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P0300 Diagnostic Trouble Code Discussion for September 2007

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
1999 Cadillac Escalade 5.7L Hesitation, Misfire, Poor Fuel Economy VIN: 1GYEK13R1X
P0300: Multiple Cylinder Misfire Detected. vehicle hessitates after hard acelaration and vehicle begins to cruise. fuel presseure steady at 60 psi . and missfire monitors show #5 miss firing also #6&7 problem doesnt always occure i disconnected egr problem a little better but still there.
September 01, 2007
2002 Mercedes-Benz ML320 3.2L MIL Lamp on VIN: 4JGAB54E52
P0300: Random Misfire. ... 3, 5, 6) and running very rough. I have seen this before, cause bad wires and plugs. Replaced and vehicle runs great, but every now and the it will stumble and give the P0300, P0304, P0306 codes. I have check connections,...
September 05, 2007
1999 Chevrolet Astro 4.3L Poor Idle Quality, Hesitation, Stall, Misfire, MIL Lamp on VIN: 1GNEL19W5B
P0300: Multiple Cylinder Misfire Detected. Help: I have a difficult one for you guys...maybe.My Customer bought this van and brought it to me because it misses once it gets hot.When you first start it , it runs great.Once it has run for an hour or so ,it delevopes a miss in # 5 cylinder...when you load...
September 06, 2007
2001 Chevrolet Silverado 1500 4.8L Misfire, MIL Lamp on VIN: 2GCEC19V41
P0300: Multiple Cylinder Misfire Detected. Hello techs, the customer says the CEL light started flashing a couple of days ago. I found code Po300 random misfire. Just a little more quick history before I go on. The engine became an oil burner @ 90,000kms(not sure why) and the customer was complaining o...
September 06, 2007
1998 Pontiac Grand Am SE 2.4L Cuts out, Misfire VIN: 1G2NE12TXW
P0300: Multiple Cylinder Misfire Detected. The vehicle ran with no problems for three weeks after the work at the previous shop. Initially died, restarted and ran fine for about 3 more days. The car the died, restarted but ran poorly and was limped home and towed to our shop. Only code is a PO300 multi...
September 07, 2007
2003 Chevrolet Suburban 1500 LT 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GNEC16Z33
P0300: Multiple Cylinder Misfire Detected. ... to give a helping hand. I have this Suburban that all of a sudden started running rough. Scannned for codes only p0300. Misfire counter shows #8 constant misfire and #7 misfire at idle. Checked plugs and wires looked OK but swapped with different cyl. Prob...
September 08, 2007
2004 Chevrolet Silverado 1500 4.8L Poor Idle Quality, Misfire, 4 cylinders dead VIN: 1GCEC19V04
P0300: Multiple Cylinder Misfire Detected. ... time, Truck starts up (hot or cold), idles 5 to 10 minutes and will over a course of 15 to 20 seconds slowly lose all 4 cylinders on right hand bank (2,4,6,8). All Ign coils are firing all spark plugs, All Injectors are suppling fuel into all cylinders, an...
September 09, 2007
1998 Chevrolet Venture 3.4L Misfire, MIL Lamp on VIN: 1GNDX03E2W
P0300: Multiple Cylinder Misfire Detected. ... about 2.5 miles car started skipping, check engine lamp came on and also stared flashing at times. scanned and found above codes. pid on scan tool inj 2 circut stuck low did flash to yes while skipping. i've come down to injector shorting intermittantly, w...
September 10, 2007
2001 Chevrolet Silverado 1500 4.8L Misfire, MIL Lamp on VIN: 2GCEC19V41
P0300: Multiple Cylinder Misfire Detected. Hello techs, the customer says the CEL light started flashing a couple of days ago. I found code Po300 random misfire. Just a little more quick history before I go on. The engine became an oil burner @ 90,000kms(not sure why) and the customer was complaining o...
September 10, 2007
2003 Chevrolet Suburban 1500 LT 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GNEC16Z33
P0300: Multiple Cylinder Misfire Detected. ... to give a helping hand. I have this Suburban that all of a sudden started running rough. Scannned for codes only p0300. Misfire counter shows #8 constant misfire and #7 misfire at idle. Checked plugs and wires looked OK but swapped with different cyl. Prob...
September 10, 2007
1999 GMC Yukon Denali SLE 5.7L Stall, Misfire, MIL Lamp on, Stall at stops VIN: 1GKEK13R8X
P0300: Multiple Cylinder Misfire Detected. ... P1345 and P0300 appeared . They worked on it for more thant a month trying to get rid of these codes, stalling at stops, kickback on hot restart. Cam and crank sensors have been replaced by them. I found that distributor w...
September 10, 2007
1996 Chevrolet C1500 Cheyenne 5.7L Misfire VIN: 2GCEC19R3T
P0300: Multiple Cylinder Misfire Detected. The reason I replaced some of these components is this. Crank sensor tested bad with ohm meter, fuel pump would not hold pressure without pinching return line, spark plugs were corroded shut, plug wires were burned, and fuel pressure regulator was plugged at v...
