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P0300 Diagnostic Trouble Code Discussion for April 2009

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
1996 Chevrolet C1500 Cheyenne 4.3L Misfire, MIL Lamp on VIN: 1GCEC14W7T
P0300: Multiple Cylinder Misfire Detected. This misfire occurs only during "normal" driving.During heavy acceleration and idling NO misfires,runs perfectly!With engine RPM below 2500rpm under load all cylinders randomly misfire,sometimes badly.Cam timing was at -18*,after adj. now at -15*.Durin...
April 01, 2009
2002 Chevrolet Express 2500 5.7L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GCGG25R02
P0300: Multiple Cylinder Misfire Detected. Misfire Data shows cylinders #5,7,8 missing like crazy at idle. When I run a injector balance test with Master Tech cylinders 5,6,7,8 show no drop in RPM as do you feel no difference in the engine as you do with the front four injectors. THe front injectors yo...
April 01, 2009
2004 Chevrolet Impala 3.4L Poor Idle Quality VIN: 2G1WF52E84
P0300: Multiple Cylinder Misfire Detected. Greetings GM Techs, I have a very frustrating problem here. This occurs during idle only. Cylinder #6 will miss fire every 4 seconds, when it miss fires it will last for about 5 seconds, then idle smoothly for 4 seconds, then back to miss firing for 5 seconds....
April 01, 2009
2004 Chevrolet Impala 3.4L Poor Idle Quality VIN: 2G1WF52E84
P0300: Multiple Cylinder Misfire Detected. Greetings GM Techs, I have a very frustrating problem here. This occurs during idle only. Cylinder #6 will miss fire every 4 seconds, when it miss fires it will last for about 5 seconds, then idle smoothly for 4 seconds, then back to miss firing for 5 seconds....
April 02, 2009
2008 Dodge Ram 1500 Truck SXT 5.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1D7HU18278
P0300: Random mutiple misfires. This truck got water in fuel tank at a service station. Truck died within 1 mile of service station. Towed to shop and evacuated fuel tank. Put in clean fuel. Still ran rough at idle and no power on the road. Almost did not make it back to shop. Replaced plugs...
April 02, 2009
2003 Ford Focus SE 2.0L Cuts out, Misfire, MIL Lamp on VIN: 1FAFP34303
P0300: multi cylinder misfire. vehicle has intermitent hesatation and now misfire. hesatation first noticed at cruise speed durning downshift. stubbling and misfire noticed at latter date when coming off idle speed. Code p0004 pressure module was found under KOER test but can not find discr...
April 02, 2009
2003 Ford Focus SE 2.0L Cuts out, Misfire, MIL Lamp on VIN: 1FAFP34303
P0300: multi cylinder misfire. vehicle has intermitent hesatation and now misfire. hesatation first noticed at cruise speed durning downshift. stubbling and misfire noticed at latter date when coming off idle speed. Code p0004 pressure module was found under KOER test but can not find discr...
April 03, 2009
2000 Toyota Echo 1.5L Poor Idle Quality, Stall, MIL Lamp on VIN: JTDBT1236Y
P0300: Multiple Cylinder Misfire Detected. This car came in with a stall at idle when cold. I found the VVT valve broken so I replaced it. I checked Base Timing and it is o.k. These codes came back and it won't idle cold. Any help with this would be greatly appriciated. Mike
April 03, 2009
2002 Pontiac Grand Am SE 2.2L Poor Idle Quality, Stall
P0300: Multiple Cylinder Misfire Detected. This car is surging and idling rough,also has noise in chain area. I read in the knowledge base that a Cavalier with same symptoms had cam timing issue. My fuel pressure, fuel trims and compression check O.K. Vacuum at idle is low, IAC numbers are at 120 and s...
April 06, 2009
1997 Kia Sportage 2.0L Poor Idle Quality, MIL Lamp on VIN: KNDJA7232V
P0300: Random Cylinder Misfire Detected. Hi group, this Kia starts up good but starts to run rough sometimes the computer goes in and out of closed loop the coolant temp stays the same about 190 the other sensors look fine but when you drive this it starts loosing power the o2 goes toward 0 as it slo...
