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P0300 Diagnostic Trouble Code Discussion for September 2008

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
1998 Ford F-150 Lariat 4.6L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire VIN: 1FTZX17W3W
P0300: random cylinder misfire. Good morning all iATN members.Have this ford f-150 with a bad running problem.It came in smoking out of the exaust-no power-the idle is constanly up and down-the gas smelled bad so we drained it,replace fuel filter and put in 7 gallons.I started with the basic...
September 02, 2008
1996 Chevrolet Camaro 3.8L Hesitation, Cuts out, Misfire VIN: 2G1FP22V9T
P0300: Multiple Engine Misfire Detected. car came in about a month ago for tune up customers request replace wires and plugs fuel filter car came back 2 days after tune up found cylinder 5 misfire i look over the last technicians work found that cylinder 5 spark plug was damage replace it ran great c...
September 03, 2008
2006 Ford E-150 4.6L Misfire, MIL Lamp on VIN: 1FTRE14WX6
P0300: random miss fire. ... will begin to miss fire and the check engine light will flash. At the time he brought it in there was no problem, I did find DTC"S P0300, P0305, and P0303, I replace the ignition coils on...
September 05, 2008
1997 Buick Regal LS 3.8L Misfire VIN: 2G4WB52K5V
P0300: Engine Misfire Detected. this vehical runs fine when driving normal but when you put it under a load such as tring to take off fast ,pass someone or going up a hill number one cylinder misfires.ive tried switching injectors,switching coils,new ignition module,new plugs and wires and p...
September 09, 2008
2004 Subaru Impreza WRX 2.0L Poor Idle Quality, Hesitation, Stall, Misfire, MIL Lamp on VIN: JF1GD29624
P0300: Multiple Cylinder Misfire Detected. vehicle has a rough idle and hesitation in acceleration. found 3.754 volts at front a/f sensor and rear o2 sensor has 0.075 volts and fluctuates very slowly - never above o.100 volts. short term fuel trim 25%.
September 10, 2008
2002 Toyota Tacoma DLX 3.4L Misfire, MIL Lamp on VIN: 5TEWN72N72
P0300: Multiple Cylinder Misfire Detected. Hi there I have this Tacoma that is being quite difficult. It has had this concern with setting cylinder #1 misfire codes for about 2 years now. The local Toyota dealer had it first and they sold him a full tune-up with plugs wires and injector cleaning. Pro...
September 13, 2008
1998 Buick LeSabre Custom 3.8L No Start, Misfire VIN: 1G4HP52K8W
P0300: Engine Misfire Detected. IATN Strikes again! Vehicle came as no start no run.Good spark.,Good fuel Pressure.;Had Code PO300.Pulled plugs all fouled.Replaced Plugs & Wires vehicle started with large cloud of smoke.I'm thinking that plugs were gas fouled cyl. loaded with fuel.Took c...
September 15, 2008
1997 Chevrolet K1500 4.3L Poor Idle Quality VIN: 1GCEK14WXV
P0300: Multiple Cylinder Misfire Detected. ... going on the highway this truck hesitates.the customer complained that the problem looks fuel related.i hooked up the scanner and and got p0300,egr code,and short or open for sending unit signal.when you look at the misfire data it shows the misfire counts...
September 15, 2008
2002 Audi A4 3.0L Misfire, MIL Lamp on VIN: WAULT68E52
P0300: Random/multiple misfire. OK, This one is weirding me out, so thought Id ask as it seems like something native AUDI/VW that Im unaware of. The description lists this as a MISFIRE concern, the MIL agrees, but I dont as of yet. The vehicle got the timing belt job, then redid belt for mil...
September 16, 2008
1997 Chevrolet K1500 4.3L Poor Idle Quality VIN: 1GCEK14WXV
P0300: Multiple Cylinder Misfire Detected. ... going on the highway this truck hesitates.the customer complained that the problem looks fuel related.i hooked up the scanner and and got p0300,egr code,and short or open for sending unit signal.when you look at the misfire data it shows the misfire counts...
