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P0300 Diagnostic Trouble Code Discussion for October 2009

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
2002 Buick Rendezvous CX Plus 3.4L MIL Lamp on VIN: 3G5DB03E52
P0300: Engine Misfire Detected. This is long. Vehicle originally came in for int. ABS light and ABS activation at low speeds. Found both front sensors bad and replaced both hub ass. Cust. then wanted to fix check engine light. I forgot to write down the code numbers and check FF, but I do re...
October 01, 2009
2000 Chevrolet Silverado 2500 6.0L Misfire, MIL Lamp on VIN: 1GCGK29U4Y
P0300: Multiple Cylinder Misfire Detected. ok heres the problem, under cruise above 50 mph, this truck misfires like clockwork, light load cruise. customer had replaced plugs and wires, now with my modis i can tell the misfire history in #1 and #6 are the culprit misfire history counts around 4500 time...
October 03, 2009
2004 Chevrolet Silverado 2500 HD 6.0L Hesitation, Misfire, MIL Lamp on VIN: 1GCHK29U54
P0300: Multiple Engine Misfire Detected. checking out for a friend. just bought the truck. service engine soon light comes on and usually flashes when cruising on highway (60 - 70 mph) or under light acceleration. misfires gets worse under hard acceleration. in the shop everything checks out ok - no ...
October 03, 2009
1997 Buick Skylark Custom 2.4L Poor Idle Quality, Misfire VIN: 1GNJ52T2VC
P0300: Multiple Cylinder Misfire Detected. ... idle after driving this weekend, found code p0300 missfire so check plugs and coil packs, replace plugs due to wear. check vac and found 13" at hot idle. So I removed side panel to recheck my timing marks and they are what I see lined up with both alig...
October 05, 2009
1998 Dodge Ram 1500 Truck 3.9L Misfire, MIL Lamp on VIN: 1B7HC16X6W
P0300: Multiple Cylinder Misfire Detected. The engine runs fine under all other operating conditions but when put under a load, such as 3rd gear with cruising speed of 50mph, roughly 2400 rpm. the engine sets fault codes for cyl. 3&5 misfire. The cylinder heads have been replaced as well as the ple...
October 05, 2009
2003 GMC Yukon XL 1500 SLE 5.3L Misfire, MIL Lamp on VIN: 3GKEC16Z73
P0300: Multiple Cylinder Misfire Detected. ... GM Techs.All the right bank cylinders are miss firing .I found TSB 3056 in my ALLDATA , I swapped the O2 sensors position 1 it did not move the miss .The sparkplugs are black (like fuel enrichment problem). I have very good hot fire to all plugs. The only ...
October 05, 2009
2001 Infiniti QX4 3.5L Misfire, MIL Lamp on VIN: JNRDR07Y81
P0300: Multiple Misfire Detected. ... engine in this vehicle, and it now runs with a misfire that appears to be on cylinders number 1 and 3. We have a ckp fault code P1336 due to a chipped flywheel tooth caused by us during installation but while waiting for the part we are trying to diagnose ...
October 05, 2009
2003 Kia Sorento EX 3.5L Misfire, MIL Lamp on VIN: KNDJD73383
P0300: Multiple Misfire Detected. Thanks in advance for your help and response, this car came in with a slight miss and over heating. We ran a block test and found a blown head gasket. When we finished doing head gaskets car ran good but has intermittent missfire and check engine light comes o...
October 05, 2009
1998 Chevrolet Express 3500 5.7L Misfire VIN: 1GBJG31R8W
P0300: Multiple Cylinder Misfire Detected. has misfire that constantly changes cylinders.watching misfire graph on tech 2 scanner one or two cyl are miss firing at a time but keeps switching which cyl is good or bad.
October 06, 2009
1999 Chrysler 300M 3.5L MIL Lamp on VIN: 2C3HE66G6X
P0300: Multiple Cylinder Misfire Detected. Code P0300 Sets only when traveling on the freeway between 70-80mph at a slight decline. When you accelerate or travel up an incline, it will not miss fire. If it was'nt for the Check Engine light coming on, you would'nt think anything is wrong with this vehic...
