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P0300 Diagnostic Trouble Code Discussion for February 2007

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
2001 Chevrolet Suburban 1500 5.3L Misfire VIN: 3GNNFK16TX
P0300: Multiple Cylinder Misfire Detected. ... a concern of a check engine light. The light had been on but is out at this time and has;nt been on since i've started working on it. Retrieved stored code p0300 (engine misfire detected) with no freeze frame data. There are no hard misfire codes for any p...
February 01, 2007
2001 Mazda MPV DX 2.5L Misfire, MIL Lamp on, cold VIN: JM3LW28Y61
P0300: Multiple Misfire Detected. this van will misfire on a cold or short soak re-start and last for approx 1 to 2 min and clear up like someone flicked a switch and run purrrfect...havnt been able to isolate cylinder or cylinders misfireing ...im going after the plugs in the a.m...any help i...
February 01, 2007
2002 Pontiac Grand Am SE1 2.2L No Start, Poor Idle Quality, Hesitation, Cuts out, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1G2NF52F22
P0300: Multiple Cylinder Misfire Detected. First had vehicle in on 11/22/06 for s.e.s. light, engine has no power, and runs very roughly. We found that cyl's #2 and #3 were dead (no spark). Diagnosed and replaced faulty ignition module and engine ran great. Vehicle returned for the exact same concern o...
February 02, 2007
2003 Hummer H2 6.0L Misfire, MIL Lamp on VIN: 5GRGN23U24
P0300: Multiple Cylinder Misfire Detected. This Hummer shows code P0300 and is accompanied by a slight misfire at idle. Misfire is constant and, according to MODIS scanner, misfire happens mostly on cylinder #4. We tested compression. All cyls. read roughly 150 psi. We did an injector balance test and ...
February 05, 2007
2004 Toyota Matrix 1.8L Misfire, MIL Lamp on VIN: 2T1KR32E14
P0300: Multiple Cylinder Misfire Detected. Problem: Intermittently!! After cold sit for several hours engine starts with misfire occuring, MIL sets with all misfire codes. Mil stays on vehicle runs fine after arm up period. HAs just noticed on startup idles around 2000rpm cold and fluctuates up and dow...
February 05, 2007
1999 Dodge Neon High Line 2.0L Poor Idle Quality, Misfire VIN: 3B3ES42Y7X
P0300: Multiple Cylinder Misfire Detected. Good day people. I might be missing something very basic here, but I am trying to find this oproblem without changing parts galore. The vehicle will start up fine, but idle poorly for the first few minutes and then smooth out. The TPS sensor seems within specs...
February 06, 2007
1998 Honda Accord LX 2.3L Misfire, MIL Lamp on VIN: 1HGCG5548W
P0300: Multiple Misfire Detected. Hello all, I have a Honda here I'm having some trouble with. The check engine light goes on and off intermittently, setting the misfire codes listed below. While driving the vehicle, you feel no evidence of 3 cylinders misfiring? I replaced the plugs because o...
February 06, 2007
2003 Hummer H2 6.0L Misfire, MIL Lamp on VIN: 5GRGN23U24
P0300: Multiple Cylinder Misfire Detected. This Hummer shows code P0300 and is accompanied by a slight misfire at idle. Misfire is constant and, according to MODIS scanner, misfire happens mostly on cylinder #4. We tested compression. All cyls. read roughly 150 psi. We did an injector balance test and ...
February 06, 2007
1996 Volvo 850 GLT 2.4L Poor Fuel Economy, MIL Lamp on VIN: YV1LS5547T
P0300: misfire 300/301/302/303/304/305/. car has come in , good customer, tested tps at sensor,tuned car up completely , tps sweep with modis shows perfect sweep no drop out or glitches , don't have capabilties to test at computer , sorry , checked all connections and seated computer , car left shop ...
February 06, 2007
2001 Chevrolet Cab & Chassis Silverado 3500 6.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GBJC34U21
... engine light on.Engine bucking under load & rough idle.LTFT's are over 20%.Scanned PCM with Genesys and retrieved P0171,P0174,P0300, & P0332. Road tested vehicle, engine bucked severely under load. Replaced extre...
