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P0300 Diagnostic Trouble Code Discussion for January 2010

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
2006 GMC Sierra 2500 HD SLE 6.0L MIL Lamp on VIN: 1GTHK29U76
P0300: Multiple Cylinder Misfire Detected. ... this problem child here that will set a P0300 code randomly, but runs great. The problem used to occur at 60 mph while cruising, and could take months to reset. Now since I relearned the crank, it occurs at 45 mph while cruising. Now when this truck first ...
January 03, 2010
2006 Chevrolet Express 3500 6.0L Misfire, MIL Lamp on VIN: 1GAHG39U46
P0300: Multiple Cylinder Misfire Detected. ... tp% 10 app% 0 open /closed (closed) st trim 1%---5 lt trim-1%---18 st trim 2%---3 lt trim-2%---12 eng load%--17 map(hg)10.4 coolant F 187 map(v)1.13 map(gm/sec)5.75 veh speed 0 tcs active tcc command(off) tank pressure (v)1.39 baro hg(n/a) idle (550)inj pw...
January 04, 2010
2000 Volkswagen Passat GLS 2.8L MIL Lamp on VIN: WVWVD23B2Y
P0300: Intermittent misfire 16684. I replaced the chain tensioner a few months ago. I TRIPLE checked the timing. I have 16 links between the two marks on the cam that are lined up perfectly with the arrows on the caps when the crank pulley is lined up with the notch on the timing cover and both...
January 04, 2010
2006 GMC Yukon Denali 6.0L Excessive Emissions, Poor Idle Quality, Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on, running extrem rich VIN: IGKFK66U16
P0300: Multiple Cylinder Misfire Detected. hello and thanks in advanced the customer broke down drove this truck in it wont idle on its own you have to hold your foot on the gas pedal , i check code listed above the customer stated this happen all of a sudden the fuel trim has a neg reading -19 and the...
January 05, 2010
2000 Volkswagen Passat GLS 2.8L MIL Lamp on VIN: WVWVD23B2Y
P0300: Intermittent misfire 16684. I replaced the chain tensioner a few months ago. I TRIPLE checked the timing. I have 16 links between the two marks on the cam that are lined up perfectly with the arrows on the caps when the crank pulley is lined up with the notch on the timing cover and both...
January 05, 2010
2002 Chevrolet Impala 3.8L Misfire VIN: 2G1WF55KX2
P0300: Multiple Cylinder Misfire Detected. This vehicle has a misfire at IDLE ONLY on #1 cylinder only after it is hot. Cold start is ok. As soon as the throttle is opened when it is misfiring, it goes away. Long term fuel trim was at 10% and short term was 0. We have performed a motorvac fuel service ...
January 06, 2010
2006 GMC Yukon Denali 6.0L Excessive Emissions, Poor Idle Quality, Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on, running extrem rich VIN: IGKFK66U16
P0300: Multiple Cylinder Misfire Detected. hello and thanks in advanced the customer broke down drove this truck in it wont idle on its own you have to hold your foot on the gas pedal , i check code listed above the customer stated this happen all of a sudden the fuel trim has a neg reading -19 and the...
January 06, 2010
2002 Nissan Quest GLE 3.3L Misfire, MIL Lamp on VIN: 4N2ZN17T02
P0300: Multiple Misfire Detected. Hi techs. I have this Nissan in for misfire & MIL activation. I isolated the fault to # 4 cyl. & amp waveform on the inj fuse showed #4 at 0 amps. Sure enuff, that injector is faulty-open ckt. I called the dealer parts dept. & they want to know whi...
January 06, 2010
2004 Chevrolet Aveo 1.6L Hesitation, Surge, Misfire, MIL Lamp on VIN: KL1TD62674
P0300: Engine Misfire Detected. Call me a fool but i have read everything on Iatn about this condition and i had the intake and exhuast valves resurfaced! After many trips to a hole in the wall machine shop i decided to take it to another machine shop that told me the valves stem height was ...
January 07, 2010
2004 Dodge Ram 1500 Truck SLT 4.7L Excessive Emissions, Stall, Misfire VIN: 1D7HU18N94
P0300: Multiple Misfire Detected. got this truck in and customer said it was running great down the freeway and then started loosing power. customer would accelerate and but could not get over 40 to 45 mph. truck would die sometimes but always restarted. runs like crap. has sever engine misfir...
January 07, 2010
1999 Land Rover Discovery SD 4.0L Poor Idle Quality
P0300: random misfire. Hello, All Land Rover guys I have a big problem with this Discovery High Idle. Vehicle came in with high idle around 2500 to 3000. Changed idle air valve no change... Changed Throttle position sensor No change... Before all this I did smoke test... Nothing Maj...