September 16, 2008
2000 Dodge Intrepid 2.7L MIL Lamp on VIN: 2B3HD46R2Y
P0300: Multiple Cylinder Misfire Detected. ... use some help on this one. We are working on a 2000 Dodge Intrepid with a 2.7 fed. emisions engine. It keeps setting a P0300 with 302,304,305 pending. Vehicle has new plugs (Champion O.E.), no noticeable miss hot or cold...
September 16, 2008
2002 Hyundai Sonata 2.4L Misfire, MIL Lamp on VIN: KMHWF25S62
P0300: Multiple Misfire Detected. we thought timing belt was the main problem, however after returning the car to the owner, the same problem occured again with all codes returning but code p0340, we retested and replaced spark plugs, flushed injection system and throttle body, maf sensor. the...
September 16, 2008
2004 Nissan Altima SE 3.5L Poor Idle Quality, MIL Lamp on VIN: 1N4BL11D54
P0300: Multiple Misfire Detected. hey all,thanks in advance.have this nissan in here that had been at local dealer for diagnosis.dealer rec timing chains and guides for repair.vehicle brought to me.replaced all 3 timing chains and guides.vehicle has same problem.runs rough at idle sets codes p...
September 16, 2008
2000 Cadillac DeVille 4.6L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on, multiple codes VIN: 1G6KD54Y2Y
P0300: Engine Misfire Detected. i think it needs ckp sensors but wanted second opinion or more .
September 17, 2008
2001 Chevrolet Blazer LS 4.3L Misfire VIN: 1GNDT13W51
P0300: Multiple Cylinder Misfire Detected. ... used the help request so forgive me if I am missing any pertinant info. This Blazer came in with a MIL on and a P0300 stored. No noticable misfire presant but when monitoring misfire counter on scan tool it shows a bad miss on #2 cyl above 1400 rpm in neut...
September 18, 2008
2000 Dodge Intrepid 2.7L MIL Lamp on VIN: 2B3HD46R2Y
P0300: Multiple Cylinder Misfire Detected. ... use some help on this one. We are working on a 2000 Dodge Intrepid with a 2.7 fed. emisions engine. It keeps setting a P0300 with 302,304,305 pending. Vehicle has new plugs (Champion O.E.), no noticeable miss hot or cold...
September 18, 2008
1999 Infiniti QX4 3.3L Poor Idle Quality, Hesitation, MIL Lamp on VIN: JNRAR07Y7X
P0300: Multiple Misfire Detected. so we did 2-4-6 injectors remn cap wires rotor new plugs air gas smoke for leaks slight leak out of egr and inake snorkel i seal intake hose for now but still runs bad...any ideas
September 18, 2008
2003 Kia Rio Cinco 1.6L Poor Idle Quality, MIL Lamp on VIN: KNADC16533
P0300: Random Cylinder Misfire Detected. Good day people. I have this KIA Rio that idles very rough. MIL will come on and transmission will not down shift into passing gear when throttle pedal floored. When vehicle came in first time had codes for MAF sensor and system too lean. No reading out of MAF...
September 18, 2008
2002 Nissan Altima 2.5L Hesitation, Surge, Misfire VIN: 1N4AL11D62
P0300: Multiple Misfire Detected. This vehicle surges when idling in drive or reverse as soon as you let off the brake and begin to roll up to 5MPH. Also surges when cruising at 40 MPH and when you slow down from 5-0 MPH. There is a bulletin NTB01-074A which describes this similiar issue, bu...
September 18, 2008
2003 Kia Rio Cinco 1.6L Poor Idle Quality, MIL Lamp on VIN: KNADC16533
P0300: Random Cylinder Misfire Detected. Good day people. I have this KIA Rio that idles very rough. MIL will come on and transmission will not down shift into passing gear when throttle pedal floored. When vehicle came in first time had codes for MAF sensor and system too lean. No reading out of MAF...