April 07, 2009
2006 Ford F-250 Super Duty XLT 5.4L Hesitation, Surge, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1FTNX20566
P0300: Random Misfire Detected. vehicle came in with customer stating vehicle died at a light then restarted fine, under hard excelleration vehicle hesitates and lacks power not sure where to start on this one any help would be appreciated...thanx in advance
April 08, 2009
2003 Honda Odyssey EX 3.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: 5FNRL1894B
P0300: Random Misfire Detected. have checked all plugs good compression 190 all cylinders replaced fuel pressure regulator in hopes of getting control of fuel pressure spec is 35-48 psi no vacuum on regulator is 60 no vacuum if add vacuum will drop to 52psi called the dealer and one of their...
April 08, 2009
2005 Chrysler Town & Country (Van) Limited 3.8L Misfire VIN: 2C4GP64L05
P0300: testing and results. Good Afternoon All. I have a problem Chrysler T&C that came in with a number 3 misfire, as well as, a random misfire. I pulled #3 plug out and it was cracked and appears to have not been firing for sometime. Replaced plugs and wires but I still have a miss...
April 09, 2009
2003 Dodge Ram 1500 Truck 5.7L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 1D7HA16D13
P0300: Multiple Cylinder Misfire Detected. ... pretty unfamiliar with this particular system and that I'm not able to devote the time I should be to troubleshooting this vehicle. I run a 1 man shop and I have a hard time making this vehicle a prioroity, but it's my next door neighbor's son's truck. Sor...
April 09, 2009
2003 Honda Odyssey EX 3.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: 5FNRL1894B
P0300: Random Misfire Detected. have checked all plugs good compression 190 all cylinders replaced fuel pressure regulator in hopes of getting control of fuel pressure spec is 35-48 psi no vacuum on regulator is 60 no vacuum if add vacuum will drop to 52psi called the dealer and one of their...
April 09, 2009
1999 Kia Sportage 2.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: KNDJB723XX
P0300: Random Cylinder Misfire Detected. We have confirmed compression good on all cyl. Good spark at each plug. Each injector pulse test ok. We noticed #1 inj. on the noid light is dim at idle, but brightens up when you speed up engine. We have checked the voltage on the supply wire(green) and it st...
April 09, 2009
2000 Chevrolet Impala LS 3.8L Cuts out, Stall VIN: 2G1WH55K0Y
P0300: Multiple Cylinder Misfire Detected. after warm up vehicle stalhs and doesnot want to restart. when vehicle is cold runs perfact for about 10 minutes. when scanning with the brick we see no desired idle, no TPS percentage we do have TPS voltage all other readings look good. We have good spark, ev...
April 10, 2009
2005 Chrysler Town & Country (Van) Limited 3.8L Misfire VIN: 2C4GP64L05
P0300: testing and results. Good Afternoon All. I have a problem Chrysler T&C that came in with a number 3 misfire, as well as, a random misfire. I pulled #3 plug out and it was cracked and appears to have not been firing for sometime. Replaced plugs and wires but I still have a miss...
April 10, 2009
2003 Dodge Ram 1500 Truck 5.7L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 1D7HA16D13
P0300: Multiple Cylinder Misfire Detected. ... pretty unfamiliar with this particular system and that I'm not able to devote the time I should be to troubleshooting this vehicle. I run a 1 man shop and I have a hard time making this vehicle a prioroity, but it's my next door neighbor's son's truck. Sor...
April 10, 2009
1997 Plymouth Grand Voyager SE 3.0L Misfire, MIL Lamp on VIN: 2P4GP4434V
P0300: Multiple Cylinder Misfire Detected. Customer brought vehicle back to the dealer they bought it from with a check engine light on. They replaced the cap,rotor,plugs,and wires. Customer drove van for two days and the light came back on. Brought van back and now we got it to find problem. We rechec...
April 10, 2009
1999 Nissan Sentra XE 1.6L Misfire, MIL Lamp on VIN: 3N1AB41DOX
P0300: Multiple Misfire Detected. This car has been to 2 DIFF SHOPS. The client brought it to me because after daily use of about 30mins, the car begins to misfire and lose power. Hot Idle is perfect. But on acceleration is when it begins to missfire and lose power. All those parts were change...
April 11, 2009
2003 Chevrolet Avalanche 1500 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 3GNEC13T23
P0300: Multiple Cylinder Misfire Detected. this truck misfires at idle ,has p0300 ,on misfire screen shows #4 and #5 misfire only at idle.once the rpm in raised to about 2000 it smooth.i swaped coils,injectors,wires,plugs but,it always misfires on 4 and 5.thanks for any tips.
