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P0300 Diagnostic Trouble Code Discussion for December 2008

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
2006 Ford F-150 XLT 5.4L Poor Idle Quality, Cuts out, Misfire, MIL Lamp on VIN: 1FTPW14V36
P0300: multiple cylinder missfires. Truck came in with MIL illuminated, rough run. codes revealed misfires detected on start-up and specific cylinders 1, 3, 4, and 7. performed preliminary misfire diagnostics found no active faults in primary or secondary ingnition. checked fuel system for restr...
December 01, 2008
1998 Chevrolet Camaro Z28 5.7L MIL Lamp on VIN: 2G1FP22G4W
P0300: Multiple Engine Misfire Detected. ck. engine light flashes at cruise or under load sets misfires on #1 &#6 cylinders when light flashes only. engine runs good with no misfires felt when driving. have checked all powers & grounds at pcm & removed all grounds at engine, cleaned paint...
December 03, 2008
1998 Chrysler Sebring JXi 2.5L Misfire, MIL Lamp on VIN: 3C3EL55H2W
P0300: Multiple Cylinder Misfire Detected. First time post for me, I have a Chrysler here that counts misfires on #3, #6 Cylinders on the scan tool as soon as you load it, but there it is not misfiring, you can not feel it and nothing shows up on the scope, I originally replaced the crank sensor for a ...
December 03, 2008
2002 Chevrolet Astro LS 4.3L Misfire, MIL Lamp on VIN: 1GNEL19X82
P0300: Multiple Cylinder Misfire Detected. ... Truck came in for intermittent ruff running and check engine light. I scanned and found p0300. Misfire history showed miss on 1,5, and 6 with 6 being the worst buy far (15,356 misfires recorded). Pulled #6 and found some ash colored deposits on electrode a...
December 04, 2008
2003 Chrysler Concorde LXi 3.5L Misfire, MIL Lamp on VIN: 2C3HD36MX3
P0300: Multiple Cylinder Misfire Detected. I did a compression test and it has 120-110 on the cyls. affected. no fuel pressure drop as if we had an leaky injector and smoked the car for vac leaks. I thought they had problems with the timing belts being off a tooth and causing a miss fire but do not see...
December 04, 2008
2000 Pontiac Grand Am SE 2.4L Poor Idle Quality, Misfire, Poor Fuel Economy VIN: 1G2NF52T6Y
P0300: Multiple Cylinder Misfire Detected. Car is running very rough , with a idle that is surging or running up and down. Also running very rich. Scanner shows all 4 cyl are missfiring. Found broken vacuum hose to map,dirty throtle body , and two quarts low on oil. Remedied all these items, and also c...
December 04, 2008
2001 Pontiac Grand Am SE 2.4L Misfire, MIL Lamp on VIN: 1G2NF52T11
P0300: Multiple Cylinder Misfire Detected. ... belonging to one of our auction driverís. Sure Iíll take a look at it. For some reason driveability on GM vehicles is humbling. Vehicle has a constant erratic miss that is most noticeable at idle, still there on light to moderate acceleration and not real...
December 04, 2008
2003 Ford Expedition Eddie Bauer 4.6L Excessive Emissions, Misfire, MIL Lamp on VIN: 1FMRU17W13
Well, got this expedition in couple days ago. All the codes listed above were present. Engine skipping, low power. Scan PID's showed Bank 1 running very rich- LTFT- -25%, Bank 2 running lean- LTFT- +15% to +25%. Vacuum gauge shows a steady 18in. Fuel pressure ...
December 05, 2008
2001 GMC Savana 2500 5.0L Excessive Emissions, Misfire, MIL Lamp on VIN: 1GTFG25M11
P0300: Multiple Cylinder Misfire Detected. i am working on 2001 gmc 2500 van with 5.0 engine.check engine light was on po200 and po300 codes were store in ecm and engine was running very rich.we replaced the fuel injectors as an assembly.engine ran fine for 1000 mile and came back with same problem aga...