January 07, 2010
2002 Chrysler Town & Country (Van) LX 3.8L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire, MIL Lamp on VIN: 2C4GP44382
P0300: random missfire. ... engine light on. We started out by replacing the coil pack,plugs,wires,clean fuel injectors. The van ran the same (when it came in it had codes P0172,P0300). We recheked codes and the one trip codes were 300,302,303,172. We re...
January 08, 2010
1999 Land Rover Discovery SD 4.0L Poor Idle Quality
P0300: random misfire. Hello, All Land Rover guys I have a big problem with this Discovery High Idle. Vehicle came in with high idle around 2500 to 3000. Changed idle air valve no change... Changed Throttle position sensor No change... Before all this I did smoke test... Nothing Maj...
January 08, 2010
2001 Volkswagen Jetta GLS 1.8L Hesitation, Cuts out, Misfire VIN: 3VWSD68M11
P0300: random missfire. car looses power under load above 3000rms. feels like a missfire on all cylinders. usually only when cold. will do it for about 30 minutes of constant driving then clear up. it does it whether the mass air flow is plugged in or not. i replaced spark plugs,inst...
January 09, 2010
2001 Volkswagen Jetta GLS 1.8L Misfire, MIL Lamp on VIN: 3VWSD69M21
P0300: random misfire. This vehicle has come is with the same codes 2 times.The maf was replaced & codes cleared and vehicle was good for about 1 month.We reinspected and found the wire harness to the ignition coils cracking.Found bulletin in alldata #04-02 for a wire harness ov...
January 10, 2010
2007 Chevrolet Silverado 2500 HD Classic LT 6.0L Misfire VIN: 1GCHC23U77
P0300: Multiple Cylinder Misfire Detected. When vehicle first came to the shop found misfires on all cyl. Tune-up was done at this time. After tune-up we found cyl 8 continued to miss but only at Idle. ran compression test and fourn cyl 8 low. Did head job and reinstalled head after returning from head...
January 11, 2010
2003 Mazda 6 S 3.0L Hesitation, lacks power VIN: 1YVFP80D63
P0300: Random Misfire Detected. ... with a MIL. found code P0300, stress tested the front 3 coild and found one bad pattern. replaced coil and cleared codes. on road test vehicle lacked power MIL flashed and then came on setting code P0300. I removed the intake and swapped the rear coils wit...
January 12, 2010
2001 Buick Rendezvouz 3.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: 3G5DBO3E12
P0300: Random cylinder misfire. now the car runs bad has a po300 random misfire.my helper for some reason thought he should remove the harmonic balancer could we have upset the air gap for the sensor?
January 13, 2010
2004 Chevrolet Avalanche 1500 5.3L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 3GNEK12T14
P0300: Multiple Cylinder Misfire Detected. Truck is sort of intermittant but it always adds fuel to bank 1, and around 25% at idle though the pulse width looks the same as the other bank. Will sometimes run very well, next time VERY rough idle. Usually, #1 cyl will miss most, and some for #3, but now w...
January 13, 2010
2005 Chevrolet Silverado 1500 5.3L Misfire VIN: 1BGTYUII66
P0300: Multiple Cylinder Misfire Detected. Fuel trim bank 1 is stuck at +25% WITH IGNITION ON and engine off. I have dis-connected battery and tried again, same results. STFT are at 0 on both banks. Plugs are black with soot on bank 1, beautiful on bank 2, cant find any intake leaks from the outside, ...
January 13, 2010
1997 Chevrolet C1500 5.0L Misfire VIN: 2GCEC19M4V
P0300: Multiple Cylinder Misfire Detected. This vehicle came in not running. The guy parked it because it ran bad. It's been sitting a couple of years, the plate expired in '08. Started with fuel pump & filter. Gas was varnished and emptied it out. I put in 6 gallons of Chevron 87 grade. Truck star...
January 14, 2010
2000 Chevrolet Astro 4.3L Cuts out, MIL Lamp on VIN: 1GMDM19W3Y
P0300: Multiple Cylinder Misfire Detected. Gentlemen, This vehicle has a miss when driving with no load or if you rev it up while sittingbut if you brake torque it does not miss at all, missfire is the worst on 3 and 4 but also on 1 2 & 5, wires cap and rotor, coil new. Had a problem with no power ...
January 14, 2010
2004 Ford F-150 XL 4.6L Poor Idle Quality, Misfire VIN: 2FTRX18W34
P0300: random misfire. We have performed a cylinder leakage test as well with less than 10% loss. The vacuum at idle is bouncing around 15-16 inches so we're thinking valve springs but because compression is good and smoke testing indicated no leaks, we're not sure yet. Moving coils...