October 06, 2009
2003 Dodge Neon SXT 2.0L Surge VIN: 1B3ES26C43
P0300: Multiple Cylinder Misfire Detected. after replacing bad spark plugs(gap over .080) coil code stays off. but the cmp code returned at cruising speed and what i noticed is the cam angle went from 3.5 degreese to 3.7 degrees when code set on freeze frame then back to 3.5 next frame. I am curious if...
October 06, 2009
1998 Ford F-150 4.6L Misfire, MIL Lamp on VIN: 1FTZX07W5W
P0300: Engine will miss intermittently and for only about 15 seconds. There is no rhyme or reason when it occurs. This truck will intermittently miss. Sometimes is will happen 15 minutes after you start driving other times it may take several days. The miss will only occur for about 15 seconds. You don't even have time to get under the hood and miss will go away. Not sure...
October 06, 2009
2005 Ford F-150 FX4 5.4L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FTPX14585
dear group , The F150 is very sad.This truck appears to have one or more injectors leaking and has fouled one or more plugs , huffing and puffing thick smoke that reeks of gasoline.I see the TSB 05-13-4 that describes this unit to a tee.I have read the stories...
October 06, 2009
2003 Kia Sorento EX 3.5L Misfire, MIL Lamp on VIN: KNDJD73383
P0300: Multiple Misfire Detected. Thanks in advance for your help and response, this car came in with a slight miss and over heating. We ran a block test and found a blown head gasket. When we finished doing head gaskets car ran good but has intermittent missfire and check engine light comes o...
October 06, 2009
1998 Ford F-150 4.6L Misfire, MIL Lamp on VIN: 1FTZX07W5W
P0300: Engine will miss intermittently and for only about 15 seconds. There is no rhyme or reason when it occurs. This truck will intermittently miss. Sometimes is will happen 15 minutes after you start driving other times it may take several days. The miss will only occur for about 15 seconds. You don't even have time to get under the hood and miss will go away. Not sure...
October 07, 2009
1998 Mercedes-Benz E320 4Matic 3.2L no power VIN: WDBJ82F3WX
P0300: misfire. this benz has a bad bog only cold replaced mass air flow 2 times with factory bosch one cleaned injector rail and injecters replaced fuel filter sometimes its so bad it will set a po300 also replaced both converters one was broken up inside the fuel pressure i...
October 07, 2009
2000 Saturn SL 1.9L Misfire, MIL Lamp on VIN: 1G8ZH5285Y
P0300: Random Misfire Detected. Need some advice guys. Had this saturn in with codes po410, po442, and po300. Found that po410 air pump code was setting light so tested and repaired, gave to customer and warned of possible light coming back on. Vehicle returns with codes 442 and 300. Tested ...
October 07, 2009
1996 Buick Roadmaster Collector's Edition 5.7L Misfire, MIL Lamp on VIN: 1G4BT52P2T
P0300: Multiple Engine Misfire Detected. misses on cyl # 4 continuosly backfires through exhaust instaled new cap ,rotor,wires,plugs twice still misses cyl 4. installed new injector no change compression 180 fuel pressure in spec vaccum excellent valve springs not broken rockers ok pushrods ok in ori...
October 08, 2009
2000 Dodge Grand Caravan 3.0L Misfire VIN: 2B4GP2433Y
P0300: Multiple Cylinder Misfire Detected. Customer's complaint was a misfire when cold. Miss goes away when engine warms up. Confirmed complaint and verified the significant misfire was only on Cyls #2 & #6. Checked front bank plugs, all worn .010" over, checked front bank injectors, all even ...
October 08, 2009
2001 Audi A6 Quattro 2.8L MIL Lamp on VIN: WAUEH64B21
P0300: missfire. ... rough idle and mil lamp on. We found p0300, p0304, p0305, p0306, p1347 and p1522 stored. Left bank timing chain tenisoner had failed. We replaced that along with the timing belt. The engine now runs smoothly and is quiet ...
October 11, 2009
2004 Nissan Maxima SL 3.5L Misfire VIN: 1N4BA41E85
P0300: Multiple Misfire Detected. HI NISSAN TECH YOUR HELP NEEDED,THIS VEHICLE HAS A Intermittently MISSFIRE,CHANGE COILS INJECTORS,NOTE 02 SENSOR READING FUNNY,B1-S1 2.90V--B2-S1 1.93V THE REAR SENSORS B2-S2 0.08V---B1-S2 0.00V.FUEL PRESSURE OK.