September 19, 2008
2000 Nissan Sentra GXE 1.8L No Start, Poor Idle Quality, Cuts out, Stall, Misfire, MIL Lamp on VIN: 3N1CB51D4Y
P0300: Multiple Misfire Detected. when car does start-it is so lean, it turn the cat red in minutes--ran with cat disconnected--car runs the same--injectors and coils seem intermittent--rpm does not drop out--very limited data on modis-suspecting cam or crank sensor problem-but not much nissan...
September 21, 2008
1997 Chevrolet Astro 4.3L Poor Idle Quality, Misfire VIN: 1GNEL19W6V
P0300: Multiple Cylinder Misfire Detected. Vehicle came in running very poorly. Very rough idle with considerable power loss. Cust had tune-up and fuel sys flush done at another garage which did not help problem. Found slightly leaking EGR and replaced valve. Also found fuel pressure leak down and repl...
September 22, 2008
2004 Dodge Durango SLT 4.7L Misfire VIN: 1D4HB48N94
P0300: Multiple Misfire Detected. Thanks for taking time to help w/this mess. Have dead mifire concerns. Found cyl#3 only affected cylinder (no change if spark/fuel removed). Found the following: -Have injector pulses -Have coil pulses Coil very white/chalky. No change w/new. -Compression 120p...
September 22, 2008
1998 Honda Passport EX 3.2L Misfire, MIL Lamp on, po300 VIN: 4S6CM58W4W
P0300: Random Misfire Detected. Vehicle under load misfires on cyl 1,3,5 o2 on bank one reads 800mv or more. Not loosing ignition on scope while monitoring misfire counter on scanner.Pulse width stays normal but computer starts to lean pulse width on 1,3,5. Backpressure on exhaust at 1.5-2 l...
September 22, 2008
1996 Jaguar XJ6 4.0L Excessive Emissions, Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: SAJHX1743T
P0300: Random cylinder misfire. ... August. Found DTCs stored for knock sensor circuit fault, EGR insufficient flow and catalyst efficiency below threshold. Removed EGR valve and adapter plate. Cleaned EGR passages. Researched knock sensor code, found indication possibly related to EGR code....
September 22, 2008
2002 Buick LeSabre Custom 3.8L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1G4HP54K92
P0300: Multiple Engine Misfire Detected. Greetings. This 2002 Lesabre has a miss in it. Along with the miss is a rattle noise. Have checked spark plug(and tried new one with no luck), checked fuel pressure which is ok, checked injector flow--ok, checked for vacuum leaks(twice) and none found. Ohmed s...
September 24, 2008
2001 Cadillac Catera 3.0L No Start, Stall, Misfire
P0300: Multiple Cylinder Misfire Detected. This car has misfire on all 6 cylinders. Will do this cold, and if you play with the throttle and get it a little warm, it will run on its own. However, under a load it will still misfire. Have tried new coil packs for both engine banks. Scanner indicates the ...
September 25, 2008
2001 Chevrolet S10 4.3L Misfire VIN: 1GTCT19W11
P0300: Multiple Engine Misfire Detected. Hi guys, This truck is driving me crazy, I'm loosing my hair I got left. I am working on this truck for shown severe misfire on cylinder 1 and 4 while no misfire felt. As soon as I run the engine over 1500 RPM the misfire data starts to show misfires on these...
September 26, 2008
2001 Jeep Grand Cherokee Laredo 4.0L Poor Idle Quality, MIL Lamp on VIN: 1J4GX48S51
P0300: Multiple Cylinder Misfire Detected. howdy folks, i have one i can't shake. 01 jeep cherokee 4.0 a/t. fuel pressure was at 65 psi, changed regulator and now at 50 psi as spec. engine repeatedly trips po300,301,302,303 at idle. engine runs perfect above idle, perfect fuel trim, perfect injector p...