December 05, 2008
2006 GMC Envoy SLE 4.2L No Start, Misfire, MIL Lamp on VIN: 534811GKDT
P0300: Multiple Engine Misfire Detected. I was going to clean the injectors on my sons truck and we decided to pull the fuel pump relay to shut the pump off.Must have caused something to go wrong because the truck wouldn't turn over at all(prior to this there was no problems at all).Put the relay bac...
December 05, 2008
2000 Toyota Tacoma Pre Runner 2.7L No Start, Cuts out, Stall, MIL Lamp on VIN: 4TASM92NXY
P0300: Multiple Cylinder Misfire Detected. This truck will crank over and run for about 3 seconds then die. If you cycle the ignition switch it will do the same thing. This is a California Emmisions vehicle and I have the codes mentioned above. We have tried 3 coils swapped to different positions, ECU,...
December 05, 2008
2002 Chevrolet Express 2500 LS 5.7L Excessive Emissions, Misfire, MIL Lamp on VIN: 1GAGG25RX2
P0300: Multiple Cylinder Misfire Detected. Customer brought in van, which is part of a fleet for driving seniors and handicapped around town. Said van is using some oil. (since we changed it 2000 miles ago it supposedly has used 4 1/2 qts.) No external leaks. Also he said check engine light flashes whe...
December 08, 2008
1996 Volkswagen Jetta GL 2.0L No Start VIN: 3VWRA81H4T
P0300: Multiple cyl misfire. Greetings! This VW was towed in after it stalled on the highway. The customer and a friend found the coil arced through the tower and installed a new coil w/ ignitor (aftermarket part). Still wouldn't start so they towed it to us. Had 2 codes in memory- Multip...
December 09, 2008
2006 Cadillac SRX 3.6L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GYEE63706
P0300: Engine Misfire Detected. this vehicle was in a front end collision - came from body shop - cam sensor and actuator readings ok at cold start up - as it reachs operating temp misfire and mil - checked wiring ok - using tech 2 with candi module for diag - any help would be appreciated
December 10, 2008
1998 Chevrolet Blazer 4.3L Poor Idle Quality, Hesitation, Surge, Stall, Misfire, MIL Lamp on VIN: 1GNCT18W4W
P0300: Multiple Cylinder Misfire Detected. i have a 98 blazer with cel light on custemr complant was it runs ruff i tested for the injectors and found that # 2 and 5 did not afect the way it ran so i replaced the injector sistem with the new and inproved ones from deler did not help replaced cap after ...
December 10, 2008
1996 Dodge Dakota 3.9L MIL Lamp on VIN: 1B7GL23X1T
P0300: Multiple Cylinder Misfire Detected. Hi folks, Customer has no complaint about engine performance. The MIL won't stay off. After clearing codes the MIL will come on after a day or so, setting codes PO300 Thru PO306. I noticed fuel pressure on the low side, so I replaced the fuel pump assembly w...
December 10, 2008
1998 Chevrolet Blazer 4.3L Poor Idle Quality, Hesitation, Surge, Stall, Misfire, MIL Lamp on VIN: 1GNCT18W4W
P0300: Multiple Cylinder Misfire Detected. i have a 98 blazer with cel light on custemr complant was it runs ruff i tested for the injectors and found that # 2 and 5 did not afect the way it ran so i replaced the injector sistem with the new and inproved ones from deler did not help replaced cap after ...
December 11, 2008
2004 Chevrolet Silverado 1500 4.8L Misfire, MIL Lamp on VIN: 1GCEC14V44
P0300: Multiple Cylinder Misfire Detected. vehicle came in for mil lamp on dtc p0300 stored, and mil flashing. tech 2 misfire graphic show misfire on cyl #s 1 and 6. checked plugs,they were okay. changed positions with cyl #6 to cyl #4 and from cyl #1 to cyl #3. still had problem. changed wires next fr...