January 15, 2010
2005 Ford Taurus SE 3.0L Poor Idle Quality, Surge, Melted intake VIN: 1FAFP56275
P0300: random miss. This vehicle cam in with these codes a week ago. Found holes in the intake (melted) where the pcv hose goes into the upper intake. Also noted extremely hot pcv assembly hose. Checked for restricted exaust, checked ok. Replaced intake and pcv heater, and had a ...
January 15, 2010
2008 Mazda RX-8 Sport 1.3L Excessive Emissions, MIL Lamp on VIN: JM1FE17N65
P0300: random misfire. One again we have to ask for help. First thanks for the time to look to my problem. It been sit for 6 months and customer drive and die out on the street. Tow to the dealer with diagnostic bad starter foul spark lug, bad battery. at the shop with jump it start...
January 15, 2010
1999 Pontiac Montana 3.4L Misfire VIN: 1GMDX03E2X
P0300: Multiple Cylinder Misfire Detected. ... kicked down) the MIL lamp flashes and code P0300(muliple misfire) results. Not sure if I can feel misfire though. Misfire history indicates only #1 cylinder misfires(1960 total count). Rev limiter cuts in below 4000rpm only in park or neutral so that's not...
January 15, 2010
1999 Pontiac Montana 3.4L Misfire VIN: 1GMDX03E2X
P0300: Multiple Cylinder Misfire Detected. ... kicked down) the MIL lamp flashes and code P0300(muliple misfire) results. Not sure if I can feel misfire though. Misfire history indicates only #1 cylinder misfires(1960 total count). Rev limiter cuts in below 4000rpm only in park or neutral so that's not...
January 16, 2010
2005 Jeep Grand Cherokee Limited 5.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1J4HR58235
P0300: Multiple Cylinder Misfire Detected. ... a 2005 Jeep Grand cherokee with a 5.7 litre.I had codes of p1417-p0300, cylinder #7 reactivation solenoid and random misfire.I cleared the codes and test drove.At about 35mph the vehicle began to shake and the CEL light b...
January 17, 2010
2006 Chevrolet Monte Carlo SS 5.3L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 2G1WL15C86
P0300: Multiple Engine Misfire Detected. This is driving me crazy. After a short drive and usually if you accelerate a little harder than normal this starts missing real bad most of the miss fires are on #4 cylinder. The other cylinders have slight miss fires at times. After a short drive and I let i...
January 18, 2010
2005 Chrysler Pacifica 3.5L MIL Lamp on VIN: 2C8GF48415
P0300: Multiple Misfire Detected. ... only, no drivability concerns. Ran codes & only p0300 is present. I noticed in freeze frame data the eng rpm was 251. Using my modis I can monitor misfires. while siting in the bay, at idle,you can watch cyl's 1,3,5 counting misfires(running fine)for a...
January 18, 2010
1999 Saab 9-5 3.0L Poor Idle Quality, Rough Idle VIN: YS3EF48Z3X
P0300: Random Misfire code. ... idle. Car never stalls and drives/performs fine off idle, but the idle is very rough with a P0300 code. It never sets a specific cylinder misfire code. We have replaced many coil packs and spark plugs on Saab's so we used our known good coil packs as subst...
January 18, 2010
2001 Chevrolet Silverado 1500 LT 4.3L Misfire, MIL Lamp on VIN: 1GCEC14W91
P0300: Multiple Cylinder Misfire Detected. We have replace plugs,wires,cap,rotor,dist,crank sensor. When you road test the truck it will set the code as soon as you get to highway speed. The strange thing it shows that it is mising on cyl 4-6 on the scan tool in misfire counts.You cannot tell that it i...
January 19, 2010
2003 Chevrolet Silverado 2500 HD 6.0L Misfire, MIL Lamp on VIN: 1GCHK23U23
P0300: Multiple Engine Misfire Detected. ... a random miss code p0300, It has new wires & cheaper champion plugs, it has had an injector cleaning done. At idle with the Solus scanner it flags random misses at idle & runs just a little rough, it will turn on the ses light if you drive at cruis...
January 19, 2010
1996 Jeep Grand Cherokee Laredo 4.0L Misfire, MIL Lamp on VIN: 1J4G25856T
P0300: Multiple Cylinder Misfire Detected. Hello, I'm trying to help my fellow technician who is having difficulties signing on to his account. We have this 1996 Jeep Grand Cherokee (4.0 4x4) in the shop with an intermittent MIL. The MIL will set after 1-2 days of driving for PO300, PO305 & PO306...
January 20, 2010
1997 Chevrolet C1500 5.0L Misfire VIN: 2GCEC19M4V
P0300: Multiple Cylinder Misfire Detected. This vehicle came in not running. The guy parked it because it ran bad. It's been sitting a couple of years, the plate expired in '08. Started with fuel pump & filter. Gas was varnished and emptied it out. I put in 6 gallons of Chevron 87 grade. Truck star...