October 12, 2009
1997 Saab 900 SE 2.5L Hesitation, Cuts out, Misfire, Poor Fuel Economy VIN: YS3DF75NXV
P0300: multipule mi9ssfire. Vehicle is from Washington state customer replaced fuel pump 1 month ago vehicle drives rough cuts out and has heavy hesitation. Runs ok between idle and 1500 Rpm
October 12, 2009
2001 Audi A6 Quattro 2.8L MIL Lamp on VIN: WAUEH64B21
P0300: missfire. ... rough idle and mil lamp on. We found p0300, p0304, p0305, p0306, p1347 and p1522 stored. Left bank timing chain tenisoner had failed. We replaced that along with the timing belt. The engine now runs smoothly and is quiet ...
October 13, 2009
1998 Chevrolet C1500 Silverado 5.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GCEK19R3W
P0300: Multiple Cylinder Misfire Detected. Hello all you gm guys out there. I will start by saying I am not a gm guy. I own an import (german) repair shop. I am working on this truck for a friend. The vehicle came with a terrible misfire. All the ignition system looked old and worn. replaced Plugs,wire...
October 14, 2009
1998 Chevrolet C1500 Silverado 5.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GCEK19R3W
P0300: Multiple Cylinder Misfire Detected. Hello all you gm guys out there. I will start by saying I am not a gm guy. I own an import (german) repair shop. I am working on this truck for a friend. The vehicle came with a terrible misfire. All the ignition system looked old and worn. replaced Plugs,wire...
October 15, 2009
2001 GMC Savana 2500 5.0L Misfire, MIL Lamp on VIN: 1GTFG25M11
P0300: Multiple Cylinder Misfire Detected. Cyl 4 had the bulk of the missfires cyl 2 had the second most and there were several missfires on 3 and 7. I noticed the cyl 7 missfires seemed to increase on decel.
October 15, 2009
1996 Volkswagen Jetta GL 2.0L Poor Idle Quality, Misfire VIN: 3VWRA81HXT
P0300: random miss. MIL will illuminate for misfire codes on cyl's 2 & 3, with very intermittent rough idle noted. The customer had complained of poor running on the freeway at times but I haven't experienced it. It does seem to have a slight "bump" in the idle most o...
October 15, 2009
2006 Volkswagen Passat 2.0T 2.0L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on, Coolant on coil VIN: WVWEK73C06
P0300: Cylinder Misfire Detected. Pulled cylinder one plug to swap with another cylinder, trying to isolated the miss to the coil. Found bottom third of coil wet with coolant. Coolant seems to have risen to a high enough level to completely submerge spark plug. However, the coolant was not the...
October 16, 2009
2006 Audi A4 Quattro Avant 2.0L Hesitation, Misfire, MIL Lamp on VIN: WAUKF78EX6
P0300: Misfire Recognized. Originally the car came in with a stumble and poor performance. We found the air filter pre-screen plugged and worn plugs. Cleaned the screen. Owner took car to dealer to see if they had any ideas. Dealer threw four new coils at it and sent him on his way. Cam...
October 19, 2009
2001 Chevrolet S10 4.3L Surge, Cuts out, MIL Lamp on VIN: 1GCCS19W11
P0300: Multiple Engine Misfire Detected. Hey All: This one has me stumped. Truck will start and idle fairly good. When accelerating under load (hills or passing or trying to get speed up ) it falls on its face and will stay running (barely) but NO POWER at all. Feels like a potatoe shoved in the tail...
October 20, 2009
2006 Audi A4 Quattro Avant 2.0L Hesitation, Misfire, MIL Lamp on VIN: WAUKF78EX6
P0300: Misfire Recognized. Originally the car came in with a stumble and poor performance. We found the air filter pre-screen plugged and worn plugs. Cleaned the screen. Owner took car to dealer to see if they had any ideas. Dealer threw four new coils at it and sent him on his way. Cam...
October 26, 2009
1997 Chevrolet Blazer 4.3L Misfire, spark knock VIN: 1GNDT13W4V
P0300: Multiple Cylinder Misfire Detected. The customer complaint is the check engine light flashing over 50 mph. Using a Tech2 the misfire graph is showing a slight misfire on all cylinders at all times while driving, over 50 mph #2 cylinder goes off the screen. I pulled #2 plug to look at it and the ...
