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P0300 Diagnostic Trouble Code Discussion for April 2013

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
2010 Buick LaCrosse CXL 3.0L MIL Lamp on VIN: 1G4GL5EG8A
P0300: missfire. Vehicle came in for Cat efficiency codes, Scan tested and road tested . when throttle is snapped while graphing o2 sensors the spike in the pattern seems to occur at the same time on pre and after cat sensors. At a recent snap on course it was stated there sho...
April 01, 2013
2007 Chevrolet Impala LT 3.5L Misfire
P0300: Multiple Engine Misfire Detected. Very slight miss on #4 . Changed plugs ,wires checked fuel pressure , vucum all very good . Mis does not start until engine runs for 30 to 40 seconds checked vacum leaks at manifold seems good cannot reach #4 injector with out disassembly of intake . We think ...
April 03, 2013
1999 GMC C1500 Suburban 5.7L Misfire VIN: 3GKEC16R1X
P0300: Multiple Cylinder Misfire Detected. ... after all the listed parts were replaced, fuel press, is in spec, short fuel trim is at 130 all the time at idle is this normal or high ,both banks, have checked for vac, leak dont find one, tried new air flow meter and map, no change, done the ckp sensor ...
April 03, 2013
1999 Chevrolet W3500 Tiltmaster W3S042 5.7L Misfire, MIL Lamp on VIN: 5CGCP41R2X
P0300: Multiple misfire. ... for MIL on and failed emissions test. Had code P0303. checked spark plugs, wires, dist cap and rotor. Cap and rotor burned, plugs eroded electrodes,I changed them all. Checked Cam offset-- it was at -43 degrees yet it ran good. Reset it to 0 degrees. Then ...
April 08, 2013
2003 Volkswagen Jetta GL 2.0L Misfire, MIL Lamp on VIN: 3VWRK69M23
P0300: VAG -16684 Random/Multiple Misfire. ... in with CEL on & sometimes Blinking. Rough Idle/Misfire, etc. Scanned for codes. retrieved DTC P0300 & P0304. During visual inspection was able to see Cylinder # 4 Ignition wire Arcing on the Cylinder Head. We repl...
April 08, 2013
2011 Buick Enclave CXL 3.6L Misfire, MIL Lamp on VIN: 5GAKRBED3B
i hope everyone has had a good season so far... i have a 3.6L Buick Enclave with random cylinder misfire and have found misfire history on cylinders 1, 3, and 5. I am not familiar with the direct injection or possible EGR system on this vehicle. With the low m...
April 09, 2013
1999 Chevrolet W3500 Tiltmaster W3S042 5.7L Misfire, MIL Lamp on VIN: 5CGCP41R2X
P0300: Multiple misfire. ... for MIL on and failed emissions test. Had code P0303. checked spark plugs, wires, dist cap and rotor. Cap and rotor burned, plugs eroded electrodes,I changed them all. Checked Cam offset-- it was at -43 degrees yet it ran good. Reset it to 0 degrees. Then ...
April 09, 2013
2005 Chevrolet Silverado 2500 HD 6.6L Stall, Misfire, MIL Lamp on VIN: 1GCHK232X5
P0300: Multiple Engine Misfire Detected. This Truck will run fine for about 5 miles then start running rough and die if you pump the primer it will start an go another 5 miles or so I ran the air leak test on the fuel supply side and cam to replace the injection pump I am a ford tech and do lots of w...
April 10, 2013
2005 Ford F-250 Super Duty FX4 5.4L Poor Idle Quality, Hesitation, Cuts out, Misfire VIN: 1FTNF21545
P0300: Random Misfire Detected. Customer brought vehicle in stating vehicle looses power intermittently. I disconnected camshaft solenoids and it does not make a difference. I watched the camshaft sensors on a lab scope and there patterns differ. I switched the camshaft sensors and I still g...
April 10, 2013
2004 Saturn Vue Red Line 3.5L Misfire, MIL Lamp on VIN: 5GZCZ63424
P0300: Cylinder 2 Misfire Detected. i have checked timing marks twice, checked valve adjustment,install denso iridium plugs, and still check engine light for misfire
April 10, 2013
2000 Chevrolet Express 3500 7.4L Misfire VIN: 1GBM7H1BXY
P0300: Multiple Cylinder Misfire Detected. ... This is actually a boom truck with a 460 in it. Will eventually set a P0300 code. Can definitely feel a misfire. When you do a power balance, all cylinders seem to effect the same. Has been to five different shops which have replaced plugs coils etc. Did a...
April 11, 2013
2003 Saturn Ion-2 2.2L Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: 1G8AJ52F13
P0300: Random Misfire Detected. Good evening to all This vehicle came to shop missing really bad.I hooked up modis and came up with misfire on 3 and large evap leak checked compression in all cylinders it is 175 lbs.,replaced coil pack (battleship),plugs,module,and coil pack boots.Disconnect...
April 13, 2013
1998 GMC K1500 Sierra SLE 5.7L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on, sometimes har start VIN: 3GKFK16R7W
P0300: Multiple Cylinder Misfire Detected. ... of time, this is my dads truck and its kicking our as*es! This problem is very intermittent, but happens 2 or so times a week. I will try and explain as best as i can. Vehicle initially came in with P0305, i found original very badly burnt cap and rotor al...
April 16, 2013
2001 GMC Yukon Denali 6.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GKEK63U81
P0300: Multiple Cylinder Misfire Detected. ... codes, p0171, p0174, p0300. Usually with these codes we test the intake gaskets, find vacuum leaks and replace the intake gaskets and knock sensors due to the corrosion and it takes care of all three trouble codes. We tested the intake gaskets for vacuum l...