February 08, 2007
1996 Lincoln Mark VIII Anniversary 4.6L Poor Idle Quality, Surge, Cuts out, Misfire, MIL Lamp on VIN: 1LNLM91V1T
P0300: Random misfire. Received vehicle with no power brakes, leaking suspension components, ran terrible, check engine light and oil leak. Replaced brake booster, got brakes engine ran fine and no check engine light. This car adjusts ride height at 65mph so road tested to check air...
February 08, 2007
1998 Chevrolet Blazer 4.3L Excessive Emissions, Misfire, MIL Lamp on VIN: 1GNDT13W9W
P0300: Multiple Cylinder Misfire Detected. Ok everyone this one is winning the battle against me.Vehicle came in with mil lamp on with codes po151 and po300.ck o2 sensors found bank 2 sewnsor 1 was at .4mv hot replaced sensor and it was reading ok untill it warmed up then it started to drop out to neve...
February 10, 2007
2004 GMC Savana 2500 6.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GTGG25U14
P0300: Multiple Cylinder Misfire Detected. Hello and help all in one sentence. This vehicle is part of a fleet here in Palm Harbor, Fl. Within a couple of minutes after starting from sitting all night, this engine will begin to misfire for 5-10 minutes then all of a sudden run smooth and normal. While ...
February 11, 2007
1998 Chevrolet Blazer 4.3L Excessive Emissions, Misfire, MIL Lamp on VIN: 1GNDT13W9W
P0300: Multiple Cylinder Misfire Detected. Ok everyone this one is winning the battle against me.Vehicle came in with mil lamp on with codes po151 and po300.ck o2 sensors found bank 2 sewnsor 1 was at .4mv hot replaced sensor and it was reading ok untill it warmed up then it started to drop out to neve...
February 12, 2007
2002 Chevrolet Blazer LS 4.3L Misfire VIN: 1CHCS1BW02
P0300: Multiple Cylinder Misfire Detected. while viewing misfire data and holding throttle at approx 1500 rpm, cyls # 1 and # 4, will show misfire. intt one or two other cyls # 3 or # 5 will show misfire, (but only one or two misfires) on a road test no misfire is felt. the pcm has the latest software....
February 12, 2007
1999 Mitsubishi Galant DE 2.4L Misfire VIN: 4A3AA36G9X
P0300: Random Misfire Detected. ... my head. Ive been chasing this intermittent P0300 for weeks now. Just last week i was able to reproduce it in the shop. I've found that this misfire is the ECM not firing 1 cyl or another. It stated at cyl #1 we pulled injector leads to find it. When the #...
February 12, 2007
2003 Toyota Corolla CE 1.8L MIL Lamp on VIN: 1NXBR32E83
P0300: Multiple Cylinder Misfire Detected. ... seemed like Toyota T.S.B. about these code fit my problem, Less than one week later they all came back. Freeze Frame data shows that P0300 happened while the vehicle was still cold. It seems like I have an intermittent misfir...
February 13, 2007
2004 Toyota Matrix 1.8L Misfire, MIL Lamp on VIN: 2T1KR32E14
P0300: Multiple Cylinder Misfire Detected. Problem: Intermittently!! After cold sit for several hours engine starts with misfire occuring, MIL sets with all misfire codes. Mil stays on vehicle runs fine after arm up period. HAs just noticed on startup idles around 2000rpm cold and fluctuates up and dow...
February 13, 2007
2004 Dodge Ram 2500 Truck ST 5.7L Poor Idle Quality, Stall, Misfire, MIL Lamp on, HARD START VIN: 1D7KU28D14
P0300: Multiple Cylinder Misfire. customer came in with engine missfire, stall complaint check engine light on. inspected and found missfire on #1,3, 2 and 4 cylinders. smoke tested- no leaks visible. replaced all plugs, fuel pressure test- ok. tested spark on coils-ok. compression test-ok. re...
February 14, 2007
2001 Chevrolet Express 1500 5.0L Misfire, MIL Lamp on VIN: 1GBFG15M51
P0300: Multiple Cylinder Misfire Detected. ... This Express van came in about 4 months ago with the starter mounting bolt holes cracked thru the centers. We replaced the engine with a new GM Engine, not rebuilt, but NEW. Since that time it has come back 4 times for the MIL on, each of those times it ha...