December 11, 2008
2000 Lexus ES300 3.0L Surge, Misfire VIN: JT8BF28G11
P0300: Multiple Cylinder Misfire Detected. Afternoon Tech's . I have this 2000 lexus ES300 that has low power. Checked Code's,noticed that the misfire code's are on the same bank as the 02 sensor code's. lab scope ignition no problem found on ign system. Test a/f sensor found a.f sensor on b1 stuck a t...
December 12, 2008
2000 Lexus ES300 3.0L Surge, Misfire VIN: JT8BF28G11
P0300: Multiple Cylinder Misfire Detected. Afternoon Tech's . I have this 2000 lexus ES300 that has low power. Checked Code's,noticed that the misfire code's are on the same bank as the 02 sensor code's. lab scope ignition no problem found on ign system. Test a/f sensor found a.f sensor on b1 stuck a t...
December 14, 2008
2000 Audi S4 2.7L Misfire VIN: WAUDD68D4Y
P0300: random. hi again here i am beating my head against a wall for other peoples gain again, this audi came in running poorly, underheating, check engine light on, towed in, code interrogation found codes in repair history check with smoke machine found vacuum leaks at pcv...
December 15, 2008
1999 Cadillac DeVille 4.6L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GEEH90YXX
P0300: Engine Misfire Detected. Any Cadillac guru! I need your help... 99 Cadillac Deville 4.6 liter. Will not pass emissions due to miss fire. Vehicle came in with codes up the ying yang. Everything that has been has help but not there yet. Compression check good. 135 is the compression....
December 15, 2008
2002 Chevrolet Silverado 1500 5.3L No Start, Cuts out, Stall, Misfire, MIL Lamp on VIN: 2GTEC19T32
P0300: Multiple Cylinder Misfire Detected. Truck was towed in for a no start, had no fire or power to the fuel pump. We scanned and found crank sensor code. While we were testing vehicle it started for no reason. Ran perfect during extended test drive. We replace crank sensor and pigtail. Gave vehicle ...
December 16, 2008
2000 Jaguar XJ8 L 4.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: SAJDA23C6Y
This fine automobile limped into our shop running poorly. Pulled codes and checked fuel pressure, fuel quality, compression test yielded 2 cylinders that were low but not 0. I read through the posts about the timing chain tensioners and the secondary chains br...
December 16, 2008
2002 Saturn Vue 3.0L Hesitation, Surge, Stall, Misfire, MIL Lamp on VIN: 5GZCZ63B02
P0300: Random Misfire Detected. still barely runs at idle, play with gas pedal and it takes off after back firing a few times. then it dies. then you have to do it all over again. when it revs up its like a runaway. you have very little control over rpm.
December 16, 2008
2000 Audi S4 2.7L Misfire VIN: WAUDD68D4Y
P0300: random. hi again here i am beating my head against a wall for other peoples gain again, this audi came in running poorly, underheating, check engine light on, towed in, code interrogation found codes in repair history check with smoke machine found vacuum leaks at pcv...
December 17, 2008
1996 Chevrolet Camaro 3.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2G1FP22KXV
P0300: Multiple Engine Misfire Detected. hello to all techs out there. i got this camaro that is driving me crazy. it had a new engine put in a year ago.and,the customer let it sit up till now beacuse the fuel pump was bad. so last week we dropped the tank and cleaned it and replaced the pump. it sta...
December 18, 2008
2000 Lincoln Continental 4.6L Excessive Emissions, Poor Idle Quality, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1LNHM97V7Y
P0300: misefire all cylinders. car came to up on tow truck,customer stated the car lost power,check engine light came on and bellowing smoke from tail pipe,white smoke and very strong smell of gas. we checked car and found coils contaimeted with water and shorting out. replaced all 8 coils ...