September 26, 2008
2003 Chevrolet Suburban 1500 LS 5.3L Excessive Emissions, Misfire VIN: 3GNEC16T83
P0300: Multiple Cylinder Misfire Detected. Vehicle will start and run fine at first, watching short term and mis-fire, bank one goes crazy gradually increasing, and misfire data on cylinders one and three goes up. Pulse width average on bank one is almost double of bank two. Black smoke is emmitted. Re...
September 27, 2008
2000 Volkswagen Beetle GL 1.8L Idle surge VIN: 3VWCD21C1Y
P0300: Random multiple misfire. Hello, This VW is giving us fits (not a pretty sight). The car had a timing belt break a couple of years ago and the customer replaced the cylinder head. The car then developed a very rapid surge at idle between 750 and 900 RPM. They let the car sit for a cou...
September 29, 2008
2000 Buick LeSabre Custom 3.8L Misfire VIN: 1G4HP54K2Y
P0300: Engine Misfire Detected. Hello, I have a intermitten misfire only on start up when engine is cold only. Replace upper intake, smoke intake system no leaks found. Substitute good know parts like EGR, MAF, Ignition module. Swapped coil, plug, plug wire and injector from cyliner 6 to cyl...
September 30, 2008
2002 GMC Sierra 1500 SL 4.3L Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GTEC14WX2
P0300: Multiple Cylinder Misfire Detected. Thank you for taking the time to read this post. This truck started to have MIL on about a week ago, suddenly. Once MIL is displayed the shift points change and the fuel mileage drops dramatically. I did a complete tuneup last week. Cleaned injection system an...
September 30, 2008
2004 Saturn Ion-2 2.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G8AJ52F84
P0300: Random Misfire Detected. hi techs, this vehicle came to us after the owner took it to the dealer. vehicle has a very rough idle (misfiring). dealer told owner problem had to do with valves or springs, but vacuum looks good. Fuel psi= 57, the car runs great off idle, accel, and cruise....
September 30, 2008
1998 Ford F-150 Lariat 4.6L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire VIN: 1FTZX17W3W
P0300: random cylinder misfire. Good morning all iATN members.Have this ford f-150 with a bad running problem.It came in smoking out of the exaust-no power-the idle is constanly up and down-the gas smelled bad so we drained it,replace fuel filter and put in 7 gallons.I started with the basic...
September 02, 2008
1996 Chevrolet Camaro 3.8L Hesitation, Cuts out, Misfire VIN: 2G1FP22V9T
P0300: Multiple Engine Misfire Detected. car came in about a month ago for tune up customers request replace wires and plugs fuel filter car came back 2 days after tune up found cylinder 5 misfire i look over the last technicians work found that cylinder 5 spark plug was damage replace it ran great c...
September 03, 2008
2006 Ford E-150 4.6L Misfire, MIL Lamp on VIN: 1FTRE14WX6
P0300: random miss fire. ... will begin to miss fire and the check engine light will flash. At the time he brought it in there was no problem, I did find DTC"S P0300, P0305, and P0303, I replace the ignition coils on...
September 05, 2008
1997 Buick Regal LS 3.8L Misfire VIN: 2G4WB52K5V
P0300: Engine Misfire Detected. this vehical runs fine when driving normal but when you put it under a load such as tring to take off fast ,pass someone or going up a hill number one cylinder misfires.ive tried switching injectors,switching coils,new ignition module,new plugs and wires and p...
September 09, 2008
2004 Subaru Impreza WRX 2.0L Poor Idle Quality, Hesitation, Stall, Misfire, MIL Lamp on VIN: JF1GD29624
P0300: Multiple Cylinder Misfire Detected. vehicle has a rough idle and hesitation in acceleration. found 3.754 volts at front a/f sensor and rear o2 sensor has 0.075 volts and fluctuates very slowly - never above o.100 volts. short term fuel trim 25%.
