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P0300 Diagnostic Trouble Code Discussion for May 2007

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
1996 Chevrolet Caprice Classic 4.3L Hesitation, Cuts out, MIL Lamp on VIN: 1G1B152W1T
P0300: Multiple Engine Misfire Detected. help; this caprice came in runs rough warm. feels like missfire. put it on scope in drive under load cly 2-4-6-8 seems to have problem with fire line and spark line on scope when its running rough. on even clyinders from fire line to spark line does not start ...
May 01, 2007
2000 Oldsmobile Intrigue GX 3.5L Hesitation, Surge, Cuts out, Misfire VIN: 1G3WH52H9Y
P0300: Multiple Cylinder Misfire Detected. This car idles fine when you accelerate it starts to dog down like clogged cat.checked fuel pressure was fine doesnt drop. checked the egr and on light acceleration it was opening 100% and dogging down dont know if it was normal..i disconnected it and now it a...
May 01, 2007
2000 Toyota 4Runner Limited 3.4L Misfire VIN: JT3GN87R4Y
P0300: Multiple Cylinder Misfire Detected. Need some ideals please. This vehicle came back after we replace waterpump & timing belt. At the same time we replace plugs (NGK),the three wires,fuel filter & cleaned throttle body. Now we have po300 & po303. Freeze frame showed 300 & 303 to o...
May 01, 2007
2006 Land Rover Range Rover Supercharged 4.2L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire VIN: SALMF13426
P0300: random misfire. This one has been an issue for the past three weeks in my shop.Only on cold start when the vehicle is put in drive it will misfire and fall flat on its face.Once you cycle the ignition the problem will go away or if you let it run for approximately 2 minutes.I...
May 02, 2007
2002 Buick LeSabre Custom 3.8L Misfire VIN: 1G4HP54K92
P0300: Multiple Engine Misfire Detected. ... Vehicle came into our shop from the dealer which was diagnosed as a valve problem. The customers complaint is a rough idle. No misfire can be felt on acceleration or when cruising. Found a history code p0300 stored. Check...
May 03, 2007
1999 Chevrolet Astro 4.3L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1GNDM19W3X
P0300: Multiple Cylinder Misfire Detected. van came from another shop with rebuilt engine complaining about hesitating,no start and idle.they installed cam,crank sensors.i scoped and scaned engine,everything looked good except idle,too high.I changed cap,rotor,wires,that seemed to remedy the no start t...
May 03, 2007
2001 GMC Savana 3500 5.7L MIL Lamp on VIN: 1GDHG31R81
P0300: Multiple Cylinder Misfire Detected. we install new reman. engine complete with all sheet metal. after install check engine light flashed then came on solid. tested ignition sytem with scope could see no problems, replace cap and rotor second time and retest drove with same results, scope tested ...
May 03, 2007
2002 Audi A6 3.0L Misfire, MIL Lamp on VIN: WAULT64B12
P0300: random misfire. This is actually my personal car no repairs have been made recently i thought a cam sensor was bad so i swapped them around with a know good sensor since i was not sure which one vas bad all i knew was bank 2 but everytime the misfire codes come back along wit...
May 04, 2007
2002 Mazda Protege5 2.0L Misfire, p0300 VIN: JM1BJ24622
P0300: Multiple Misfire Detected. multiple cyl misfire and loss of power very intermitant, happens after starting only very intermitant, happens only for about 5 min then smooths out, happens 3 times per week, have not been able to duplicate concern, multiple test drive. any ideas would be gre...
May 04, 2007
2002 Audi A6 3.0L Misfire, MIL Lamp on VIN: WAULT64B12
P0300: random misfire. This is actually my personal car no repairs have been made recently i thought a cam sensor was bad so i swapped them around with a know good sensor since i was not sure which one vas bad all i knew was bank 2 but everytime the misfire codes come back along wit...
May 05, 2007
1995 Buick LeSabre Custom 3.8L Stall VIN: 1G4HP52L75
P0300: Misfire detected. ... Buick. According to the owner this has been stalling intermittently for quit a while but it always starts back up immediately. They took it to a dealer a while back and he said they replaced a "wire on top of the engine". I'm assuming a plug wire. ...
May 05, 2007
1996 Dodge Grand Caravan SE 3.3L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 1B4GP44R3T
P0300: Multiple Cylinder Misfire Detected. O.K. this vehicle came in last week. Customer said they had just filled up with gas and then the van ran bad. The fuel gauge reads 3/4 full. Checked the current ramp on the Red/Yellow wire, Coil driver #3. Flatlined. Checked the other two wires, nice picture...
