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P0300 Diagnostic Trouble Code Discussion for January 2009

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
2002 Hyundai Sonata 2.7L Misfire VIN: KKMHWF35H4
P0300: Multiple Misfire Detected. ... This is the 2nd Hyundai I've ever worked before, and 1st time to ask for help in iATN ... This Sonata failed the smog check because of the Check Engine light stays on, the tailpipe emission is very clean as normal, but it has so many trouble codes, pulled ...
January 01, 2009
2006 Jeep Grand Cherokee Laredo 4.7L No Start, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1J8HR48P7C
P0300: Multiple Cylinder Misfire Detected. Very hard start when cold, then start stall and will not take fuel on acceleration until warm - pops out of intake. Five spark plugs had the ground electrodes melted off and all eight plugs were white from heat. Will start immediately when cold with propane an...
January 02, 2009
2002 Chevrolet Express 3500 LS 5.7L Stall, Misfire, MIL Lamp on VIN: 1GAHG39R12
P0300: Multiple Cylinder Misfire Detected. ... misfiring and a hard start problem.I found that the fuel pump was only puting out 40 psi.so it was replace and that took care of the hard start.after installing a new distributor I start having a p01345 code.found ot that the distributor was installed wron...
January 03, 2009
2004 Nissan 350Z 3.5L Poor Idle Quality, Hesitation, MIL Lamp on
P0300: Multiple Misfire Detected. ... pressure, compression, injectors spray patten, changed 3 injectors. removed Damaged TWC and replaced spark plugs, Still getting P0300 with the 304 305 306 injector patten was checked with injectors still attached and with engi...
January 03, 2009
2000 Chevrolet Blazer LS 4.3L Surge, Misfire, MIL Lamp on VIN: 1GNDT13W2Y
P0300: Multiple Cylinder Misfire Detected. Thanks For Any Help This truck will missfire only on light acceleration up to about 35 miles per hour.After 35 its gone.If you take off hard theres no miss.It will not miss under load in shop.Apears to only miss while moving.All scan data looks ok.STFT is 130...
January 05, 2009
2002 Chevrolet Express 3500 LS 5.7L Stall, Misfire, MIL Lamp on VIN: 1GAHG39R12
P0300: Multiple Cylinder Misfire Detected. ... misfiring and a hard start problem.I found that the fuel pump was only puting out 40 psi.so it was replace and that took care of the hard start.after installing a new distributor I start having a p01345 code.found ot that the distributor was installed wron...
January 05, 2009
2006 Jeep Grand Cherokee Laredo 4.7L No Start, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1J8HR48P7C
P0300: Multiple Cylinder Misfire Detected. Very hard start when cold, then start stall and will not take fuel on acceleration until warm - pops out of intake. Five spark plugs had the ground electrodes melted off and all eight plugs were white from heat. Will start immediately when cold with propane an...
January 05, 2009
2002 Mercury Villager (Van) Estate 3.3L Misfire
P0300: multiple misfires. vehicle has a misfire on cylinder #5 which has good spark, and a new injector. Old injector was shorted 2 Ohms of resistance. The ECM is pulsing the injector but the misfire remains. Thanks in advance for yhe help.
January 06, 2009
1999 Pontiac Grand Am SE 2.4L Cuts out, Stall, Misfire, MIL Lamp on VIN: 1G2NE5ZT5X
P0300: Multiple Cylinder Misfire Detected. vehicle will start to surge\stall under hard pull almost like running out of gas. with accelerator pedal to floor slight lift and will straighten up and run fine.does not have a definite missfire just surge and buck
January 06, 2009
2003 Honda Odyssey EX 3.5L Misfire VIN: 5FNRL18063
P0300: Random Misfire Detected. I'm having a misfire problem on this van. It happens when the engine comes back to an idle after a throttle plip with a cold engine. It also accures in a pull on the road with a cold or hot engine. It's still worse cold though. I have replaced the plugs. I als...
January 07, 2009
2000 BMW Z3 Roadster 2.5L Misfire VIN: 4USCH9345Y
P0300: Misc misfire. Hi everyone. Have in a 2000 BMX Z-3 2.5 with intermittent misfires. Started out having problem for 1st few miles of driving after sitting overnight, then drove perfect for a week. Now got worse and only occasionally will run good. Has codes for all misc misfir...