April 16, 2013
1999 Jeep Grand Cherokee Laredo 4.0L Misfire, MIL Lamp on VIN: 1J4GW58S1X
P0300: Multiple Cylinder Misfire Detected. This Jeep has driven another shop nuts and now it`s my turn. I checked compression, tried a third set of plugs, swapped out the crank sensor and upstream o2`s to no avail. Pulled fuel rail and all injectors spray a good pattern. You start this up and 30 second...
April 16, 2013
2003 Audi Allroad Quattro 2.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: WA1YD64B93
P0300: random misfire. This audi came in a few months back with collided valves into pistons destroying the bottom end, we installed a used low mileage long block engine into it and It ran fine for a few days but noted when fully accelerated to the floor WOT under maximum boost and ...
April 17, 2013
2005 Nissan Titan LE 5.6L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1N6BA07A45
P0300: Multiple Misfire Detected. Hello fellow techs, I hope someone can help me out. I am working on this Titan that came in for a missfire. I performed the tune-up on it and notticed that every plug on bank 2 were soaked with fuel. When I started the vehicle the problem still exhisted. When ...
April 18, 2013
1996 Nissan Pathfinder LE 3.3L Cuts out, Stall VIN: JN8AR05Y0T
P0300: Multiple Misfire Detected. STUMPED IN VIRGINIA!I hava found a few minor problems like a metered air leak in intake hose-replaced.Worn out spark plugs-replaced.Coolant leak on throttle body-repaired and cleaned throttle body.Original problem was for stalling,ran the vehicle on and off fo...
April 19, 2013
2006 Ford F-150 XLT 5.4L Poor Idle Quality, Hesitation, MIL Lamp on VIN: 1FTPW14546
P0300: random multiple cylinder missfire. Vehicle came in on the tow truck because it lost power on the highway. Truck runs and drives fine under light acceleration. Under medium to heavy acceleration the truck just does not accelerate. Feels and sounds like a maf or converter problem. STFT 1 AND 2 AR...
April 20, 2013
2004 GMC Sonoma SLS 4.3L Misfire VIN: 1GTDT13X64
P0300: Multiple Cylinder Misfire Detected. ... Sonoma came to me misfiring and using lots of gas. Found bank 2 sensor 1 O2 was dropping out causing ECM to load up #2 side. Replaced O2, truck runs great. Thing is, check engine light starts flashing if you accelerate hard or once you get going over about...
April 20, 2013
1999 Jeep Grand Cherokee Laredo 4.0L Misfire, MIL Lamp on VIN: 1J4GW58S1X
P0300: Multiple Cylinder Misfire Detected. This Jeep has driven another shop nuts and now it`s my turn. I checked compression, tried a third set of plugs, swapped out the crank sensor and upstream o2`s to no avail. Pulled fuel rail and all injectors spray a good pattern. You start this up and 30 second...
April 20, 2013
2007 Saab 9-3 Aero 2.8L MIL Lamp on VIN: YS3FH71U27
P0300: Random Missfire. This is our first time on a 2.8 V6 with what appears to be a mechanical problem. It would appear that the code would be set by a timing chain problem. Has anyone seen this on an engine with 50K on it. In trying to decide how to work up estimates the labor guid...
April 22, 2013
2001 GMC Jimmy SLE 4.3L Misfire, MIL Lamp on VIN: 1GKDT13W61
P0300: Multiple Cylinder Misfire Detected. Truck runs fine you feel no misfire. It doesn't miss at idle at all on the counters. It misses on cylinders 1-5 above [...] in park(Cylinder # 4 misses almost every count & # 1 is about half as many. The other cylinders only have a few), but only after war...
April 24, 2013
2008 Jeep Grand Cherokee Laredo 4.7L Misfire VIN: 1J8HR48N68
P0300: Random Misfire. ... codes. Found flash and suggested customer get that taken care of before any further diag on those codes. All codes where history. Customer also complained of a stall condition. Could not duplicate stall. Customer wanted plugs for maint. Replaced the plugs ...
April 24, 2013
2006 Kia Sedona LX 3.8L Misfire VIN: KNDMB23316
P0300: Multiple Misfire Detected. This fine kia has a misfire under load engine light blinks feels like it wants to stall,shut key off and restart runs fine random misfire code misfire counters are all at zero,not sure where to go next any help .
April 24, 2013
2001 Chevrolet S10 4.3L Misfire VIN: 1GCDT19W81
P0300: Multiple Engine Misfire Detected. ... month ago missing really bad.After checking the codes I found P0300.I replaced the plugs-wires & crank sensor.When I took the distributor cap off to give it a look I found that it was full of brass shavings so I replaced the disttibutor also.I gave it ...
April 26, 2013
2000 Saturn LS1 2.2L Hard Cold Start VIN: 1G8JT52F9Y
P0300: Random Misfire Detected. ... We replaced the engine of this Saturn LS. We put a used engine in it. I test drove it and passed state inspection. No check engine light and it runs good. However, I found that at cold startup, the engine will not start. It will crank and crank, but not ...
April 29, 2013
2004 GMC Envoy XL SLE 4.2L Misfire, MIL Lamp on VIN: 1GKET16S04
P0300: Multiple Engine Misfire Detected. ... ran "like a tractor" had a lack of power and was running rough. Also they smelled raw fuel near the front of the vehicle. While this was happening the check engine light was flashing and continued to flash until she lifted off the throttle and wait...
April 30, 2013