September 11, 2007
2004 Honda Accord EX 2.4L Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1HGCM72654
P0300: Random Misfire Detected. ... battery and no fuel. Misfires were rampant until battery was changed and fuel added. The only codes that were held in memory were the P0300,301,302,303,and 304. This vehicle was being driven by a step child that basically ha...
September 11, 2007
2002 Saturn Vue 3.0L Hesitation, Misfire, MIL Lamp on VIN: 5GZCZ63B92
P0300: Random Misfire Detected. I am losing the battle so far with this Saturn Vue! First time in it had misfires on many cylinders, both banks, ran o.k., but I could feel a miss at idle occasionally. With all the miles I opted to replace plugs and do a compression check. While the plugs wer...
September 11, 2007
2000 Nissan Maxima GLE 3.0L Hesitation, Surge, Stall, Misfire, MIL Lamp on VIN: JN1CA31D2Y
P0300: Multiple Misfire Detected. This car came in with lack of power and back firing through exhaust and intake check for vaccum leaks and fuel pressure seems to be ok also checked spark plugs are double platnium, also disconnected cats no change
September 15, 2007
1999 Mercedes-Benz ML320 3.2L Hesitation, MIL Lamp on VIN: 4JGAB54E5X
P0300: Random multiple cyl misfireFreeze Data. Gentlemen this is a tuff one, this 99 Mercedes Benz ML320 has the check Eng light on.The owner complaint vehicle has no power. I took veh for test drive, accellerator feels like TPS is defective and when punch the accel to the floor the check eng light start ...
September 16, 2007
2001 GMC Sierra 1500 SL 4.3L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GTEC14W41
P0300: Multiple Cylinder Misfire Detected. CUST CAME IN WITH A P0300. DID MAJOR TUNE UP. STILL HAD MISFIRES ON B2. CHECKED FUEL PRESSURE, COMPRESSION, AND INJECTOR BALANCE, AND TIMING. ALL OK. REPLACED CAM SENSOR DO TO CORROSION IN DISTRIBUTOR. REPLACED POPPETS FOR TSB UPGRADE TO MPFI INJECTORS. RECORD...
September 17, 2007
2006 Honda Civic EX 1.8L Misfire VIN: 2HGEFG1133
P0300: Random Misfire Detected. i just did a short block, clutch and flywheel on this car and now i have a misfire in #1 & #4 cylinder. all the sensors are hooked up. i swapped the outside coils with the inside one's to see if the misfire would change cylinders but it didn't, i changed t...
September 18, 2007
1999 Pontiac Grand Am SE 2.4L Misfire, MIL Lamp on VIN: 1G2NES2T4X
P0300: Multiple Cylinder Misfire Detected. Hello everyone, I hope you can help me out with this one. I have a 99 grand am that has a constant misfire at idle, but smoothes out a higher rpm. My fuel trims are near 0 and a misfire counter shows constant misfires on cylinders 1 and 4. When I pulled the sp...
September 18, 2007
1997 Buick LeSabre Custom 3.8L Misfire, MIL Lamp on VIN: 1G4HP52K9V
P0300: Engine Misfire Detected. This car has the light on and the misfire counter shows #4 misfiring. i can barely feel a miss in engine. when it is of of idle, the counter does not show miss at all.noid flashes on #4 I suspect the injector driver because of the code but cannot pinpoint the ...
September 19, 2007
1999 GMC Yukon Denali SLE 5.7L Stall, Misfire, MIL Lamp on, Stall at stops VIN: 1GKEK13R8X
P0300: Multiple Cylinder Misfire Detected. ... P1345 and P0300 appeared . They worked on it for more thant a month trying to get rid of these codes, stalling at stops, kickback on hot restart. Cam and crank sensors have been replaced by them. I found that distributor w...
September 19, 2007
2005 Chevrolet Colorado Z85 2.8L Poor Idle Quality, Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 1GCCS19855
P0300: Engine Misfire Detected. This colorado came in missing on all 4 cyl. ,evenly, cant tell that one is worse than others.Power reduced message, and MIL on. I removed the cam phase solenoid and activated it, the pintle does move. It reads 0 on scanner. I am not familiar with this engine. ...
September 20, 2007
2006 Chevrolet Cobalt LS 2.2L Misfire, MIL Lamp on VIN: 1G1AK55F36
P0300: Multiple Engine Misfire Detected. ... has an intermittent miss on 4 with a p0300 code. i tested the injector and coil with a scope, looked good. i have also swapped injetors, plugs, coil boots and check for spark with a tester on each cylinder...not loosing spark and still missing on # 4 inter...
September 21, 2007
2003 Volkswagen Passat GLS 1.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: WVWPD63B93
P0300: Multiple misfire. Hello eveyone; I got a head scratcher for me. I am getting multiple misfire codes on all cylinders. The Idle is bad and gets worse as the car warms up. The MIL flashes on idle. Once you start driving it will stumble a little but straighten out and drive fine u...
