code p0300 mutiple cyl misfire.Is it ...
June 27, 2008
1998 Plymouth Neon High Line 2.0L Misfire VIN: 1P3ES42Y6W
P0300: Multiple Cylinder Misfire Detected. checked cam and crank synk. good fuel pressure 50 psi when missing. fuel trim +5 when missing. compression 180-190 on all cylinders. injectors flowed and cleaned. check fuel for water non found. check for bad head gasket no problems found . smoked intake no va...
June 28, 2008
1998 Plymouth Neon High Line 2.0L Misfire VIN: 1P3ES42Y6W
P0300: Multiple Cylinder Misfire Detected. checked cam and crank synk. good fuel pressure 50 psi when missing. fuel trim +5 when missing. compression 180-190 on all cylinders. injectors flowed and cleaned. check fuel for water non found. check for bad head gasket no problems found . smoked intake no va...
June 30, 2008
2005 Jeep Grand Cherokee Laredo 3.7L Misfire VIN: 1J4GR48K95
P0300: Multiple Cylinder Misfire Detected. hi everbody. it seems #3 cylinder has the misfire. i swapped coils from #1 & #3 and also the injectors. no change with either. compression is 150. i know ther is a service bulletin or something about changing the intake valves. i think i know the fix but i...
June 02, 2008
2001 Lexus IS300 3.0L Hesitation, MIL Lamp on VIN: JTHBDN1826
P0300: Multiple Cylinder Misfire Detected. Hey guys, have here this IS300 with a hesitation on accel. It gets p to 3500 rpms and just wont go! At frist thought it was a easy fix seen codes p0171 & p0174 lean banks, so I got a denso mass air meter, and same problem the car will not accel, but now i ...
June 04, 2008
2005 Chevrolet Express 3500 6.0L Poor Idle Quality, Hesitation, Surge, Misfire, MIL Lamp on VIN: 1GCHG35U55
P0300: Multiple Cylinder Misfire Detected. ... trips to the dealer and a private goodyear repair center. It is from a fleet that i serviced for many years only to loose the account several years ago. They bought this back to me as a last resort and I am hoping that I can resolve it to get the account b...
June 05, 2008
2001 Volkswagen Beetle GLX 1.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: 3VWDD21C81
Hi guys this is my first post on iatn and it's driving me crazy, i got it from another shop, they replace coils, spark plugs, mass air flow. The problem is after sitting over night or for long period of time firts 10 sec it will misfire i conect my launch and ...
June 06, 2008
1997 Toyota 4Runner 2.7L Misfire VIN: JT3GM84R1V
P0300: Multiple Cylinder Misfire Detected. Vehicle was purchased used with aprox. 100k miles. developed a missfire on #3 cyl. Replace plugs & wires (original). Vehicle runs perfect for aprox 7k - 10k miles then starts missing on #3 cyl. Replace plug and runs perfect for another 7k-10k miles. Each t...
June 09, 2008
2002 GMC Yukon XL 1500 SLE 5.3L Misfire, MIL Lamp on VIN: 3GKFK16Z12
P0300: Multiple Cylinder Misfire Detected. Thanks in advance for all your help! I have this truck that will only misfire for about five seconds on a hot soak condition, 1 out of five times. When the problem occurs all even bank cyls. experience misfires. When this is happening cyl. #6 counts three time...
June 10, 2008
2002 Chrysler Sebring LXi 3.0L Hesitation, Cuts out, Misfire, MIL Lamp on VIN: 4C3AG52H02
P0300: Multiple Cylinder Misfire Detected. Thanks for your time,third shop to get this car,and its still not fixed.Problem is engine misfires under a load,it idles good and has plenty of power at higher rpms()2500).If you ease into the throttle it will pick-up and run fine,but with a quick snap it bogs...
June 11, 2008
2001 Cadillac DeVille 4.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G5KD54Y11
P0300: Engine Misfire Detected. Hello Everyone, I have this cadillac deville with a 4.6 and it came in with a check engine light on. I did some testing and came to determine the crank sensors were faulty. replaced them and still have the same problem. About a week a go i replaced the spark ...
