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P0300 Diagnostic Trouble Code Discussion for May 2015

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
2004 Chevrolet Tahoe LS 5.3L Excessive Emissions, Poor Idle Quality, Hesitation, Stall VIN: 1GNEK13Z74
P0300: Multiple Cylinder Misfire Detected. Vehicle will not idle and is burning rich. Fuel fouling plugs. Low vacuum. O2 Readings maxing out. b1s1 755 b1s2 829 b2s1 291 b2s2 885 A/F 14.1 SFT B1 -16 SFT B2 -33 RPM 2358 MAF (gm/Sec) 25.13 MAF (Hz) 4618 MAP 15.3 @ 1152 RPM B1S1 699 B1S2 868 B2S1 794 B2S...
May 01, 2015
2007 GMC Sierra 1500 WT 5.3L Misfire, MIL Lamp on VIN: 1GTEC14057
P0300: Multiple Cylinder Misfire Detected. ok I know this is crazy but this is a fleet vehicle and they want it fixed it only throws misfire codes at 5,000 rpm or more during hard accel and it shifts hard at that point also no misfires are felt only shown on tech 2 any ideas ??
May 04, 2015
2002 Bentley Arnage RL 6.7L Excessive Emissions, Poor Idle Quality, Misfire VIN: SCBLC31E72
P0300: random misfire. ... dealership for emission testing.Doing the diagnostics on it find that the gas cap is missing (code p0455) number 1 cyl will just stop firing.Shut the car off and then start it up again and is running fine.Switch coils and it sti...
May 05, 2015
2007 Mazda CX-7 Touring 2.3L Poor Idle Quality, Hesitation, MIL Lamp on VIN: JM3ER29307
P0300: Random Misfire Detected. ... turbo power however this could just be how they run, this is the first one I have driven. I am having a poor idle all the time but the p0300 code set on a cold start. I cleaned the MAF it helped the readings that are now 3.3gps at idle. The big thing I am ...
May 05, 2015
2007 Chevrolet Impala LTZ 3.9L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2G1WU58R07
P0300: Multiple Engine Misfire Detected. Vehicle was bought at auction so i dont have previous repair info. Car had multiple problems. The plastic gear in the throttle body was broke causing a limp mode condition. Replaced throttle body but still ran rough with ckp/cmp correlation codes. Found timing...
May 12, 2015
2005 Ford Taurus SEL 3.0L MIL Lamp on VIN: 1FAFP56U25
P0300: Random misfire. In about a week of driving vehicle turn on the check engine light on with a po 300 code, engine runs fine no complains customer is only worry about the check engine light on,due to emissions, please help me figure this out, customer states that in the morning ...
May 14, 2015
2004 Chevrolet Trailblazer EXT LT 5.3L Poor Idle Quality, Hesitation, Cuts out, Misfire, MIL Lamp on VIN: 1GNET16P74
P0300: misfire. truck came in with locked up motor we installed used one changed over intake with new gaskets changed over fuel system. durning warm up of truck noiticed it was miss firing. Installed scanner and found b1s1 at 0 to 13 b1s2 at 28 to 31 b2s1 at 900 to 932 b2s2 a...
May 15, 2015
2008 Kia Sedona LX 3.8L MIL Lamp on VIN: KNDMB23348
P0300: . Wife's car of course. Light came on while I was driving, started flashing. Got it back home, didn't have a scan tool, so took the neg cable off, started and light out. Came back on after about 8 miles of driving, same thing, lamp blinking. I did not feel any m...
May 16, 2015
2008 Kia Sedona LX 3.8L MIL Lamp on VIN: KNDMB23348
P0300: . Wife's car of course. Light came on while I was driving, started flashing. Got it back home, didn't have a scan tool, so took the neg cable off, started and light out. Came back on after about 8 miles of driving, same thing, lamp blinking. I did not feel any m...
May 17, 2015
2001 Mercedes-Benz S500 Guard 5.0L Misfire VIN: WDBNG75J11
P0300: Misfires. ... at least it thinks it does. Customer brought it in a month ago and said he heard a rattling noise from the console area and the check engine light came on and it started running rough. Little did I suspect it would still be with us a month later. He stopp...
May 20, 2015
2001 Oldsmobile Intrigue GX 3.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G3WH52H31
P0300: Multiple Cylinder Misfire Detected. Misfire on cylinder 1 when cold. Goes away when warmed up. Swapped coils, injector and spark plugs but misfire stays on cylinder 1. Vehicle gets hot when idling but is fine when driving. Cooling fans are working. Tested coolant for combustion gasses but passed...
May 20, 2015
2004 Chevrolet Aveo 1.6L Misfire VIN: KL1TD62644
P0300: Engine Misfire Detected. Owner brought because mil is on, flashing while driving, shop that done work has give up. On compression test got 135 all but number 3 with 125. With data stream can see timing at 4 with no advance. Also can hear timing belt whine. Pull covers and it looks as ...
May 21, 2015
2013 Ford F-150 STX 5.0L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire VIN: 1FTFX1EF7D
P0300: Misfire. ... stall. p0300, p0302, p0304, p0308 codes. Hard to start, need to feather pedal to start engine and build up rpm's. Once you get it to rev, it idles fine. Engine bogs when you try to accelerate. When I ran koer test, p0505 showed up but did not set code. Cle...
May 22, 2015
2008 Ford F-350 Super Duty XL 5.4L Hesitation, Cuts out VIN: 1FDSF30558
came from 2 other shops, that replaced 5 fuel pumps in a row never left the shop oem., bogs down, no power, hot under load . this is reading warm with no problem FRP at 40 psi, FP% 40 psi, FRP DSD 40%.readings under med, heavy load hot FRP 6psi, fp% 41 ,FRP DS...
May 27, 2015
2013 Nissan Murano SV 3.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: JN8AZ1MW6D
P0300: multiple cylinder misfire. ... came into dealer for rough run and mil on found vacuum leak at broken vacuum line under engine cover at a vacuum control solenoid and dtc's p0300 multiple cylinder misfire and p0171 system lean bank 1 i assumed replace sens...
May 27, 2015
2013 Nissan Murano SV 3.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: JN8AZ1MW6D
P0300: multiple cylinder misfire. ... came into dealer for rough run and mil on found vacuum leak at broken vacuum line under engine cover at a vacuum control solenoid and dtc's p0300 multiple cylinder misfire and p0171 system lean bank 1 i assumed replace sens...
May 28, 2015
2008 Ford F-350 Super Duty XL 5.4L Hesitation, Cuts out VIN: 1FDSF30558
came from 2 other shops, that replaced 5 fuel pumps in a row never left the shop oem., bogs down, no power, hot under load . this is reading warm with no problem FRP at 40 psi, FP% 40 psi, FRP DSD 40%.readings under med, heavy load hot FRP 6psi, fp% 41 ,FRP DS...
May 29, 2015
2003 Volkswagen Jetta GL 1.8L Poor Idle Quality, Hesitation, Stall, Misfire, MIL Lamp on VIN: 3VWRE69M73
P0300: Random multiple misfires. ... issue with an 03 Volkswagen Jetta 1.8t auto. The car started out with a few vacuum leaks and misfires like all these motors do, all leaks and running issues were fixed for a few months, then the vehicle came back with a MIL for a p0411 for the secondary ai...
May 31, 2015