January 21, 2010
1999 Chevrolet Express 1500 4.3L Hesitation, Cuts out, Misfire, MIL Lamp on
P0300: Multiple Cylinder Misfire Detected. Customer complain was no power,rough idle,hard to start and idle. We have found numerous faults with this van, 1st, maf code was repaired, problem was with wiring(pigtail plug)replaced plug and wiring. Found 2 defective spark plugs and arcing from ignition wir...
January 22, 2010
2003 Volkswagen Passat GLX 2.8L Misfire VIN: WVWRH63B53
P0300: multiple cylinder misfire. Intermittently cold or hot, feels like one cylinder goes to dead misfire usually right after engine is revved. Plugs seem to be a little fuel fouled, injector service performed, monitored coolant sensor throughout warm up cycle, checked for vacuum leaks, notic...
January 22, 2010
2004 Chevrolet Aveo 1.6L Hesitation, Surge, Misfire, MIL Lamp on VIN: KL1TD62674
P0300: Engine Misfire Detected. Call me a fool but i have read everything on Iatn about this condition and i had the intake and exhuast valves resurfaced! After many trips to a hole in the wall machine shop i decided to take it to another machine shop that told me the valves stem height was ...
January 23, 2010
2005 Toyota Camry 2.4L Misfire, MIL Lamp on
P0300: Multiple Cylinder Misfire Detected. has anyone seen a problem like this. this car have been checked by other two tech. they replaced spark plugs and the coolant temperature senor. of course car is back. now car is under my care. fuel trim when it happens is under 7 percent, it has fuel pressure,...
January 23, 2010
1999 Mercury Grand Marquis GS 4.6L MIL Lamp on VIN: 2MEFM74W5X
P0300: Random cylinder misfire. Customer had no complaints other than CEL on. Ran codes and got the common 171-174 lean both banks. Did the MAF clean, check vacuum leaks, replace PCV,oem part. Checked for vacuum at crankcase with PCV plugged and no negative pressure. Cleared codes, test drov...
January 24, 2010
1998 Chevrolet C1500 WT 4.3L Cuts out, Misfire, MIL Lamp on VIN: 1GCEC14W2W
P0300: Multiple Cylinder Misfire Detected. I am going nuts this is my uncles truck it started a year ago, i check back psi on exhaust, fuel psi, tune all was ok it is very intermitent, somtimes you will be driveing normal and if you hit a big hill 3/4 the way up it will lose power, missfire like you wo...
January 25, 2010
2002 GMC Savana 3500 5.7L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1GTHG35R32
P0300: Multiple Cylinder Misfire Detected. Truck came in with a code P0300. Wet down ignition wires and found that the wires were arching. Replaced the ignition coil , wires, cap, rotor and plugs. Problem code P0300 still excists. Performed cylinder leak down test on effected cylinders ( cyl. 7&4),...
January 25, 2010
2000 Chevrolet Astro 4.3L Cuts out, MIL Lamp on VIN: 1GMDM19W3Y
P0300: Multiple Cylinder Misfire Detected. Gentlemen, This vehicle has a miss when driving with no load or if you rev it up while sittingbut if you brake torque it does not miss at all, missfire is the worst on 3 and 4 but also on 1 2 & 5, wires cap and rotor, coil new. Had a problem with no power ...
January 26, 2010
1997 Lexus LS400 4.0L Excessive Emissions, Misfire, MIL Lamp on VIN: JT8BH28F7V
P0300: Multiple Cylinder Misfire Detected. Hello,I'm stuck w/this lexus,Originally came-in w/codes for entire bank#2 misfires...But running fine w/dropped off+ thru diag,still o.k.,Decided to sell Secondary ign.tune-up Came back next day w/ lite back+ same codes,found cat.on r/s glowing red+ code for f...
January 26, 2010
2002 Audi A6 Quattro Avant 3.0L Misfire, MIL Lamp on VIN: WAUVT64B92
P0300: Multiple Cylinder Misfire Detected. Vehicle came in with the whole right bank misfiring. Found that the intake manifold was leaking on the right bank. Vehicle was also due for a timing belt so both parts were replaced. Vehicle now has a P0341 (camshaft position sensor circuit range/performance) ...
January 28, 2010
2001 Chevrolet Silverado 1500 LS 5.3L Misfire, MIL Lamp on VIN: 2GCEK19T31
P0300: Multiple Cylinder Misfire Detected. Hey guys, I had this 2001 chevy p.u. come in to my shop two days ago with an engine misfire problem. #7 cylinder misses at all engine speeds and temps. It has good fire and compression, the injector does not fire and will not light a noid light. However there ...