December 18, 2008
1996 Ford Taurus GL 3.0L Misfire, MIL Lamp on VIN: 1FALP52U1T
P0300: multible miss fire. ... tarus that lost power and stalled, was towed in at six oclock quitting time, any way the car started and ran fine scanned for codes and found p0300 i test drove car and it was fine until about 15 miles into drive then it started to loose power, but the fue...
December 19, 2008
2001 GMC Yukon XL 1500 SLT 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GKFK16T71
P0300: Multiple Cylinder Misfire Detected. Hopefully one of you fine folks can shed some light on this Subdivision thats handing me my a@@! I put the fuel pump in back in April when it came in as a no start. At that time we also cleaned the MAF, T.B. and put plugs in it since they were fairly worn. Two...
December 19, 2008
2006 Saturn Vue 3.5L Misfire, MIL Lamp on VIN: 5GZCZ63406
P0300: Cylinder 2 Misfire Detected. Hi guys, This is my first help request, and boy do I need it! I'm working on a '06 Saturn Vue with the Honda 3.5L v-6 that's got misfires at idle only on cylinders 2 and 3. Engine runs strong and does not misfire off idle. In addition to the tests listed, I've...
December 19, 2008
2004 Chevrolet Trailblazer LS 4.2L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GNDT13S84
P0300: Multiple Engine Misfire Detected. Missed out bad and was steaming like a head gasket but smelled like raw fuel and missed bad and was running hotter than normal. Suspecting a bad injector brought tools to diagnose but now the fault has disappeared. I was wondering if anyone had ever had one of...
December 20, 2008
2006 Saturn Vue 3.5L Misfire, MIL Lamp on VIN: 5GZCZ63406
P0300: Cylinder 2 Misfire Detected. Hi guys, This is my first help request, and boy do I need it! I'm working on a '06 Saturn Vue with the Honda 3.5L v-6 that's got misfires at idle only on cylinders 2 and 3. Engine runs strong and does not misfire off idle. In addition to the tests listed, I've...
December 20, 2008
2003 Dodge Stratus R/T 3.0L No Start VIN: 4B3AG52H93
P0300: Multiple Cylinder Misfire Detected. Got this 2003 Dodge Stratus 3.0 V6 towed in over the weekend for a no-start condition. We discovered a no-spark condition. The car has crank signal while cranking, injector pulse, and the plugs are wet with gas. Went to the distributor and found a nasty lookin...
December 22, 2008
2001 Volkswagen Beetle GLX 1.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: 3VWDD21C71
... here, just looking for some confirmation from some of the Euro-car guys. This Beetle came in with a customer complaint of rough idle. Had a pending p0171 code which became a hard code on the test drive. Found that big y-shaped vacuum tube on the back of th...
December 24, 2008
1998 Chevrolet Astro 4.3L Misfire VIN: 1GCDM19W7W
P0300: Multiple Cylinder Misfire Detected. hello need some help here. this one is got me thinking im crazy. 1998 chevy astro van 4.3 motor. came in with service light on and running rough. we have a po300 cylinder misfire. check with modis and it is on [...].did compression test it turned out 150lbs. l...
December 29, 2008
2006 Chevrolet Colorado LT 2.8L Misfire, MIL Lamp on VIN: 1GCDT14896
P0300: Engine Misfire Detected. This is a rural mail carrier truck. On first visit for PO300 I replaced spark plugs and monitored misfires with Tech 2 on the road, all ok. Next day I found the complaint for misfire is at idle speed. When you go down the road the misfire is not present. Mostl...
December 30, 2008
1998 Mercedes-Benz ML320 3.2L Misfire VIN: EOWAO44855
P0300: . Hello every one This car came in with missfire on one side of eng,on cyl number 4,5,a and 6,checked it found bad spark plugs,replaced spark plugs and wires,still miss fire all three cyls,checked fuel injector all ohm as is should(16 ohm)it has injetor pulls,it...
December 31, 2008