September 10, 2008
2002 Toyota Tacoma DLX 3.4L Misfire, MIL Lamp on VIN: 5TEWN72N72
P0300: Multiple Cylinder Misfire Detected. Hi there I have this Tacoma that is being quite difficult. It has had this concern with setting cylinder #1 misfire codes for about 2 years now. The local Toyota dealer had it first and they sold him a full tune-up with plugs wires and injector cleaning. Pro...
September 13, 2008
1998 Buick LeSabre Custom 3.8L No Start, Misfire VIN: 1G4HP52K8W
P0300: Engine Misfire Detected. IATN Strikes again! Vehicle came as no start no run.Good spark.,Good fuel Pressure.;Had Code PO300.Pulled plugs all fouled.Replaced Plugs & Wires vehicle started with large cloud of smoke.I'm thinking that plugs were gas fouled cyl. loaded with fuel.Took c...
September 15, 2008
1997 Chevrolet K1500 4.3L Poor Idle Quality VIN: 1GCEK14WXV
P0300: Multiple Cylinder Misfire Detected. ... going on the highway this truck hesitates.the customer complained that the problem looks fuel related.i hooked up the scanner and and got p0300,egr code,and short or open for sending unit signal.when you look at the misfire data it shows the misfire counts...
September 15, 2008
2002 Audi A4 3.0L Misfire, MIL Lamp on VIN: WAULT68E52
P0300: Random/multiple misfire. OK, This one is weirding me out, so thought Id ask as it seems like something native AUDI/VW that Im unaware of. The description lists this as a MISFIRE concern, the MIL agrees, but I dont as of yet. The vehicle got the timing belt job, then redid belt for mil...
September 16, 2008
1997 Chevrolet K1500 4.3L Poor Idle Quality VIN: 1GCEK14WXV
P0300: Multiple Cylinder Misfire Detected. ... going on the highway this truck hesitates.the customer complained that the problem looks fuel related.i hooked up the scanner and and got p0300,egr code,and short or open for sending unit signal.when you look at the misfire data it shows the misfire counts...
September 16, 2008
2000 Dodge Intrepid 2.7L MIL Lamp on VIN: 2B3HD46R2Y
P0300: Multiple Cylinder Misfire Detected. ... use some help on this one. We are working on a 2000 Dodge Intrepid with a 2.7 fed. emisions engine. It keeps setting a P0300 with 302,304,305 pending. Vehicle has new plugs (Champion O.E.), no noticeable miss hot or cold...
September 16, 2008
2002 Hyundai Sonata 2.4L Misfire, MIL Lamp on VIN: KMHWF25S62
P0300: Multiple Misfire Detected. we thought timing belt was the main problem, however after returning the car to the owner, the same problem occured again with all codes returning but code p0340, we retested and replaced spark plugs, flushed injection system and throttle body, maf sensor. the...
September 16, 2008
2004 Nissan Altima SE 3.5L Poor Idle Quality, MIL Lamp on VIN: 1N4BL11D54
P0300: Multiple Misfire Detected. hey all,thanks in advance.have this nissan in here that had been at local dealer for diagnosis.dealer rec timing chains and guides for repair.vehicle brought to me.replaced all 3 timing chains and guides.vehicle has same problem.runs rough at idle sets codes p...
September 16, 2008
2000 Cadillac DeVille 4.6L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on, multiple codes VIN: 1G6KD54Y2Y
P0300: Engine Misfire Detected. i think it needs ckp sensors but wanted second opinion or more .
September 17, 2008
2001 Chevrolet Blazer LS 4.3L Misfire VIN: 1GNDT13W51
P0300: Multiple Cylinder Misfire Detected. ... used the help request so forgive me if I am missing any pertinant info. This Blazer came in with a MIL on and a P0300 stored. No noticable misfire presant but when monitoring misfire counter on scan tool it shows a bad miss on #2 cyl above 1400 rpm in neut...