January 28, 2010
2000 Hyundai Sonata 2.4L Cuts out, Misfire VIN: KMHWF25S2Y
P0300: Multiple Misfire Detected. ... that knows Hyundai's. This vehichle came in with a miss under load, the customer had put new champion plugs in it-no change. Checked codes, had a p0300-misfire. I read where they now would like to have NGK plugs so I replaced plugs, and checked the wires, ...
January 28, 2010
2002 Nissan murano s awd 3.5L No Start VIN: JN8AZ08W85
P0300: random misfire. Hey guys I have a 05 nissan murano s being tough. I have no spark I have power and ground to coils. I show cranking rpms at 180-190 on nissan consult scan tool the odd thing is I have no rpm on the insrument cluster. I checked power and ground to the crank sen...
January 28, 2010
2002 Audi A6 Quattro Avant 3.0L Misfire, MIL Lamp on VIN: WAUVT64B92
P0300: Multiple Cylinder Misfire Detected. Vehicle came in with the whole right bank misfiring. Found that the intake manifold was leaking on the right bank. Vehicle was also due for a timing belt so both parts were replaced. Vehicle now has a P0341 (camshaft position sensor circuit range/performance) ...
January 29, 2010
2001 Chevrolet S10 ZR2 4.3L Misfire VIN: 1GCCT19W11
P0300: Multiple Engine Misfire Detected. we have replace every part related to this problem and still continu to get a multipul miss fire code but i was told that the timming should read 0 with the scaner connected but its at -13 and i tried reseting timming but it will on change to 40 i can not get ...
January 29, 2010
1996 GMC K1500 Sierra SL 4.3L Excessive Emissions, Poor Idle Quality, Hesitation, Stall, Misfire, Poor Fuel Economy VIN: 1GTEK14W0T
P0300: Multiple Cylinder Misfire Detected. ... this one came to me for a complaint of a poor idle quality.when i went to pull it in the shop i could hardly get the thing to start. i had to hold the accelerator to the floor while cranking to get it to start and razz the heck out of it to clear some fuel...
January 30, 2010
2000 GMC Sierra 1500 SLE 5.3L Excessive Emissions, Misfire, MIL Lamp on VIN: 1GTEC19T8Y
P0300: Multiple Cylinder Misfire Detected. Hello Fellow techs, I have a 2000 GMC sierra pick-up 5.3L with code PO300 random multiple misfire I did compression cyl. test, injectors balance test, and KV. test, I pull out one by one primary ignition coil conector RPMs drops 80 to 100 rpms, excep cyl. # 4 ...
January 30, 2010
2006 GMC Sierra 2500 HD SLE 6.0L MIL Lamp on VIN: 1GTHK29U76
P0300: Multiple Cylinder Misfire Detected. ... this truck a while ago, since that question was posted, I replaced the crank sensor with a GM unit, and performed a crank relearn...Twice. And the problem only got worse. It used to take about a month or more before the SES would return after a code clear,...
January 31, 2010
2006 GMC Sierra 2500 HD SLE 6.0L MIL Lamp on VIN: 1GTHK29U76
P0300: Multiple Cylinder Misfire Detected. ... this problem child here that will set a P0300 code randomly, but runs great. The problem used to occur at 60 mph while cruising, and could take months to reset. Now since I relearned the crank, it occurs at 45 mph while cruising. Now when this truck first ...
January 03, 2010
2006 Chevrolet Express 3500 6.0L Misfire, MIL Lamp on VIN: 1GAHG39U46
P0300: Multiple Cylinder Misfire Detected. ... tp% 10 app% 0 open /closed (closed) st trim 1%---5 lt trim-1%---18 st trim 2%---3 lt trim-2%---12 eng load%--17 map(hg)10.4 coolant F 187 map(v)1.13 map(gm/sec)5.75 veh speed 0 tcs active tcc command(off) tank pressure (v)1.39 baro hg(n/a) idle (550)inj pw...
January 04, 2010
2000 Volkswagen Passat GLS 2.8L MIL Lamp on VIN: WVWVD23B2Y
P0300: Intermittent misfire 16684. I replaced the chain tensioner a few months ago. I TRIPLE checked the timing. I have 16 links between the two marks on the cam that are lined up perfectly with the arrows on the caps when the crank pulley is lined up with the notch on the timing cover and both...
January 04, 2010
2006 GMC Yukon Denali 6.0L Excessive Emissions, Poor Idle Quality, Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on, running extrem rich VIN: IGKFK66U16
P0300: Multiple Cylinder Misfire Detected. hello and thanks in advanced the customer broke down drove this truck in it wont idle on its own you have to hold your foot on the gas pedal , i check code listed above the customer stated this happen all of a sudden the fuel trim has a neg reading -19 and the...