January 08, 2009
2002 Ford Windstar 3.8L Hesitation, Cuts out VIN: 2FTZA54432
P0300: random missfire. vehicle seems to cutout not cutoff ,at full or almost full throttle.almost like loose cranksensor or something similar.anything less than full throttle runs fine.the cylinder # 1 missfire doesnt seem to be true,it does not skip now or no random skip either.its...
January 08, 2009
2006 Ford F-150 XLT 5.4L Surge, Misfire VIN: 1FTPW14506
P0300: . Vehicle has a misfire under accelration at 40 mph if you hold it to the floor it feels like a misfire/surge. The check engine light was not on. sometimes it will also happen when leaving stop and then holding it wot. I can not get it to misfire by powerbraking...
January 08, 2009
2003 Mitsubishi Eclipse RS 2.4L Misfire VIN: 4A3AC34G63
P0300: Random Misfire Detected. car misfires at load only or fast revs.all ignition system check twice working properly. cyl. ok valves ok! notice with advantage on # 2 and #3 injectors harness,at load signal would loose drive signal to injector. #1 and 4 ok! when at idle drive signal to inj...
January 08, 2009
1997 Chevrolet Express 1500 5.7L Hesitation, Surge VIN: 1GNFG15R1V
P0300: Multiple Cylinder Misfire Detected. ... stated it was "surging" and "missing". We ran the codes and got a p0300 and a p0132. The intake was also leaking coolant. We replaced the intake gaskets with the updated units, as well as, changed the plugs...
January 09, 2009
2003 Chevrolet Silverado 2500 6.0L Misfire, MIL Lamp on VIN: 1GCHK23U53
P0300: Multiple Engine Misfire Detected. ... have this 2003 chevy 2500HD that is setting mainly the p0300 code but, has twice set the p0101 code, misfire history shows misfires mainly on cylinders 4 & 6, I have moved the coils, plugs, wires, injectors, and these cylinders still miss, mainly at hi...
January 12, 2009
2000 Nissan Quest GLE 3.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 4M2XN11T8Y
P0300: Multiple Misfire Detected. ... with a P0300. I did a two hour fuel injector flush,checked for vacuum leaks and found smoke coming from the Egr so went ahead and replaced it,and replaced the ignition rotor and cap because of obvious burnt spots . Afther all that the van still runs rough/...
January 12, 2009
1997 Chevrolet S10 2.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GCCS1449V
P0300: Multiple Engine Misfire Detected. ... ses light on p0300 stored misfires on cyl 3 sometimes on cyl 4 sometimes and also on 1&2 mostly on 3&4. but not consistant. have replaced no.3 spark plug and pcv valve (wrong one)have checked firing order (ok) coil res.(6k ohms)inj. drop (6psi at 1...
January 13, 2009
2001 Mazda MPV DX 2.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: JM3LW28Y01
P0300: Multiple Misfire Detected. ... - most due to bad vac. leak and intake valve controller bad. repaired vac. leaks and replaced controller for intake valves -well i was at it i replaced intake gaskets(common prob) and plugs and wires. here is the problem this engine misses bad(p0300) still...
January 13, 2009
2006 GMC Sierra 1500 WT 4.8L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on, sluggish VIN: 3GTEC14V76
P0300: Multiple Cylinder Misfire Detected. Customer complains of rough idle, sluggish, cel on. Above listed codes are confirmed. Misfire counters are very high on cyls. # 1,3,5,7, very low on #2,4,6,8.. HC slightly high O2 high at tailpipe, C0 low. Can enrich to get O2 to go high but at idle, O2 at .03...
January 14, 2009
2003 Honda Pilot EX 3.5L Surge, Misfire, MIL Lamp on VIN: 2HKYF185X3
P0300: Random Misfire Detected. Car came to the shop with all those codes mentioned including P0305 and P0306 and with the VTM ligth On , I went to test drive it and there was no misfire felt , only a shudder and jerking exactly around 50 miles per hour , if I kept going faster , shuddering ...
January 14, 2009
1999 Mazda Millenia 2.5L Misfire, MIL Lamp on VIN: JM1TA2212X
P0300: Multiple Misfire Detected. The car came in with no power and hardly running, plugs were fouled, spark was very weak on back bank. I replaced plugs, wires, cap, rotor, and distributor. The car now has lots of power and good spark on all cylinders. I pulled the timing covers and verified ...