February 15, 2007
1997 Chevrolet Cavalier LS 2.2L Poor Idle Quality, Hesitation, Poor Fuel Economy, MIL Lamp on VIN: 1G1JF524XV
P0300: Multiple Engine Misfire Detected. missfire jumps from cylinder to cylinder at random .number one cylinder on monday,number 4 cylinder on tuesday.missfire is only at idle,off idle missfire goes away.disconnect exhaust and missfire quality changes,almost goes away.
February 16, 2007
1999 Chevrolet Blazer 4.3L Misfire, MIL Lamp on VIN: 1GNDT13W9X
P0300: Multiple Cylinder Misfire Detected. We have a S-Blazer here that will set a random misfire code intermittantly.Came in with mil on po300 with original ignition parts...replaced all, vehicle ran great.Came back a few days later same code.Freeze frame shows p0301 or p0306...different codes on diff...
February 16, 2007
2001 Chevrolet Express 1500 5.0L Misfire, MIL Lamp on VIN: 1GBFG15M51
P0300: Multiple Cylinder Misfire Detected. ... This Express van came in about 4 months ago with the starter mounting bolt holes cracked thru the centers. We replaced the engine with a new GM Engine, not rebuilt, but NEW. Since that time it has come back 4 times for the MIL on, each of those times it ha...
February 16, 2007
2001 Chevrolet Silverado 1500 5.3L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 2GCEK19TX1
P0300: Multiple Cylinder Misfire Detected. Hi I have a problem I have a miss fire at idle off idle seams fine miss fire counter counts up high for cly 4 5 But all clys show some miss firing most about 30 t0 50 but 4 & 5 are in the thousands first the plugs are new have tryed a new injector in # 4 c...
February 20, 2007
2002 Chevrolet Cavalier LS Sport 2.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G1JH52F72
P0300: Multiple Engine Misfire Detected. This Ecotech DOHC 2.2 lopes at idle and sets a random misfire code PO300.Misfire data shows all cylinders missing at idle.Short term fuel trim is fluctuating around 0 at idle.Long term trim is around -8.If you crack the throttle a little the car runs good.Cust...
February 21, 2007
2001 Mercury Sable LS Premium 3.0L Surge, Misfire, MIL Lamp on VIN: 1MEFM55S81
P0300: random misfire. ... customer had car towed to shop over weekend. Found P0300 stored. Mode 6 indicated about 9% misfire on cyls 4,5 & 6, no misfires on 1,2 & 3 and a total Type A & B misfire count of about 29%. No miss present a this time, no current misfires in mo...
February 21, 2007
1999 Chevrolet Silverado 1500 4.3L Surge, Misfire, MIL Lamp on VIN: 1GCEC14W2X
P0300: Multiple Cylinder Misfire Detected. This is the third Chev pu that we have seen with cam / crank syncronization problem. Distributor is not adjustable, nor has it been removed. Timing chain does not have excessive play, yet scan tool shows 12 degrees out on cam shaft retard. The first rig had th...
February 22, 2007
2002 Mazda Protege5 2.0L Misfire, MIL Lamp on VIN: JM1BJ24632
P0300: Multiple Misfire Detected. ... being looked at at another shop. They had pulled codes and found a p0300 random misfire. They also recomended replacing the coils.Becauce the first time the problem happened the customer was driving for five minutes then was accellerating to get on highway...
February 24, 2007
2000 Cadillac Catera 3.0L Misfire, MIL Lamp on VIN: W06VR548YR
P0300: Multiple Cylinder Misfire Detected. ... the service bay CEL light was flashing-retrieved codes P0300-P0301-P0303-P0305.Engine felt like had a misfire although not like all 3 cyls were out.Replaced co...
February 25, 2007
2000 Cadillac Catera 3.0L Misfire, MIL Lamp on VIN: W06VR548YR
P0300: Multiple Cylinder Misfire Detected. ... the service bay CEL light was flashing-retrieved codes P0300-P0301-P0303-P0305.Engine felt like had a misfire although not like all 3 cyls were out.Replaced co...