September 21, 2007
1996 Chevrolet Blazer 4.3L Poor Idle Quality, Misfire VIN: IGNDT13W9T
P0300: Multiple Cylinder Misfire Detected. Hi all. Thaks in advance. I have this Blazer thaat was towed in as a no start. The fuel pump was bad, we replaced with Delco and new filter. It has a miss in it that the customer says was there before also. It is a light miss at idle, enough to show on the mis...
September 24, 2007
1999 Chrysler Town & Country (Van) LXi 3.8L Poor Fuel Economy, loss of power VIN: 1C4GT64L5X
P0300: Random misfire. This is another one of those odd ones. The van runs fine with light throttle but not so much with heavy acceleration. It doesn't bog as bad as a plugged exhaust usually does but does rev slower. I found my fuel trim staying at 0% and my O2's at .06 on one test...
September 24, 2007
1999 Isuzu Rodeo LS 3.2L Poor Idle Quality, Misfire VIN: 4S2CM58W1X
P0300: Multiple Cylinder Misfire Detected. ... cylinders not working. [...] P0203 P0205 and P0300. I checked injectors for resistance and all seems OK. 13.6-14 ohms on 1, 3, and 5. Also 2, 4, and 6 which are working fine have the same reading. Engine/cyl Compression is go...
September 24, 2007
2005 Chevrolet Express 3500 6.0L Misfire VIN: 1GBJG31U35
P0300: Multiple Cylinder Misfire Detected. ... Vehicle had new engine installed by us recently. After engine was installed, found misfire occuring on cylinders 5 and 8 in misfire graphic on tech-2. Did not see any misfires in misfire history at that time. Misfire could not be felt and seemed to improve...
September 25, 2007
1999 Chrysler Town & Country (Van) LXi 3.8L Poor Fuel Economy, loss of power VIN: 1C4GT64L5X
P0300: Random misfire. This is another one of those odd ones. The van runs fine with light throttle but not so much with heavy acceleration. It doesn't bog as bad as a plugged exhaust usually does but does rev slower. I found my fuel trim staying at 0% and my O2's at .06 on one test...
September 25, 2007
2000 Ford Excursion Limited 6.8L Misfire VIN: 1FMNU42S8Y
P0300: Random Misfire Detected. hello-need some ford tech help here-vehicle came in with misfire codes listed-with the mileage shown-thought changing the spark plugs and coil boots would fix it no problem-weve done alot of regular tuneups on these things-well it still had the same exact prob...
September 25, 2007
1996 Nissan Pathfinder LE 3.3L Misfire VIN: JN8AR05Y3T
P0300: Multiple Misfire Detected. Hi all! We have the above metioned Pathfinder in our shop. The truck has a hard multiple missfire above 2500rpm. My Snap On scanner on Gen. OBD does not want me to access mode $06 to determine individual cylinder missfire. My question, could a faulty knock sen...
September 25, 2007
2005 Chevrolet Colorado Z85 2.8L Poor Idle Quality, Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 1GCCS19855
P0300: Engine Misfire Detected. This colorado came in missing on all 4 cyl. ,evenly, cant tell that one is worse than others.Power reduced message, and MIL on. I removed the cam phase solenoid and activated it, the pintle does move. It reads 0 on scanner. I am not familiar with this engine. ...
September 26, 2007
2001 Saturn SC1 1.9L Misfire, MIL Lamp on VIN: 1G8ZN12801
P0300: Random Misfire Detected. thanks for reading this post I`m almost bald now. this saturn came in with the tops melted off #`s 1,2,3 pistons . replaced engine with used & now have po300 misfire code anytime engine is held over 4% throttle. misfire counters show #1 & #4 misfires.f...
September 26, 2007
2003 Hummer H2 6.0L Hesitation VIN: 5GRGN23U63
P0300: Multiple Cylinder Misfire Detected. ... After driving for 15 min or more and stopping for a short time, the truck cranks over for at least 1 minute before firing. Pressing throttle makes no difference. Truck displays 65psi pressure while cranking and holds pressure upon release. Most recently th...
September 27, 2007
2003 Volkswagen Passat GLS 1.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: WVWPD63B93
P0300: Multiple misfire. Hello eveyone; I got a head scratcher for me. I am getting multiple misfire codes on all cylinders. The Idle is bad and gets worse as the car warms up. The MIL flashes on idle. Once you start driving it will stumble a little but straighten out and drive fine u...
September 27, 2007
2001 Lincoln LS 3.9L Misfire VIN: 1LNHM87AX1
P0300: random misfire. thanks for the help in adance. this vehicle keeps developing misfires when it gets hot. we replaced all the plugs and one known bad coil. the misfires happen during accel but not as bad at wide open throttle. the affected cylinders keeps jumping around and is ...
September 28, 2007