January 05, 2010
2000 Volkswagen Passat GLS 2.8L MIL Lamp on VIN: WVWVD23B2Y
P0300: Intermittent misfire 16684. I replaced the chain tensioner a few months ago. I TRIPLE checked the timing. I have 16 links between the two marks on the cam that are lined up perfectly with the arrows on the caps when the crank pulley is lined up with the notch on the timing cover and both...
January 05, 2010
2002 Chevrolet Impala 3.8L Misfire VIN: 2G1WF55KX2
P0300: Multiple Cylinder Misfire Detected. This vehicle has a misfire at IDLE ONLY on #1 cylinder only after it is hot. Cold start is ok. As soon as the throttle is opened when it is misfiring, it goes away. Long term fuel trim was at 10% and short term was 0. We have performed a motorvac fuel service ...
January 06, 2010
2006 GMC Yukon Denali 6.0L Excessive Emissions, Poor Idle Quality, Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on, running extrem rich VIN: IGKFK66U16
P0300: Multiple Cylinder Misfire Detected. hello and thanks in advanced the customer broke down drove this truck in it wont idle on its own you have to hold your foot on the gas pedal , i check code listed above the customer stated this happen all of a sudden the fuel trim has a neg reading -19 and the...
January 06, 2010
2002 Nissan Quest GLE 3.3L Misfire, MIL Lamp on VIN: 4N2ZN17T02
P0300: Multiple Misfire Detected. Hi techs. I have this Nissan in for misfire & MIL activation. I isolated the fault to # 4 cyl. & amp waveform on the inj fuse showed #4 at 0 amps. Sure enuff, that injector is faulty-open ckt. I called the dealer parts dept. & they want to know whi...
January 06, 2010
2004 Chevrolet Aveo 1.6L Hesitation, Surge, Misfire, MIL Lamp on VIN: KL1TD62674
P0300: Engine Misfire Detected. Call me a fool but i have read everything on Iatn about this condition and i had the intake and exhuast valves resurfaced! After many trips to a hole in the wall machine shop i decided to take it to another machine shop that told me the valves stem height was ...
January 07, 2010
2004 Dodge Ram 1500 Truck SLT 4.7L Excessive Emissions, Stall, Misfire VIN: 1D7HU18N94
P0300: Multiple Misfire Detected. got this truck in and customer said it was running great down the freeway and then started loosing power. customer would accelerate and but could not get over 40 to 45 mph. truck would die sometimes but always restarted. runs like crap. has sever engine misfir...
January 07, 2010
1999 Land Rover Discovery SD 4.0L Poor Idle Quality
P0300: random misfire. Hello, All Land Rover guys I have a big problem with this Discovery High Idle. Vehicle came in with high idle around 2500 to 3000. Changed idle air valve no change... Changed Throttle position sensor No change... Before all this I did smoke test... Nothing Maj...
January 07, 2010
2002 Chrysler Town & Country (Van) LX 3.8L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire, MIL Lamp on VIN: 2C4GP44382
P0300: random missfire. ... engine light on. We started out by replacing the coil pack,plugs,wires,clean fuel injectors. The van ran the same (when it came in it had codes P0172,P0300). We recheked codes and the one trip codes were 300,302,303,172. We re...
January 08, 2010
1999 Land Rover Discovery SD 4.0L Poor Idle Quality
P0300: random misfire. Hello, All Land Rover guys I have a big problem with this Discovery High Idle. Vehicle came in with high idle around 2500 to 3000. Changed idle air valve no change... Changed Throttle position sensor No change... Before all this I did smoke test... Nothing Maj...
January 08, 2010
2001 Volkswagen Jetta GLS 1.8L Hesitation, Cuts out, Misfire VIN: 3VWSD68M11
P0300: random missfire. car looses power under load above 3000rms. feels like a missfire on all cylinders. usually only when cold. will do it for about 30 minutes of constant driving then clear up. it does it whether the mass air flow is plugged in or not. i replaced spark plugs,inst...
January 09, 2010
2001 Volkswagen Jetta GLS 1.8L Misfire, MIL Lamp on VIN: 3VWSD69M21
P0300: random misfire. This vehicle has come is with the same codes 2 times.The maf was replaced & codes cleared and vehicle was good for about 1 month.We reinspected and found the wire harness to the ignition coils cracking.Found bulletin in alldata #04-02 for a wire harness ov...
January 10, 2010
2007 Chevrolet Silverado 2500 HD Classic LT 6.0L Misfire VIN: 1GCHC23U77
P0300: Multiple Cylinder Misfire Detected. When vehicle first came to the shop found misfires on all cyl. Tune-up was done at this time. After tune-up we found cyl 8 continued to miss but only at Idle. ran compression test and fourn cyl 8 low. Did head job and reinstalled head after returning from head...