June 12, 2008
2002 Volkswagen Jetta GLS 1.8L Stall VIN: WVWSE61J42
P0300: random misfire. hello techs, this VW has us scratching our heads a little. customer stated that the car stalls when ambient temp is high, after stalling the EPC light is illuminated. we scanned for codes and found those 5. the j271 relay described in the code supplies power t...
June 13, 2008
1996 Chevrolet S10 LS 2.2L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 1GCCS1943T
P0300: Multiple Engine Misfire Detected. Customer dropped truck off overnight with the complaint of poor running. The truck runs poor at idle and cruise. We have recently replaced the fuel pump and filter for a no start condition and performed a tune (plugs & wires) on the truck per maintenance. ...
June 14, 2008
2000 Jeep Cherokee Sport 4.0L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1J4FF48S9Y
P0300: Multiple Cylinder Misfire Detected. Car came in for gas smell. We found #1 injector leaking fuel into cylinder. Replaced injector and plugs. Cleared codes and sent it on its way. 3 weeks later came back in with identical trouble codes. Leaning toward cam sensor but it looked fine on the scope an...
June 16, 2008
1999 Cadillac Seville SLS 4.6L Poor Idle Quality, Hesitation, Cuts out, Misfire VIN: 1CWZ2349ZY
P0300: Engine Misfire Detected. hey everyone i have a 99 seville sts came in with a po300 randome misfire and a po741 tcc stuck off this car backfires through the intake and runs terrible dont do much on transmissions but can this misfire code and the way it runs set the trans code if drove ...
June 18, 2008
1998 Isuzu Rodeo S 2.2L Poor Idle Quality, Cuts out, Misfire, MIL Lamp on VIN: 4S2CK58D3W
P0300: Multiple Cylinder Misfire Detected. ... insight into this vehicles problem. Vehicle came into shop with a steady check engine light on and a history code for #4 cylinder misfire, po304, but at the time was not misfireing. Tech started diagnosis and found oil in all spark plug journals from leaki...
June 18, 2008
2002 Jaguar X-Type 3.0L Misfire, MIL Lamp on VIN: CAJEA51C22
P0300: random misfire. after install of new engine have a constant engine light have checked cylinder compression all at 150 psi, spark plugs are new irridiums, snapon fuelkare, checked injector spay by cranking over all have a nice even spray, checked for vacum leaks at intake, inj...
June 18, 2008
2002 Jaguar X-Type 3.0L Misfire, MIL Lamp on VIN: CAJEA51C22
P0300: random misfire. after install of new engine have a constant engine light have checked cylinder compression all at 150 psi, spark plugs are new irridiums, snapon fuelkare, checked injector spay by cranking over all have a nice even spray, checked for vacum leaks at intake, inj...
June 19, 2008
2001 Oldsmobile Aurora 3.5L Misfire, MIL Lamp on VIN: 1G3GR62H81
P0300: Multiple Cylinder Misfire Detected. So this is the worst kind of problem you can have...one on your own car... I'm in the process of buying this Aurora from my mother in law, after telling my wife for the last year that we didn't want to touch it cause these things are problem pits! It set the m...
June 19, 2008
1998 Isuzu Rodeo S 2.2L Poor Idle Quality, Cuts out, Misfire, MIL Lamp on VIN: 4S2CK58D3W
P0300: Multiple Cylinder Misfire Detected. ... insight into this vehicles problem. Vehicle came into shop with a steady check engine light on and a history code for #4 cylinder misfire, po304, but at the time was not misfireing. Tech started diagnosis and found oil in all spark plug journals from leaki...
June 20, 2008
1999 Saab 9-5 SE 2.3L Cuts out VIN: YS3EF48E5X
P0300: Random Misfire. This seemed just like another IDM, codes for misfire and camshaft postion sensor. So I replaced the IDM. It came back the next day after the CEL started flashing as customer was exiting highway after 20 minute drive. Scan showed same codes so I threw anothe...