April 13, 2009
1997 Plymouth Voyager 3.3L Misfire, MIL Lamp on VIN: 2P4FP2534V
P0300: Multiple Cylinder Misfire Detected. I hope that someone can help with this van.it has a very extreme missfire when engine temp hits about 200. i tested spark. found plugs to be fouled out and suggested full tune up. also found that cylinder 6 had only 70 psi for compression. leak tested and foun...
April 13, 2009
2003 Chevrolet Avalanche 1500 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 3GNEC13T23
P0300: Multiple Cylinder Misfire Detected. this truck misfires at idle ,has p0300 ,on misfire screen shows #4 and #5 misfire only at idle.once the rpm in raised to about 2000 it smooth.i swaped coils,injectors,wires,plugs but,it always misfires on 4 and 5.thanks for any tips.
April 14, 2009
2000 Chrysler Sebring LX 2.5L Misfire, MIL Lamp on VIN: 4C3AU42N0Y
P0300: Multiple Cylinder Misfire Detected. this is a good custumer of mine and she has been in three times for a flashing ses light at highway speeds only after 3omins of driving. i have not duplicated the condition and i am hard pressed to just throw a 800$ distibuter at it without hard proof. she is ...
April 14, 2009
2001 Oldsmobile Aurora 4.0L Misfire, MIL Lamp on VIN: 1G3GS64C51
P0300: Multiple Cylinder Misfire Detected. ... electrical and driveability concerns. Upon initial inspection I found the negative battery cable loose from stereo installation. repaired and everything is normal other than flashing check engine and code P0300 stored. Found cylinder 5 missing at idle on m...
April 14, 2009
2003 Cadillac CTS 3.2L Misfire, MIL Lamp on VIN: 1G6DM57N93
P0300: Multiple Cylinder Misfire Detected. Vehicle came to shop misfire always customer states accessary drive (serpintine) belt broke engine overheated. Customer replaced belt and brought to shop. I retrieved codes pulled plugs from right bank and checked compression results 125 - 130psi. There is onl...
April 15, 2009
1996 Chevrolet Blazer 4.3L Surge, Misfire VIN: 1GNDT13WXT
P0300: Multiple Cylinder Misfire Detected. Hello all this blazer first came in for a check engine light on and flashing at times had p0151 and 302 304 306 codes found tsb on this checked o2 sensor connector found corrosion changed o2 sensor and harness per tsb. customer had to have it right a way well ...
April 15, 2009
2000 Chrysler Sebring LX 2.5L Misfire, MIL Lamp on VIN: 4C3AU42N0Y
P0300: Multiple Cylinder Misfire Detected. this is a good custumer of mine and she has been in three times for a flashing ses light at highway speeds only after 3omins of driving. i have not duplicated the condition and i am hard pressed to just throw a 800$ distibuter at it without hard proof. she is ...
April 15, 2009
2003 Volkswagen Passat GLS 1.8L MIL Lamp on VIN: WVWPD63BX3
P0300: misfire recognition. ... or acce,check spark plugs,ignition cyl #2,check sensor (green sensor).erase codes. car came back with same codes within two days(p0300, p0302,p2181). check ground cable from battery to body and from body to engine.at this time i have no idea what to do.you...
April 15, 2009
1999 Chevrolet Astro 4.3L Misfire, MIL Lamp on VIN: 1GNDM19W8X
P0300: Multiple Cylinder Misfire Detected. Hey guys, here we go again. I have a vehicle in that has the check engine light on. I have checked the codes and it showed PO300, random misfire. I have done a tune-up which included, cap, rotor, wires, plugs, fuel filter and air filter. I have also cleaned th...
April 16, 2009
2004 Chevrolet Trailblazer EXT LT 4.2L Hesitation, Poor Fuel Economy, No Power VIN: 1GNET16S34
P0300: Multiple Engine Misfire Detected. Here we go again. Got this Trailblazer thats giving me fits. Came in with a complaint of no power. Test drove and verified. Engine won't rev past 4500rpm in any gear. will run interstate speeds if you give it enough time. Pulled code and found P0014. Found inf...