May 08, 2007
2000 Mazda Miata 1.8L Misfire, MIL Lamp on VIN: JM1NB3536Y
P0300: Random Misfire Detected. ... misfire, usually after starting, vehicle has been to me twice with P0300 code vehicle always runs good when it gets to me. fuel pressure in spec. plugs look good, coils test ok,
May 08, 2007
2005 Ford Crown Victoria 4.6L Cuts out, MIL Lamp on VIN: 2FAFP71W45
Ok guys I have several of my cruisers doing this,..after sitting going to take off they buck/surge stumble and die. Sometimes they will restart. I have performed the T.S.B. for this problem,.removing the engine cover and reprogramming,.to no avail. I even sent...
May 09, 2007
1999 Cadillac Catera 3.0L Surge VIN: W06VR52R3X
P0300: Multiple Cylinder Misfire Detected. tested relay and fuse, jumped relay works fine. disconnected vacumm solenoid, verified vacumm and air flow. Jumped relay again and verified air flow to engine by 02 stats. snap-on mt2500 no ability to activate from scanner. Intermittently hear sec AIR motor ru...
May 10, 2007
2004 Chevrolet Impala 3.4L Hesitation, Misfire, Poor Fuel Economy VIN: 2G1WF52E84
P0300: Multiple Cylinder Misfire Detected. ... sometimes for a second when the vehicle is cruising approx 60 mph. I was able to verify the symptom. I drove the vehicle for approx 5 miles and it ran great. No misfire showed on the scan tool data except twice where a few cylinders misfired but wasn't abl...
May 10, 2007
2005 Ford Crown Victoria 4.6L Cuts out, MIL Lamp on VIN: 2FAFP71W45
Ok guys I have several of my cruisers doing this,..after sitting going to take off they buck/surge stumble and die. Sometimes they will restart. I have performed the T.S.B. for this problem,.removing the engine cover and reprogramming,.to no avail. I even sent...
May 10, 2007
1999 Mitsubishi Galant ES 2.4L No Start, Misfire VIN: 4A3AA46G7X
P0300: Random Misfire Detected. ... running. No obvious damage to exterior. Attempted to start, no start. Scanned for codes, found code p0300, multiple misfire. Tested for ignition fire, found ignition fire on all cylinders. Tested cam and crank sensors, found correct waveforms on both. Test...
May 10, 2007
1996 GMC Yukon SLE 5.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GKEK13R8T
P0300: Multiple Cylinder Misfire Detected. Hey everyone, I make it a point not to post unless I am up against it, and with this one I am. This 96 Yukon 5.7R has been to multiple shops with many parts replaced, and still a check engine light/misfire. I have found all cylinders show misfires, as well as ...
May 11, 2007
1996 Saab 900 SE Turbo 2.0L MIL Lamp on VIN: YS3DF78N2T
P0300: Random Missfire. This car with your guys help is diag. with a def. ignition casset months ago. The customer can't get over the price of the new (red) ignition casset.Some one has told him that the newer (black) casset that is half the price will work and won't have the repeate...
May 11, 2007
1999 Chevrolet Astro 4.3L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1GNDM19W3X
P0300: Multiple Cylinder Misfire Detected. van came from another shop with rebuilt engine complaining about hesitating,no start and idle.they installed cam,crank sensors.i scoped and scaned engine,everything looked good except idle,too high.I changed cap,rotor,wires,that seemed to remedy the no start t...
May 13, 2007
1998 Chrysler Sebring LX 2.5L Hesitation, Surge, Cuts out, Stall, Misfire VIN: 1FR5478HLH
P0300: Multiple Cylinder Misfire Detected. this vehicle wont go away happens very intermittent breaks up really bad no power. then will clear out and go away,the it will act up when it wants to.
May 14, 2007
1996 GMC Yukon SLE 5.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GKEK13R8T
P0300: Multiple Cylinder Misfire Detected. Hey everyone, I make it a point not to post unless I am up against it, and with this one I am. This 96 Yukon 5.7R has been to multiple shops with many parts replaced, and still a check engine light/misfire. I have found all cylinders show misfires, as well as ...
May 14, 2007
2002 Kia Sedona LX 3.5L Misfire, MIL Lamp on VIN: KNDU131126
P0300: Multiple Misfire Detected. vehicle came in with ck engine light and misfire, ck codes had po305 po303 misfire coming and going at first now missing all time at idle replaced plugs wires and #2 ign coil witch fires# 5 plug flow tested injectors all tested ok injector ohm test tested 12.5...
May 14, 2007
2001 Mazda Protege MP3 2.0L Misfire VIN: JM1BJ22761
P0300: Multiple Misfire Detected. ... another shop. he had a 2001 mazda protoge 2.0l dohc mp3 come in with a p0300 multiple misfire code. he replaced the coils and spark plugs but still had misfires. he removed the new coils and installed the original coils thinking that they were ok. i looked...
May 15, 2007
1998 Cadillac DeVille 4.6L Misfire VIN: 1G6KD54Y1W
P0300: Engine Misfire Detected. hello all im just about bald on this one i have done compression test 170 being lowest and 195 being highest lookest at o2 sensor voltages maf sensor readings map sensor readings pulse width coolant temp sensor and ait temp car is running rich and dont sprayed...