June 23, 2008
2003 Chevrolet Express 3500 6.0L Poor Idle Quality, Misfire VIN: 1GBHG39U43
P0300: Multiple Cylinder Misfire Detected. van will intermittently sart running poorly. missfire counters show 2,4,6,8 all miss fire. problem will come and go. looked at injetor amp ramp and no problems there. also amp ramped coils still no problems found.
June 24, 2008
2002 Nissan Altima 2.5L No Start, Poor Idle Quality, Misfire VIN: 1N4AL11D02
P0300: Multiple Misfire Detected. ... my 1st post. cust. said veh. hard to start and runs rough some times, dealer could not duplicate, I added a ground to MAF sensor ground circuit, and replaced crank sensor. Veh. hard to start after test driving and it sits for 30 min. to an hour. history c...
June 24, 2008
2003 Saturn Ion-3 2.2L Misfire VIN: 1G8AK52FX3
P0300: Random Misfire Detected. ... had MIL light on several weeks ago and local Cheveron station scanned and found code P0300, replaced origninal spark plugs with new NGK Platiniums. Returned car to customer and several days later MIL returned. Dropped into our shop and we pulled same code....
June 24, 2008
2001 Oldsmobile Aurora 3.5L Misfire, MIL Lamp on VIN: 1G3GR62H81
P0300: Multiple Cylinder Misfire Detected. So this is the worst kind of problem you can have...one on your own car... I'm in the process of buying this Aurora from my mother in law, after telling my wife for the last year that we didn't want to touch it cause these things are problem pits! It set the m...
June 25, 2008
2000 Toyota 4Runner 2.7L Misfire, MIL Lamp on VIN: JT3GM84R9Y
P0300: Multiple Cylinder Misfire Detected. ... light and it had a misfire in cyl # 3. Found #3 injector was not firing. I replace the injector but now the engine runs rough at idle and at times the miss comes back. The code also returns. Hc, co, and o2 are neer zero at idle and at higher rpms. Codes ar...
June 25, 2008
2002 Chevrolet Silverado 1500 4.3L MIL Lamp on VIN: 1GCEC14W62
P0300: Multiple Cylinder Misfire Detected. ... we have had a constant misfire code on #1 and #4 cylinder. The vehicle runs perfect and the scope pattern at the computer for the cam and crank sensors are good and do not shift or move. When I overlap the two patterns they stay in sync. Problem occurs at ...
June 26, 2008
1999 Chrysler Sebring LXi 2.5L Poor Idle Quality, Cuts out, Misfire, MIL Lamp on VIN: 4C3AU52N2X
P0300: Multiple Cylinder Misfire Detected. ... vehicle came back in running very rough and check engine light on. Found P0300 misfire code and a P1391 - loss of cam and crank sensor signal. At that time, we checked cam timing (good) fuel pressure (35-40psi) visually inspected flywheel. Replaced distrib...
June 27, 2008
1999 Ford E-250 Econoline 4.2L Hesitation, Misfire, MIL Lamp on
P0300: multiple cyl misfire. ... 5 misfire,replaced plugs,wires.Problem still there same code.Replaced cyl 5 injector and downstream o2 sensors and cleaned intake with cleaner threw vacum.After that erased codes and reran now got a code p0300 mutiple cyl misfire.Is it ...
June 27, 2008
1998 Plymouth Neon High Line 2.0L Misfire VIN: 1P3ES42Y6W
P0300: Multiple Cylinder Misfire Detected. checked cam and crank synk. good fuel pressure 50 psi when missing. fuel trim +5 when missing. compression 180-190 on all cylinders. injectors flowed and cleaned. check fuel for water non found. check for bad head gasket no problems found . smoked intake no va...
June 28, 2008
1998 Plymouth Neon High Line 2.0L Misfire VIN: 1P3ES42Y6W
P0300: Multiple Cylinder Misfire Detected. checked cam and crank synk. good fuel pressure 50 psi when missing. fuel trim +5 when missing. compression 180-190 on all cylinders. injectors flowed and cleaned. check fuel for water non found. check for bad head gasket no problems found . smoked intake no va...
June 30, 2008