April 16, 2009
2004 Chevrolet Malibu 3.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G21W53664
P0300: Multiple Engine Misfire Detected. customer had car towed to my house for running very badly. after checking out found misfire on cylinders 1, 3, 5,. 5 cylinder all the time and 1 and 3 under load. swap plugs and wires around no change spark good on all cylinders. pulled intake and check inject...
April 16, 2009
1999 Chevrolet Astro 4.3L Misfire, MIL Lamp on VIN: 1GNDM19W8X
P0300: Multiple Cylinder Misfire Detected. Hey guys, here we go again. I have a vehicle in that has the check engine light on. I have checked the codes and it showed PO300, random misfire. I have done a tune-up which included, cap, rotor, wires, plugs, fuel filter and air filter. I have also cleaned th...
April 17, 2009
1994 Chrysler New Yorker 3.5L Hesitation, Cuts out, Misfire VIN: 2C3ED446F4
P0300: random misfire. the vehicle runs irractic on accel. & under a load above 1500 rpm. the tac fluctuates irratic & the cruise control light flashes when the break up occurs. we we tried a computer out of a running vehicle, crank sensor, tried another good coil pack, new ...
April 17, 2009
1997 Plymouth Grand Voyager SE 3.0L Misfire, MIL Lamp on VIN: 2P4GP4434V
P0300: Multiple Cylinder Misfire Detected. Customer brought vehicle back to the dealer they bought it from with a check engine light on. They replaced the cap,rotor,plugs,and wires. Customer drove van for two days and the light came back on. Brought van back and now we got it to find problem. We rechec...
April 17, 2009
2002 Nissan Altima 2.5L Poor Idle Quality, Misfire VIN: 1N4AL11D12
P0300: Multiple Misfire Detected. costumer wos told needs head gasket by deler.no coolant leaks found and itis not loosing colant.cold start problem only idles rough for 20 sec and it rans good after with no problem at all.thank you in advance for any help.
April 18, 2009
1999 Chevrolet Astro 4.3L Misfire, MIL Lamp on VIN: 1GNDM19W8X
P0300: Multiple Cylinder Misfire Detected. Hey guys, here we go again. I have a vehicle in that has the check engine light on. I have checked the codes and it showed PO300, random misfire. I have done a tune-up which included, cap, rotor, wires, plugs, fuel filter and air filter. I have also cleaned th...
April 20, 2009
2002 Mercedes-Benz CL600 5.8L Misfire VIN: WDBPJ78J02
P0300: multiple cyl missfire. PERFORMED OIL CHANGE ON THIS VEHICLE A FEW DAYS AGO. CUSTOMER RETURNED WITH OIL LEAKING FROM OIL FILLER CAP. IF THE OIL FILLER CAP IS TURNED SLIGHTLY PAST THE LOCKING POSITION, IT WILL COCK THE SEAL AND CAUSE OIL TO LEAK OUT UNDER ACCELERATION. CLEANED AREA O...
April 20, 2009
2002 Chevrolet Silverado 1500 4.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GCEC14W22
P0300: Multiple Cylinder Misfire Detected. Hi everyone, Vehicle is skipping pretty badly. History misfires show clearly that #4 and 6 are the culprit. I changed plugs and looked at the cap and rotor-looked good. Vacum readings are steady and high. Compression is 175psi on both problem cylinders. I no...
April 21, 2009
2002 Ford Explorer XLS 4.0L Excessive Emissions, Misfire, MIL Lamp on VIN: 1FMZU72K42
P0300: random misfire detected. looking for some help guys, we have this 2002 explorer that at an idle seems to run pretty smooth but as soon as you put it into drive it starts misfiring and surging. if you take it up off of idle and drive it, it runs great. we cleaned the mass airflow senso...
April 22, 2009
1997 Infiniti Q45 4.1L Poor Idle Quality, Misfire VIN: JNKBY31D0V
P0300: Multiple Misfire Detected. ... here is the story. Customer said the low fuel indicator came on and shorty after came to a stop and that when the problem occurred. The vehicle start to run rough. So, the customer replaced the his fuel filter;but, it did not fix his problem. When I looke...
April 23, 2009
1997 Chevrolet Malibu 3.1L Surge, MIL Lamp on, SURGES AT IDLE ONLY VIN: 1G1ND52MXV
P0300: Multiple Cylinder Misfire Detected. ... starts and runs great until it goes into closed loop. then, idle surges rapidly as long as you sit and idle - will stop when put in gear. only very seldom will do it at a long red lite., fuel trims go to -18%, o2 shows full lean exhaust, all other systems ...