September 18, 2008
2000 Dodge Intrepid 2.7L MIL Lamp on VIN: 2B3HD46R2Y
P0300: Multiple Cylinder Misfire Detected. ... use some help on this one. We are working on a 2000 Dodge Intrepid with a 2.7 fed. emisions engine. It keeps setting a P0300 with 302,304,305 pending. Vehicle has new plugs (Champion O.E.), no noticeable miss hot or cold...
September 18, 2008
1999 Infiniti QX4 3.3L Poor Idle Quality, Hesitation, MIL Lamp on VIN: JNRAR07Y7X
P0300: Multiple Misfire Detected. so we did 2-4-6 injectors remn cap wires rotor new plugs air gas smoke for leaks slight leak out of egr and inake snorkel i seal intake hose for now but still runs bad...any ideas
September 18, 2008
2003 Kia Rio Cinco 1.6L Poor Idle Quality, MIL Lamp on VIN: KNADC16533
P0300: Random Cylinder Misfire Detected. Good day people. I have this KIA Rio that idles very rough. MIL will come on and transmission will not down shift into passing gear when throttle pedal floored. When vehicle came in first time had codes for MAF sensor and system too lean. No reading out of MAF...
September 18, 2008
2002 Nissan Altima 2.5L Hesitation, Surge, Misfire VIN: 1N4AL11D62
P0300: Multiple Misfire Detected. This vehicle surges when idling in drive or reverse as soon as you let off the brake and begin to roll up to 5MPH. Also surges when cruising at 40 MPH and when you slow down from 5-0 MPH. There is a bulletin NTB01-074A which describes this similiar issue, bu...
September 18, 2008
2003 Kia Rio Cinco 1.6L Poor Idle Quality, MIL Lamp on VIN: KNADC16533
P0300: Random Cylinder Misfire Detected. Good day people. I have this KIA Rio that idles very rough. MIL will come on and transmission will not down shift into passing gear when throttle pedal floored. When vehicle came in first time had codes for MAF sensor and system too lean. No reading out of MAF...
September 19, 2008
2000 Nissan Sentra GXE 1.8L No Start, Poor Idle Quality, Cuts out, Stall, Misfire, MIL Lamp on VIN: 3N1CB51D4Y
P0300: Multiple Misfire Detected. when car does start-it is so lean, it turn the cat red in minutes--ran with cat disconnected--car runs the same--injectors and coils seem intermittent--rpm does not drop out--very limited data on modis-suspecting cam or crank sensor problem-but not much nissan...
September 21, 2008
1997 Chevrolet Astro 4.3L Poor Idle Quality, Misfire VIN: 1GNEL19W6V
P0300: Multiple Cylinder Misfire Detected. Vehicle came in running very poorly. Very rough idle with considerable power loss. Cust had tune-up and fuel sys flush done at another garage which did not help problem. Found slightly leaking EGR and replaced valve. Also found fuel pressure leak down and repl...
September 22, 2008
2004 Dodge Durango SLT 4.7L Misfire VIN: 1D4HB48N94
P0300: Multiple Misfire Detected. Thanks for taking time to help w/this mess. Have dead mifire concerns. Found cyl#3 only affected cylinder (no change if spark/fuel removed). Found the following: -Have injector pulses -Have coil pulses Coil very white/chalky. No change w/new. -Compression 120p...
September 22, 2008
1998 Honda Passport EX 3.2L Misfire, MIL Lamp on, po300 VIN: 4S6CM58W4W
P0300: Random Misfire Detected. Vehicle under load misfires on cyl 1,3,5 o2 on bank one reads 800mv or more. Not loosing ignition on scope while monitoring misfire counter on scanner.Pulse width stays normal but computer starts to lean pulse width on 1,3,5. Backpressure on exhaust at 1.5-2 l...