January 14, 2009
2001 Mazda MPV DX 2.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: JM3LW28Y01
P0300: Multiple Misfire Detected. ... - most due to bad vac. leak and intake valve controller bad. repaired vac. leaks and replaced controller for intake valves -well i was at it i replaced intake gaskets(common prob) and plugs and wires. here is the problem this engine misses bad(p0300) still...
January 14, 2009
1999 Toyota Solara SE 3.0L Misfire, MIL Lamp on VIN: 2TICF28P7X
P0300: Multiple Cylinder Misfire Detected. This beast is very intermintant. When it the problem occurs it's like a switch. It will occur at start up or while driving down the road. The fuel trim #s are high only on one bank. Short FT #1 19.4 Short FT 52.2. the other bank SFT -7.9 lft -0.1. When there i...
January 14, 2009
2003 Volkswagen Passat GLS 1.8L Misfire, MIL Lamp on VIN: WVWPD63B23
P0300: multiple misfire. ... when vehicle has come to a stop. This mostly after car is driven and stopped for approx. 20 minutes and then driven again.Also states check engine light will flash.In addition to codes stated I also have codes P0300-p030...
January 14, 2009
2001 Ford F-150 King Ranch 5.4L Poor Idle Quality, Stall, MIL Lamp on VIN: 1FTRW08L71
P0300: random misfire. Good mourning guys I have this 01 f150 that is giving me hope for early retirement. Well came in with all of the codes listed. Found LTFT lean and cleaned MAF and reset,LTFT returned to specs.In mod $6 I had a misfire on every cylinder. Next took if for a test...
January 15, 2009
2002 Isuzu Rodeo LS 3.2L Misfire, LH bank dead VIN: 4S2DM58W02
P0300: Multiple Cylinder Misfire Detected. This vehicle came in with a missfire - found LH bank dead. Checked Spark, injector pulse - good but found low compression on that bank (160psi). Removed valve cover and found worn cams so replaced head and timing belt. After we had everything back together, st...
January 15, 2009
2000 Nissan Quest GLE 3.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 4M2XN11T8Y
P0300: Multiple Misfire Detected. ... with a P0300. I did a two hour fuel injector flush,checked for vacuum leaks and found smoke coming from the Egr so went ahead and replaced it,and replaced the ignition rotor and cap because of obvious burnt spots . Afther all that the van still runs rough/...
January 15, 2009
2000 Chevrolet Astro 4.3L Misfire, MIL Lamp on VIN: 1GNEL19W6Y
P0300: Multiple Cylinder Misfire Detected. came in with Random misfire code---found intake leaking coolant-worn distributor gear fixed the rough idle at all times-put in new injectors--misfire on cyls 2 and 3 found partially collapsed lifter on cyl 2-have check egr etc--do these have valve issues--I ha...
January 16, 2009
1998 Pontiac Sunfire SE 2.2L Excessive Emissions, Poor Idle Quality, Misfire VIN: 1G2JB1245W
P0300: Multiple Engine Misfire Detected. car came in missing really bad when cold. check engine light on and rls. checked codes and did tests on sensors. replaced plugs wires and cam sensor as it was cracked. cleared codes and started engine ran great. road tested and it started to act up after it wa...
January 17, 2009
1999 Cadillac Catera 3.0L Poor Idle Quality, Hesitation, Surge, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: W06VR52R9X
P0300: Multiple Cylinder Misfire Detected. Vehicle had not been driven in 6 months, and very little prior to that for a couple of years. Replaced fuel pump after recent storage and got vehicle running. After 300 miles, misfires increased, and very difficult starting due to cold Florida temps in 50's. ...
January 18, 2009
2004 Chrysler PT Cruiser 2.4L No Start, Misfire, MIL Lamp on VIN: 3C4FY48D84
P0300: Multiple Cylinder Misfire Detected. ... diagnosis and had spark arching from coil. this vehicle died and will not start in the bay. when i turn the key (nothing). code p0499 (nvdl vent solenoid) will not clear and the asd relay is tripped everytime the key is ...
January 19, 2009
1997 Saturn SL1 1.9L Misfire VIN: 1G8ZG5286V
P0300: Random Misfire Detected. installed reman engine because old one was knocking(rod) got done and test drove. ran fine ,turned around to come back the check engine light came on. got back and scanned it had the misfire code, checked the counters found # 1 & # 4 missed exactly the sam...