February 26, 2007
2002 Chevrolet Suburban 1500 LT 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GNFK16Z42
P0300: Multiple Cylinder Misfire Detected. Hi all this thing runs bad. Most of the misfires are on 1 and 3 but all have some in the history. Fuel trim is way out there -31short and -15 long both banks. Blows black smoke and all plugs are black. The fuel pressure is about 50psi. The fuel pressure regula...
February 26, 2007
1998 Dodge Stratus 2.4L Excessive Emissions, Poor Idle Quality, Surge, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1B3EJ46X5W
P0300: Multiple Cylinder Misfire Detected. Cust. brought car after repair attempt by another mech.He replaced timing belt,but did not fix problem.Engine starts and sometimes stalls.Restarts and surges at idle.Does this from first start even in Open loop.Idle speed rolls up and down 650-750 rpm with a W...
February 26, 2007
1997 Chevrolet S10 LS 2.2L Misfire, MIL Lamp on VIN: 1GCCS1945V
P0300: Multiple Engine Misfire Detected. Only in the morning it will miss on #1 and #4 cyl. Checked spark. It has spark at the plug. Ohmed coils they are ok.Couldn't check inj. pulse because onse it warms up it runs fine. If anyone has any ideas please let me know. I will check inj. pulse in the mo...
February 27, 2007
2000 Chevrolet Tracker 2.0L Poor Idle Quality, Cuts out, Stall, Misfire, MIL Lamp on VIN: 2CNBE13C7Y
P0300: random cylinder misfire. ... machine was towed in Monday. Starts and run raggdy. Check engine light on and blinking. Scan computer and retrieved P0300 in codes and data and P0303, in freeze frame data. Remove #3 spark plug and found electrode missing along with tip and porceilien, mor...
February 27, 2007
2001 Ford Explorer Sport 4.0L Poor Idle Quality, Stall, MIL Lamp on VIN: 1FMYU70E51
P0300: Random cylinder misfire. ... Ford that we cannot seem to fix. We followed the post trail on here to fix it and none of the fixes have worked. Here are the symptoms. On a cold day during first start up the truck will idle erratically and stall. On second start up it will run better but...
February 27, 2007
1999 Mitsubishi Galant DE 2.4L Misfire VIN: 4A3AA36G9X
P0300: Random Misfire Detected. ... my head. Ive been chasing this intermittent P0300 for weeks now. Just last week i was able to reproduce it in the shop. I've found that this misfire is the ECM not firing 1 cyl or another. It stated at cyl #1 we pulled injector leads to find it. When the #...
February 27, 2007
2000 Toyota Tundra SR5 4.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 5TBBT4418Y
P0300: Multiple Cylinder Misfire Detected. Coils have been swapped, plugs swapped,injectors swapped with other cylinders. Problem remained on that cylinder. Suspect carbon build up on exhaust valves causing exhaust to be drawn in on intake stroke. Combustion chamber cleaner was put through system and s...
February 27, 2007
2001 Ford Explorer Sport 4.0L Poor Idle Quality, Stall, MIL Lamp on VIN: 1FMYU70E51
P0300: Random cylinder misfire. ... Ford that we cannot seem to fix. We followed the post trail on here to fix it and none of the fixes have worked. Here are the symptoms. On a cold day during first start up the truck will idle erratically and stall. On second start up it will run better but...
February 28, 2007
2003 Isuzu Rodeo S V6 3.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 4S2DM58W83
P0300: Multiple Cylinder Misfire Detected. ... dead misfire. plug, Coil have been replaced. Injector # 4 has proper resistence and is clicking while the vehicle is running. Code alternates between a P0300 and P0304. No other codes are present. When the vehicle is run at above 1500RPM the light flashes....
February 28, 2007
1995 Toyota Tacoma DLX 3.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: 4TAVN53F9S
P0300: Multiple Cylinder Misfire. This truck came from a car lot who traded it in so I know nothing about when the symptoms started or any repair history. The complaint is a misfire. It has a Check Engine light on with numerous codes. Having worked on these engines some in the past, I am aware...
February 28, 2007