April 24, 2009
1998 Chevrolet Malibu 2.4L Excessive Emissions, Poor Idle Quality, Misfire VIN: 1G1ND52T3W
P0300: Multiple Cylinder Misfire Detected. ... I am a FORD tech and thought I knew GMs , but this one is killing me! I have a 9-98 Chevy Malibu with a 2.4 and it runs like crap. Code present is P0300, idles terrible but runs OK down the road. At idle it also smells, you guys know, that eye burning sme...
April 24, 2009
2000 Ford Explorer XLS 4.0L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 1FMYU60E3U
P0300: multiple random misfire. i have aquired this 2000 for explorer sport from another mechanic that has replaced most basic items to attempt to repair the stalling and misfire issue, the girl that drives this vehicle is in medical school and she can never drop the vehicle off for more tha...
April 24, 2009
1997 Infiniti Q45 4.1L Poor Idle Quality, Misfire VIN: JNKBY31D0V
P0300: Multiple Misfire Detected. ... here is the story. Customer said the low fuel indicator came on and shorty after came to a stop and that when the problem occurred. The vehicle start to run rough. So, the customer replaced the his fuel filter;but, it did not fix his problem. When I looke...
April 24, 2009
1998 Volvo S70 2.4L Misfire VIN: YV1LS5585W
P0300: Random missfire. ... the winter/economy bottom on center console flashing. I checked for codes and found P0123, P0120, P0300, P0302, P0305, and 2 other codes for the air injection system. I disconnected the ba...
April 24, 2009
2002 Toyota Highlander 3.0L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: JTEHF21A82
P0300: Multiple Cylinder Misfire Detected. ... missfire, never happenned when i test drove. two weeks ago missfire was constant under any load, checked codes p0300, p0301 random missfire and number one missfire. replaced spark plugs, coil over plug and number one hard t...
April 26, 2009
2004 Dodge Ram 1500 Truck ST 5.7L Hesitation, Misfire, MIL Lamp on VIN: 1D7HU16D24
P0300: Multiple Misfire Detected. has anyone seen a problem like this on a hemi? thanks in advance for any help. this truck acts up intermittantly and feel very similiar to a secondary ignition misfire. it will misfire under load but not a high rpms. when its throwing its fit you can make it m...
April 27, 2009
2002 Audi A6 3.0L Poor Idle Quality, Surge, Cuts out, Stall, MIL Lamp on VIN: WAULT64B82
P0300: . ... with the idle control on this vehicle. this vehicle came in with a cel light and a rolling idle. the idle fluctuates about 500-700 rpm from 500 to about 1300 rpm when the vehicle is running in park. its also noticeable in gear. the codes found are: p0102, ...
April 28, 2009
2002 Chevrolet Astro LS 4.3L Misfire VIN: 1GNEL19X82
P0300: Multiple Cylinder Misfire Detected. greetings to all this astro van had come in for misfire codes.started doing some testing and i saw cylinder 4 misfiring while watching my misfire counters.i swapped plugs and wires with cyl2 and the mis stayed acylinder 4.i proceeded to do a compression test o...
April 28, 2009
2000 Acura TL 3.2L Stall, Misfire VIN: 19UUA5663Y
P0300: Multiple Misfire Detected. Help Acura Techs! This TL has got us chasing our tails. The vehicle will start and run well cold but if left sitting and idling once it is hot it will stumble very slightly on the first throttle application. Once shut off and restarted hot (15+ minutes) it wil...
April 30, 2009
2001 Mazda Protege LX 2.0L Poor Idle Quality, Cuts out, Misfire, MIL Lamp on VIN: JM18J22521
P0300: Multiple Misfire Detected. ... The body shop replaced the radiator. they filled antifreeze in and created a big vapor lock in the engine block. Customer came to me with a complaint of heater not warm. The water pump was leaking (melted). I replaced the water pump and i was suspecting a...
April 30, 2009
2002 Volkswagen Beetle Sport 1.8L Misfire, MIL Lamp on VIN: 3VWED21C62
P0300: random missfire. This car has a miss fire only when cold. Will start up and idle well however right after you rev it you can watch the miss fires on all cylinders in the data blocks. It has no overheating concerns although I may need to test drive it in different conditions. ...
April 30, 2009