September 22, 2008
1996 Jaguar XJ6 4.0L Excessive Emissions, Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: SAJHX1743T
P0300: Random cylinder misfire. ... August. Found DTCs stored for knock sensor circuit fault, EGR insufficient flow and catalyst efficiency below threshold. Removed EGR valve and adapter plate. Cleaned EGR passages. Researched knock sensor code, found indication possibly related to EGR code....
September 22, 2008
2002 Buick LeSabre Custom 3.8L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1G4HP54K92
P0300: Multiple Engine Misfire Detected. Greetings. This 2002 Lesabre has a miss in it. Along with the miss is a rattle noise. Have checked spark plug(and tried new one with no luck), checked fuel pressure which is ok, checked injector flow--ok, checked for vacuum leaks(twice) and none found. Ohmed s...
September 24, 2008
2001 Cadillac Catera 3.0L No Start, Stall, Misfire
P0300: Multiple Cylinder Misfire Detected. This car has misfire on all 6 cylinders. Will do this cold, and if you play with the throttle and get it a little warm, it will run on its own. However, under a load it will still misfire. Have tried new coil packs for both engine banks. Scanner indicates the ...
September 25, 2008
2001 Chevrolet S10 4.3L Misfire VIN: 1GTCT19W11
P0300: Multiple Engine Misfire Detected. Hi guys, This truck is driving me crazy, I'm loosing my hair I got left. I am working on this truck for shown severe misfire on cylinder 1 and 4 while no misfire felt. As soon as I run the engine over 1500 RPM the misfire data starts to show misfires on these...
September 26, 2008
2001 Jeep Grand Cherokee Laredo 4.0L Poor Idle Quality, MIL Lamp on VIN: 1J4GX48S51
P0300: Multiple Cylinder Misfire Detected. howdy folks, i have one i can't shake. 01 jeep cherokee 4.0 a/t. fuel pressure was at 65 psi, changed regulator and now at 50 psi as spec. engine repeatedly trips po300,301,302,303 at idle. engine runs perfect above idle, perfect fuel trim, perfect injector p...
September 26, 2008
2003 Chevrolet Suburban 1500 LS 5.3L Excessive Emissions, Misfire VIN: 3GNEC16T83
P0300: Multiple Cylinder Misfire Detected. Vehicle will start and run fine at first, watching short term and mis-fire, bank one goes crazy gradually increasing, and misfire data on cylinders one and three goes up. Pulse width average on bank one is almost double of bank two. Black smoke is emmitted. Re...
September 27, 2008
2000 Volkswagen Beetle GL 1.8L Idle surge VIN: 3VWCD21C1Y
P0300: Random multiple misfire. Hello, This VW is giving us fits (not a pretty sight). The car had a timing belt break a couple of years ago and the customer replaced the cylinder head. The car then developed a very rapid surge at idle between 750 and 900 RPM. They let the car sit for a cou...
September 29, 2008
2000 Buick LeSabre Custom 3.8L Misfire VIN: 1G4HP54K2Y
P0300: Engine Misfire Detected. Hello, I have a intermitten misfire only on start up when engine is cold only. Replace upper intake, smoke intake system no leaks found. Substitute good know parts like EGR, MAF, Ignition module. Swapped coil, plug, plug wire and injector from cyliner 6 to cyl...
September 30, 2008
2002 GMC Sierra 1500 SL 4.3L Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GTEC14WX2
P0300: Multiple Cylinder Misfire Detected. Thank you for taking the time to read this post. This truck started to have MIL on about a week ago, suddenly. Once MIL is displayed the shift points change and the fuel mileage drops dramatically. I did a complete tuneup last week. Cleaned injection system an...
September 30, 2008
2004 Saturn Ion-2 2.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G8AJ52F84
P0300: Random Misfire Detected. hi techs, this vehicle came to us after the owner took it to the dealer. vehicle has a very rough idle (misfiring). dealer told owner problem had to do with valves or springs, but vacuum looks good. Fuel psi= 57, the car runs great off idle, accel, and cruise....
September 30, 2008