January 11, 2010
2003 Mazda 6 S 3.0L Hesitation, lacks power VIN: 1YVFP80D63
P0300: Random Misfire Detected. ... with a MIL. found code P0300, stress tested the front 3 coild and found one bad pattern. replaced coil and cleared codes. on road test vehicle lacked power MIL flashed and then came on setting code P0300. I removed the intake and swapped the rear coils wit...
January 12, 2010
2001 Buick Rendezvouz 3.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: 3G5DBO3E12
P0300: Random cylinder misfire. now the car runs bad has a po300 random misfire.my helper for some reason thought he should remove the harmonic balancer could we have upset the air gap for the sensor?
January 13, 2010
2004 Chevrolet Avalanche 1500 5.3L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 3GNEK12T14
P0300: Multiple Cylinder Misfire Detected. Truck is sort of intermittant but it always adds fuel to bank 1, and around 25% at idle though the pulse width looks the same as the other bank. Will sometimes run very well, next time VERY rough idle. Usually, #1 cyl will miss most, and some for #3, but now w...
January 13, 2010
2005 Chevrolet Silverado 1500 5.3L Misfire VIN: 1BGTYUII66
P0300: Multiple Cylinder Misfire Detected. Fuel trim bank 1 is stuck at +25% WITH IGNITION ON and engine off. I have dis-connected battery and tried again, same results. STFT are at 0 on both banks. Plugs are black with soot on bank 1, beautiful on bank 2, cant find any intake leaks from the outside, ...
January 13, 2010
1997 Chevrolet C1500 5.0L Misfire VIN: 2GCEC19M4V
P0300: Multiple Cylinder Misfire Detected. This vehicle came in not running. The guy parked it because it ran bad. It's been sitting a couple of years, the plate expired in '08. Started with fuel pump & filter. Gas was varnished and emptied it out. I put in 6 gallons of Chevron 87 grade. Truck star...
January 14, 2010
2000 Chevrolet Astro 4.3L Cuts out, MIL Lamp on VIN: 1GMDM19W3Y
P0300: Multiple Cylinder Misfire Detected. Gentlemen, This vehicle has a miss when driving with no load or if you rev it up while sittingbut if you brake torque it does not miss at all, missfire is the worst on 3 and 4 but also on 1 2 & 5, wires cap and rotor, coil new. Had a problem with no power ...
January 14, 2010
2004 Ford F-150 XL 4.6L Poor Idle Quality, Misfire VIN: 2FTRX18W34
P0300: random misfire. We have performed a cylinder leakage test as well with less than 10% loss. The vacuum at idle is bouncing around 15-16 inches so we're thinking valve springs but because compression is good and smoke testing indicated no leaks, we're not sure yet. Moving coils...
January 15, 2010
2005 Ford Taurus SE 3.0L Poor Idle Quality, Surge, Melted intake VIN: 1FAFP56275
P0300: random miss. This vehicle cam in with these codes a week ago. Found holes in the intake (melted) where the pcv hose goes into the upper intake. Also noted extremely hot pcv assembly hose. Checked for restricted exaust, checked ok. Replaced intake and pcv heater, and had a ...
January 15, 2010
2008 Mazda RX-8 Sport 1.3L Excessive Emissions, MIL Lamp on VIN: JM1FE17N65
P0300: random misfire. One again we have to ask for help. First thanks for the time to look to my problem. It been sit for 6 months and customer drive and die out on the street. Tow to the dealer with diagnostic bad starter foul spark lug, bad battery. at the shop with jump it start...
January 15, 2010
1999 Pontiac Montana 3.4L Misfire VIN: 1GMDX03E2X
P0300: Multiple Cylinder Misfire Detected. ... kicked down) the MIL lamp flashes and code P0300(muliple misfire) results. Not sure if I can feel misfire though. Misfire history indicates only #1 cylinder misfires(1960 total count). Rev limiter cuts in below 4000rpm only in park or neutral so that's not...
January 15, 2010
1999 Pontiac Montana 3.4L Misfire VIN: 1GMDX03E2X
P0300: Multiple Cylinder Misfire Detected. ... kicked down) the MIL lamp flashes and code P0300(muliple misfire) results. Not sure if I can feel misfire though. Misfire history indicates only #1 cylinder misfires(1960 total count). Rev limiter cuts in below 4000rpm only in park or neutral so that's not...
January 16, 2010
2005 Jeep Grand Cherokee Limited 5.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1J4HR58235
P0300: Multiple Cylinder Misfire Detected. ... a 2005 Jeep Grand cherokee with a 5.7 litre.I had codes of p1417-p0300, cylinder #7 reactivation solenoid and random misfire.I cleared the codes and test drove.At about 35mph the vehicle began to shake and the CEL light b...
