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P0300 Diagnostic Trouble Code Discussion for October 2013

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
2000 Chevrolet Blazer LS 4.3L Poor Idle Quality, Cuts out, Misfire, MIL Lamp on VIN: 1GNDT13W6Y
P0300: Multiple Cylinder Misfire Detected. Hello fellow techs and thanks in advance for taking the time to read and help us, this vehicle came in with the typical intake gasket leak and cold start misfire. vehicle has 150k miles on it and never had a the MFI unit replaced, suspected faulty poppet. whe...
October 01, 2013
2006 Acura MDX 3.5L Misfire
P0300: Random Misfire Detected. Got this MDX in today with multiple misfire codes. You can feel this miss whether engine is hot or cold, all the time. I checked spark plugs and compression while I was at it. Plugs were marginal and compression for all cylinders was around 200 psi. I cleared ...
October 02, 2013
2000 Chevrolet Blazer LS 4.3L Poor Idle Quality, Cuts out, Misfire, MIL Lamp on VIN: 1GNDT13W6Y
P0300: Multiple Cylinder Misfire Detected. Hello fellow techs and thanks in advance for taking the time to read and help us, this vehicle came in with the typical intake gasket leak and cold start misfire. vehicle has 150k miles on it and never had a the MFI unit replaced, suspected faulty poppet. whe...
October 02, 2013
2000 Toyota 4Runner Limited 3.4L Misfire VIN: JT3HN87R3Y
P0300: Multiple Cylinder Misfire Detected. Attention Toyota Techs, mystery needs solving. This 4Runner came in with the complaint of a very intermittent misfire condition. The engine would be idling and suddenly run rough, when the customer steps on the gas she claims to hear a popping noise coming fr...
October 02, 2013
2008 Ford F-250 Super Duty XLT 6.8L Misfire VIN: 1FTSX21Y58
P0300: Random Missfire. Truck sets codes codes PO300 and PO316, there was a code for the trottle body out of range, removed and cleaned it. That code is no longer present. Removed spark plugs and checked, they were worn so I replaced them with motorcraft plugs. Code still came back s...
October 03, 2013
2006 Volkswagen Touareg 3.2L Misfire, MIL Lamp on, Pinging VIN: WVGZG77L26
P0300: Random Misfire. Vehicle will misfire on #5 cyl only when very warm and under full load. I can hear pinging also, when under full load. Fuel pressure stays above 4.2 BAR when problem occurs. I have switched plugs and coils, problem stays on #5 cyl. Fuel trim is OK(ST 1%,LT -4....
October 03, 2013
2004 Jaguar X-Type 3.0L Misfire, MIL Lamp on VIN: SAJEA51C74
P0300: Random misfire. The engine runs fine at idle and under load with plenty of power. I can not feel the misfires,the check engine light will start to flash and then go into limp mode. I have replaced cylinders 1 3 and 5 coils and plugs moved the injectors to differnt cylinders a...
October 04, 2013
2000 Chevrolet S10 4.3L Misfire, MIL Lamp on VIN: 1GCDT14W6Y
P0300: Multiple Engine Misfire Detected. ... for (p0304)for rough idle. I check and found plugs and wires old. Replace spark plug, wires, cap and rotor. After i replace, test drive; vehicle is running good. Customer had no complaint driving home. Two day later, customer comes back with check engine l...
October 07, 2013
2005 Chevrolet Silverado 2500 HD 6.6L Poor Idle Quality, Misfire, Poor Fuel Economy VIN: 1GCHK232X5
P0300: Multiple Engine Misfire Detected. This vehicle came to us after Chevrolet dealer changed filters and told customer "that is as good as it runs". Customer complains of knocking noise in engine up to approximately 1700 rpm, runs rough at idle and fuel mileage dropped from 16 mpg to 12 mp...
October 08, 2013
2001 Lincoln LS 3.9L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1LNHM87A01
P0300: Random Misfire. I'm getting a P0304, P0303, and P0300 stored in memory. The car runs rough at idle, Fuel Trims show bank 1 as -25% and bank 2 as +25%. I have replaced all spark plugs and #4 coil with no change. EGR Valve is functioning correctly with no leakage. No excessive ...
October 08, 2013
2003 Volkswagen Passat GL 2.8L Misfire cyl #3 VIN: WVWTH63B63
P0300: Random mult. Misfire. THIS 2.8L V6 HAD A CONSISTENT MISFIRE AT IDLE ON CYL#3. THE MISFIRE COUNTER JUST KEPT COUNTING UP ON THE VAG-COM AS THE ENGINE SAT IN THE SHOP BAY RUNNING AT IDLE. WE SWAPPED THE SPARK PLUGS, FUEL INJECTORS, CHECKED THE COMPRESSION AND THE FUEL PRESSURE, SMOKE...
October 08, 2013
1998 GMC Sonoma SLE 4.3L Cuts out VIN: 1GTCS19X7W
P0300: Multiple Engine Misfire Detected. car came in with a misfire problem. custumer had coil and module so we repalced those and made no differance. scoped cam sensor and found dropouts so replaced it then test drove and worked fine. next day upon startup truck runs like it did when it arrived. so ...
October 09, 2013
2008 Volkswagen Passat Komfort 2.0L Misfire, MIL Lamp on VIN: WVWAK73C58
P0300: random cylinder misfire. ... rough running problem, after first scan and misfire monitering we had cyl. 3 was dead, and intermittent codes for cyl. 1 and cyl. 4 misfires. after swapping plugs and coils around and a compression test we diagnosed faulty fuel injector. installed all new...