January 19, 2009
2008 Jeep Commander (Truck) Limited 5.7L Poor Idle Quality, MIL Lamp on VIN: 1J8HH58298
P0300: Random misfire. Vehicle has good power and runs very well other than at idle. Cylinders 1 and 7 drop out at idle but computer seems to only pick up a random misfire code. We broke two of the multidisplacement solenoids during the short block replacement. They are very cheezy ...
January 20, 2009
1999 Chevrolet Blazer 4.3L Misfire VIN: 1GNDT13W1X
P0300: Multiple Cylinder Misfire Detected. ... wheel drive Used engine installed. Completed 1/12/09. Car ran perfectly for 40 miles than developed a miss. Codes P0300 and P0302 present. Upon inspection with scanner major misfire occurring on cylinder 2 with cylinder 5 showing about a quarter of cyl. 2...
January 21, 2009
1999 Cadillac Catera 3.0L Misfire, MIL Lamp on VIN: W06VR522R8
P0300: Multiple Cylinder Misfire Detected. Vehicle came in with very bad misfires, scanned and found multiple misfire codes as well as random misifire code. We checked spark plugs and replaced all. Checked coil outputs and found they were poor, relaced coils and vehicle ran good, returned to customer. ...
January 22, 2009
1998 Land Rover Discovery LE 4.0L Poor Idle Quality, Hesitation, Poor Fuel Economy, MIL Lamp on, HARD START VIN: SALJY124XW
P0300: random multiple misfire. Hello Land Rover techs. I have this Disco that is giving me some problems. First problem is My scan tool is not very good in LR's Second is that Mitchell sucks for LR's. I have seen this vehicle before for the same problem but, it is getting worse. The problem...
January 22, 2009
2001 Mercedes-Benz S600 5.8L Excessive Emissions, Hesitation, Surge, Misfire, Poor Fuel Economy, MIL Lamp on VIN: WDBNG78J31
P0300: multi miss fire. Vehicle came in with numerous codes PO208F, P2003, P2050, PO2052, P20C9 P2013 P20E0 P20A5 P020C6. Cleared codes test drove, replaced ignition coil module and plugs for both banks and missfire codes for all cylinders have returned at different times, along with...
January 22, 2009
2000 Toyota Sienna CE 3.0L Misfire VIN: AT3ZF13C9Y
P0300: Multiple Cylinder Misfire Detected. This sienna mini van bogs and misfires under full throttle load, we replaced the fuel filter, serviced the injectors, and it didn't fix the problem. We tested fuel pressure, Mass Air Flow meter, throttle position sensor, and replaced the plugs and wires. Still...
January 22, 2009
1995 Chevrolet Blazer 4.3L Poor Idle Quality, Poor Fuel Economy, MIL Lamp on VIN: 1GNDT13W3S
P0300: Random Missfire detected. Hello gentlemen, this Blazer runs rich all the time. Fuel pressure is 54psi and rises to 60psi when you snap throttle. Oxygen sensors are at 800-950mv constantley and the computer is trying to hold back fuel - injector time is 0.1ms. Air filter is clean, there...
January 23, 2009
2000 Volkswagen Jetta TDI 1.9L Poor Idle Quality, Cuts out, Misfire, Poor Fuel Economy VIN: 3VWSF29M6Y
P0300: cyl 3 misfire. hello vw techs, this car has a hard start condition and blows blue smoke.removed poor fuel and installed new low sulfer diesel.able to start vehicle with accelerator depressed.exssesive crank time.read measure value block 13 quantity injected cyl's 1,2,4 stay ...
January 23, 2009
2002 Chevrolet Tahoe LS 5.3L Surge, Misfire, MIL Lamp on VIN: 1GNEK13Z42
P0300: Multiple Cylinder Misfire Detected. ... vehicle under hard acceleration power falls off and the engine begins to surge. If the throttle is backed off a little then the power returns. The first code to come up was a P0301 so I moved the coil pack, plug wire, and pl...
January 24, 2009
1999 Mazda Millenia S 2.3L Poor Idle Quality, Hesitation, Cuts out, Misfire, MIL Lamp on, CNT REV OVER 2200RPM VIN: JM1TA2227X
P0300: Multiple Misfire Detected. Car starts fine, idle is poor, and clearly misfiring. After 2-3 minutes of driving "TCS off" and TCS Lamp comes on and engine can not rev over 2200 rmp. Had prior O2 sensor codes fixed by replacing downsteam sensors one was cracked. Had replaced spar...