October 26, 2009
1998 Audi A6 2.8L MIL Lamp on VIN: WAUAA24B0W
P0300: Random Misfire. Okay, well I have this 30 valve 2.8 A6 audi with a misfire code for all cylinders on Bank 2. Codes come back once vehicle has been warmed up and driven for a few blocks. Vehicle must be driven under light or heavy acceleration. There are no symptoms felt behi...
October 27, 2009
1998 Buick LeSabre Custom 3.8L Misfire, MIL Lamp on
P0300: Engine Misfire Detected. ... me crazy. Vacuum was 17 in., did Motorvac, raised to 20 in. Vehicle has code P0300 - Misfires. At idle and low speeds, cylinders 2 & 6 show misfies. Under load, cylinder 1 misfires, cylinders 2 & 6 do not. Swapped 1 & 3 plugs, changed coil - no...
October 27, 2009
1998 Chevrolet Malibu 2.4L Poor Idle Quality, Hesitation, Cuts out, Misfire, MIL Lamp on VIN: 1G1ND52T0W
P0300: Multiple Cylinder Misfire Detected. This vehicle came in running very poorly. I have found various problems with several systems as you can tell by the repair history.(the exhaust cam was even off a tooth due the the tensioner malfunction) Now I have isolated a misfire and bucking going up hill ...
October 28, 2009
2003 GMC Yukon XL 1500 SLT 5.3L Misfire VIN: 3GKFK16Z43
P0300: Multiple Cylinder Misfire Detected. misfire cyl 2 at idle only off idle no miss fuel pressure 48 psi flow good swapped injectors and coils with no help vacuum steady machine shop vacuum tested valves and cylinder said no problems fuel trims 4 while misfiring any other help would be great
October 28, 2009
2000 Jeep Grand Cherokee Laredo 4.0L Misfire, MIL Lamp on VIN: 1J4G248S4Y
P0300: Multiple Cylinder Misfire Detected. ... P0302, P0300, P0306. Removed coil pack and 6 plugs. Found 4 plugs to be cracked. Ohm checked the coil pack and it was out of specification. Installed 6 new Champion plugs and a new AC Delco ...
October 28, 2009
2001 Toyota Corolla LE 1.8L Cuts out VIN: 1NXBR12E71
P0300: Multiple Cylinder Misfire Detected. ... intermittently stalling\cutting off only at stops at idle. I was able to duplicate problem. Just idling in the bay in park in would cut off about every 15-45 minutes. It would immediately restart and run fine for another 15-45 min. I fixed the the P0300 P0...
October 28, 2009
2000 Chevrolet Express 3500 7.4L Misfire, MIL Lamp on VIN: 1GBJG31JXY
P0300: Multiple Cylinder Misfire Detected. Vehicle came in misfire detected ck misfire history cyl 3,5,6,&,7 have misfire history ck plugs ok ck dist cap ok did replace wires as # 6 was leaking. Performed an injector balance test and the results were all the same each cyl started at 51psi and ended...
October 29, 2009
2000 Honda Accord EX 3.0L Stall, Misfire, MIL Lamp on VIN: 1HGCG1658Y
P0300: Multiple Misfire Detected. ... about 10 minutes it either will not start or will run very rough and misfire. check engine light will come on and start flashing. checked it for codes and it has a p0300 p0301 p0302 p0304 ...
October 29, 2009
2000 Chevrolet Blazer LS 4.3L Hesitation, Misfire VIN: 1GNCT18W6Y
P0300: Multiple Cylinder Misfire Detected. ... or hesitation under heavy load, such as climbing a hill while accelerating. Ran with a fuel pressure gauge on the windshield and it maintains 60 psi through the event. I did replace the fuel filter anyway as it was original. I tied in a voltmeter to the do...
October 30, 2009
2001 Toyota Corolla LE 1.8L Cuts out VIN: 1NXBR12E71
P0300: Multiple Cylinder Misfire Detected. ... intermittently stalling\cutting off only at stops at idle. I was able to duplicate problem. Just idling in the bay in park in would cut off about every 15-45 minutes. It would immediately restart and run fine for another 15-45 min. I fixed the the P0300 P0...
October 30, 2009