October 09, 2013
2005 Jeep Liberty Limited 3.7L No Start, Poor Idle Quality, Cuts out VIN: 1J4GL58K55
P0300: Multiple Misfire Detected. Runs off external source. Runs without external source for about 5 sec. Fuel pump does run. Customer stated it ran rough nearing his house and when he when out to start it later it would not start. I'm confused. Any help or test would be great. Thanks Al
October 11, 2013
2005 Kia Amanti 3.5L Poor Idle Quality, Misfire VIN: KNALD12415
P0300: Multiple Misfire Detected. ... slightly rough at idle. It almost feels like a vibration as opposed to a misfire, but that may not be the case. We recently replaced the plugs and wires (maintenance) and it ran fine thereafter for about 1 and 1/2 weeks before the MIL appeared (the custome...
October 11, 2013
2004 Toyota Sequoia SR5 4.7L Poor Idle Quality, Misfire VIN: 5TDBT44A44
P0300: Multiple Cylinder Misfire Detected. The customer towed this one in because they heard a loud noise and the vehicle began running rough. Codes were the misfire codes above. Further diag we found the timing belt/marks jumped 5 teeth on the bank 2 cylinder head. We then removed the timing belt to c...
October 16, 2013
2003 Mitsubishi Montero Sport LS 3.0L Misfire, MIL Lamp on VIN: JA4LS21H93
P0300: Random Misfire Detected. ... have seen this & could give me some advice. This truck came in with a complaint of mil lamp on & running bad. Scanned for codes came up with p0300. Started it up & ran fine. Took it on a couple of miles & still runs perfect. I pulled over &...
October 17, 2013
2005 Pontiac Grand Prix GTP 3.8L Misfire, MIL Lamp on VIN: 2G2WR52445
P0300: Multiple Engine Misfire Detected. This one is killing me. First are the known issues. The exhaust crossover is cracked, the boost control solenoid is bad. When started cold it runs fine. About a minute after entering closed loop cyls 1 and 3 begin to misfire. Engine is shaking and CKP relearn ...
October 17, 2013
2003 Chevrolet Silverado 2500 6.0L Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 1GCHK23U53
P0300: Multiple Engine Misfire Detected. ... running. Had code p0300 and p0101 for maf sensor. Checked signal was ok. Checked vacuum and had a plugged exhaust. Cut off the converters, and all were plugged (cut off all four) still would not run under load and at cruising viewing data with scan tool wh...
October 21, 2013
2012 Ford F-250 Super Duty King Ranch 6.2L MIL Lamp on VIN: 1FT7W2B68C
P0300: multiple misfire. This one is a favor scan for a guy that used to live in a camper next to my shop. It's a company truck that never pulls a trailer or hauls a load. Lots of highway time and a lot of idling time. The only freeze frame I could get out of my MODIS was for the P030...
October 21, 2013
2002 Volkswagen Jetta GL 2.0L Misfire VIN: 3VWRB69M72
P0300: Random Misfire. Car arrived with the listed codes stored. Also had a coolant temp code stored. Ran very poorly. Started by checking the basics. Had spark and injector pulse on all 4 holes. Plugs and wires were original, so we replaced them with OE parts. Also replaced the the...
October 21, 2013
2008 Chevrolet Silverado 1500 LT 5.3L Misfire
P0300: cyl miss fire. I have a miss fire in cly number 1 ran a comp test it was 150 when cranking over it was shooting gas out the comp.tester I did some reading on other post and found to have a lifter problem so we pulled the head off and replaced all 4 lifters on 1&7 had the...
October 22, 2013
2006 Lexus RX400h 3.3L Misfire, MIL Lamp on VIN: JTJHW31U16
P0300: Multiple Cylinder Misfire Detected. ... making a loud noise after making a panic/emergency stop and was towed in. Drove the car into the shop and heard what SOUNDED like and engine knock. Had a p0302 stored but could feel no dead miss. Determined the noise was coming from within transmission so ...
October 22, 2013
2008 Chevrolet Silverado 1500 LT 5.3L Misfire
P0300: cyl miss fire. I have a miss fire in cly number 1 ran a comp test it was 150 when cranking over it was shooting gas out the comp.tester I did some reading on other post and found to have a lifter problem so we pulled the head off and replaced all 4 lifters on 1&7 had the...
October 23, 2013
2006 Lexus RX400h 3.3L Misfire, MIL Lamp on VIN: JTJHW31U16
P0300: Multiple Cylinder Misfire Detected. ... making a loud noise after making a panic/emergency stop and was towed in. Drove the car into the shop and heard what SOUNDED like and engine knock. Had a p0302 stored but could feel no dead miss. Determined the noise was coming from within transmission so ...
October 23, 2013
2006 Chrysler 300 Touring 3.5L Excessive Emissions, Misfire VIN: 2C3KA53G26
P0300: Multiple Cylinder Misfire. vehicle came to my shop after being at two other shops. customer said he was sitting in traffic and vehicle began to run very poorly. no throttle response, bad misfire, but then the mis went away and he began to get throttle response again. after about fourty ...
October 29, 2013
2007 Saturn Outlook XE 3.6L Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: 5GZER13737
P0300: Engine Misfire Detected. hey every one thanks for any help.. vel. came in with a evap code p0496 pinpoint test showed bad canister purge valve...replace valve then is when the lean codes showed up..st trims at 25 to 30 maxed out...no vacume leaks found..checked air filter and found oi...
October 31, 2013