January 24, 2009
2002 Nissan Maxima SE 3.5L Misfire, MIL Lamp on VIN: JN1DA31D62
P0300: Multiple Misfire Detected. ... have a 3.5 maxima that keeps setting a p0300 random misfire you can drive this car and it drives perfect plenty of power but at idle you can feel a very faint inermitant miss fire not always there you clear the code and it dose come back. customer reports ...
January 24, 2009
1999 Oldsmobile Alero GL 2.4L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G3ML52T1X
P0300: Multiple Cylinder Misfire Detected. we have replaced all four injectors and coil housing, we injector pulse with and the crk and cam sensors show correct data we have checked for pcm ground and found no problems there. is it possibe for the ign module to short or the pcm drivers to cross short. ...
January 26, 2009
2002 Checker 1500 Silvera 5.3L Misfire VIN: 2GCEK19T32
P0300: multiple misfire. Pickup came in with p0300 code (multiple misfire). It misses less at idle but on a road test watching scan tool misfiring. The cylinder on bank 2 are missing. cyl. 4 and 6 miss terrible and 2 and 8 not as bad. This engine was replaced by a GM dealer 20,000 mil...
January 27, 2009
1998 Chevrolet Venture 3.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GNDX03E7W
P0300: Multiple Cylinder Misfire Detected. This van came in running ruff with po300 after checking codes we found some misfires on different cylinders but #1 was missing all the time I check for spark and it was ok lissen to injector it seam to be working.Ok here is what I have done. I resealed the int...
January 27, 2009
2004 Chevrolet Cavalier 2.2L Excessive Emissions, Poor Idle Quality, Misfire, Flooding VIN: 1G1JC52F54
P0300: Multiple Engine Misfire Detected. Customer complaint of miss @ idle. Verified after start up when engine idles down it will act like it is loading up on fuel, O2 sensor remains in high 800 - 900 mlvolts, fuel trim LT -14 to-18 ST -10 to -18. Vacuum starts @ 15hg drops to 9-10hg when engine is ...
January 27, 2009
1997 Chevrolet K1500 Cheyenne 5.7L Misfire VIN: 1GCEK19R1V
P0300: Multiple Cylinder Misfire Detected. i have a problem child here, this truck has a missfire on cylinders 2 & 6 constantly, seems to be fireing out exhaust at least partially. heres where we started, scan for codes found codes as noted also noted no sync pid on scanner and mass flow flatlined,...
January 28, 2009
1998 Chevrolet Venture 3.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GNDX03E7W
P0300: Multiple Cylinder Misfire Detected. This van came in running ruff with po300 after checking codes we found some misfires on different cylinders but #1 was missing all the time I check for spark and it was ok lissen to injector it seam to be working.Ok here is what I have done. I resealed the int...
January 28, 2009
2000 Pontiac Sunfire GT 2.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: 3G2JD12T3Y
P0300: Multiple Engine Misfire Detected. ... p0300 (random misfire) and p0420 (cat efficiency) were in memory. both happened at idle, p0420 in park and p0300 in 2nd gear. both no vehicle speed - freeze frame does supply temp reading. When the tranny is in park it sounds like it runs lean. When it is ...
January 28, 2009
2002 Mazda Protege5 2.0L No Start, MIL Lamp on VIN: JM1BJ24552
P0300: Multiple Misfire Detected. Very intermittant missfire code PO 300 at times the MIL light will flash. Ongoing for months. Origonally it would act up every few weeks then once or twice a week. When its runnign right it is flawless. I started with Mazda plugs and insulator/wires off coil...
January 29, 2009
1996 Oldsmobile Bravada 4.3L Surge, Misfire, MIL Lamp on VIN: 1GHDT13W5V
P0300: Multiple Cylinder Misfire Detected. Intermittently shows missfire at highway speed.freeze frame also show misfire occurs at or above 60mph.also had torque converter slipage fault set at one time.fuel pressure ok.does not miss at dile or if power brake it.any idea guyz
January 29, 2009
1997 Buick LeSabre Custom 3.8L Misfire, MIL Lamp on VIN: 1G4HP52K6V
P0300: Engine Misfire Detected. hello everyone. this vehicle came in on monday. at start up i noticed fuel pump noisey and a misfire. checked fuel press. it was 30psi so we put pump and filter in it. still misfire was there. checked scanner readings, all cylinders had counts on them between ...
January 30, 2009