May 17, 2007
1999 Chevrolet K1500 Suburban 5.7L Misfire, MIL Lamp on, P0300 VIN: 3GNFK16R2X
P0300: Multiple Cylinder Misfire Detected. I need some help thinking outside the box here. This is my personal vehicle so I have some latitude here...This truck has been driving me nuts for tens of thousands of miles. This problem can be duplicated repeatedly under these conditions. A long slow grade (...
May 21, 2007
2005 GMC Sierra 1500 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2GTEK19B35
P0300: Multiple Cylinder Misfire Detected. customer came in with rough idle. scanned computer and found code po300-random cylinder misfire checked and replaced spark plug on #5 due to almost all misfires recording on that cylinder. removed fuel rails and cleaned injectors and performed motorvac as we h...
May 21, 2007
1997 Chevrolet S10 4.3L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GCCS19X3W
P0300: Multiple Engine Misfire Detected. Ok guys this one i cant figure out for nothing. looking for a little guidence. This nightmare came in the shop running really bad at idle with no acceleration. i had a misfire on all the right side cylinders only. So i did what i have done on many of these. to...
May 22, 2007
1998 Chrysler Sebring LX 2.5L Hesitation, Surge, Cuts out, Stall, Misfire VIN: 1FR5478HLH
P0300: Multiple Cylinder Misfire Detected. this vehicle wont go away happens very intermittent breaks up really bad no power. then will clear out and go away,the it will act up when it wants to.
May 22, 2007
1997 Dodge B2500 3.9L Cuts out, Misfire, MIL Lamp on VIN: 2B7HB21X3V
P0300: Multiple Cylinder Misfire Detected. Van originally came in with a low charging voltage & misfire # 4 cylinder code with a complaint of no power. Scoped the ignition & found a bad plug wire to number 4. Replaced the set with a new cap & rotor. Looked good on the scope & test drove...
May 23, 2007
2001 Acura MDX 3.5L Misfire VIN: 2HYD18651H
P0300: Random Misfire Detected. i am pulling my hair out on this car. the only thing that i have noticed lately is in freeze frame occasionally stft1 was record at 12% can not get it to do that when i am monitoring it. i do not every fell the engine misfire went the cel comes on. and sometim...
May 24, 2007
1996 Chevrolet Lumina APV 3.4L Misfire VIN: 1GNDU06EZT
P0300: Multiple Cylinder Misfire Detected. van came in with a rod knock. replaced engine with used 2002 3.4l with 50k. costomer is union man always gone. he complained of surging at highway speeds. van has a miss on #1. but also on # 4,5,6 #1 miss comes and go's. #4,5,6, are connected in the fact they ...
May 24, 2007
1999 Hyundai Sonata 2.4L Hesitation VIN: KMHWF25S3X
P0300: Multiple Misfire Detected. hello out there. this sanota after it sits for a hour or so will start and idle fine. when you step on the gas it hesitates really bad after a minute of running its ok. my fuel pressure is good 60 psi . its running lean because my o2 is reading very low. even ...
May 24, 2007
2001 Jeep Wrangler Sport 4.0L Stall, MIL Lamp on VIN: 1J4FA49S41
P0300: Multiple Cylinder Misfire Detected. cleared codes. After drving & stalling again, P1391 came back. Replace crank sensor. After 100 miles P1391,PO351,PO353 came back. Rep cam sensor + oil pump drive + ASD relay replaced. PO351 & 352 came back. repl Coil pack w/known good unit. As of to...
May 24, 2007
1997 Oldsmobile Cutlass Supreme SL 3.1L Misfire, MIL Lamp on VIN: 1G3WH52M7V
P0300: Multiple Engine Misfire Detected. Car came in with misfire code po302, found #2 plug shorted, rplaced all plugs, wires, test ran now has code po300 random misfire all cylinders except #4 showing misfires with # 2 with the most, replaced injectors with good used ones due to customers budget, mo...
May 25, 2007
2004 Honda Accord EX 3.0L Poor Idle Quality, MIL Lamp on VIN: 1HGCM81794
P0300: Random Misfire Detected. Don't want to shoot from the hip on this one. There is obviously something common to all cylinders causing this rough idle. I have spent a lot of time looking at data, and cannot find anything out of the ordinary. This car seems to drive perfectly fine, smooth...
May 30, 2007
1998 Cadillac Catera 3.0L Misfire, MIL Lamp on VIN: W06VR52R9W
P0300: Multiple Cylinder Misfire Detected. missfire codes #1#2#3. also, codes had been cleared recently. changed plugs which had oil on them due to leaky valve cover gaskets (cust. does not want to spend $ to replace gaskets) cleared codes and still miss and light on immediatly. checked codes, got miss...
May 31, 2007