January 17, 2010
2006 Chevrolet Monte Carlo SS 5.3L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 2G1WL15C86
P0300: Multiple Engine Misfire Detected. This is driving me crazy. After a short drive and usually if you accelerate a little harder than normal this starts missing real bad most of the miss fires are on #4 cylinder. The other cylinders have slight miss fires at times. After a short drive and I let i...
January 18, 2010
2005 Chrysler Pacifica 3.5L MIL Lamp on VIN: 2C8GF48415
P0300: Multiple Misfire Detected. ... only, no drivability concerns. Ran codes & only p0300 is present. I noticed in freeze frame data the eng rpm was 251. Using my modis I can monitor misfires. while siting in the bay, at idle,you can watch cyl's 1,3,5 counting misfires(running fine)for a...
January 18, 2010
1999 Saab 9-5 3.0L Poor Idle Quality, Rough Idle VIN: YS3EF48Z3X
P0300: Random Misfire code. ... idle. Car never stalls and drives/performs fine off idle, but the idle is very rough with a P0300 code. It never sets a specific cylinder misfire code. We have replaced many coil packs and spark plugs on Saab's so we used our known good coil packs as subst...
January 18, 2010
2001 Chevrolet Silverado 1500 LT 4.3L Misfire, MIL Lamp on VIN: 1GCEC14W91
P0300: Multiple Cylinder Misfire Detected. We have replace plugs,wires,cap,rotor,dist,crank sensor. When you road test the truck it will set the code as soon as you get to highway speed. The strange thing it shows that it is mising on cyl 4-6 on the scan tool in misfire counts.You cannot tell that it i...
January 19, 2010
2003 Chevrolet Silverado 2500 HD 6.0L Misfire, MIL Lamp on VIN: 1GCHK23U23
P0300: Multiple Engine Misfire Detected. ... a random miss code p0300, It has new wires & cheaper champion plugs, it has had an injector cleaning done. At idle with the Solus scanner it flags random misses at idle & runs just a little rough, it will turn on the ses light if you drive at cruis...
January 19, 2010
1996 Jeep Grand Cherokee Laredo 4.0L Misfire, MIL Lamp on VIN: 1J4G25856T
P0300: Multiple Cylinder Misfire Detected. Hello, Iím trying to help my fellow technician who is having difficulties signing on to his account. We have this 1996 Jeep Grand Cherokee (4.0 4x4) in the shop with an intermittent MIL. The MIL will set after 1-2 days of driving for PO300, PO305 & PO306...
January 20, 2010
1997 Chevrolet C1500 5.0L Misfire VIN: 2GCEC19M4V
P0300: Multiple Cylinder Misfire Detected. This vehicle came in not running. The guy parked it because it ran bad. It's been sitting a couple of years, the plate expired in '08. Started with fuel pump & filter. Gas was varnished and emptied it out. I put in 6 gallons of Chevron 87 grade. Truck star...
January 21, 2010
1999 Chevrolet Express 1500 4.3L Hesitation, Cuts out, Misfire, MIL Lamp on
P0300: Multiple Cylinder Misfire Detected. Customer complain was no power,rough idle,hard to start and idle. We have found numerous faults with this van, 1st, maf code was repaired, problem was with wiring(pigtail plug)replaced plug and wiring. Found 2 defective spark plugs and arcing from ignition wir...
January 22, 2010
2003 Volkswagen Passat GLX 2.8L Misfire VIN: WVWRH63B53
P0300: multiple cylinder misfire. Intermittently cold or hot, feels like one cylinder goes to dead misfire usually right after engine is revved. Plugs seem to be a little fuel fouled, injector service performed, monitored coolant sensor throughout warm up cycle, checked for vacuum leaks, notic...
January 22, 2010
2004 Chevrolet Aveo 1.6L Hesitation, Surge, Misfire, MIL Lamp on VIN: KL1TD62674
P0300: Engine Misfire Detected. Call me a fool but i have read everything on Iatn about this condition and i had the intake and exhuast valves resurfaced! After many trips to a hole in the wall machine shop i decided to take it to another machine shop that told me the valves stem height was ...
January 23, 2010
2005 Toyota Camry 2.4L Misfire, MIL Lamp on
P0300: Multiple Cylinder Misfire Detected. has anyone seen a problem like this. this car have been checked by other two tech. they replaced spark plugs and the coolant temperature senor. of course car is back. now car is under my care. fuel trim when it happens is under 7 percent, it has fuel pressure,...
January 23, 2010
1999 Mercury Grand Marquis GS 4.6L MIL Lamp on VIN: 2MEFM74W5X
P0300: Random cylinder misfire. Customer had no complaints other than CEL on. Ran codes and got the common 171-174 lean both banks. Did the MAF clean, check vacuum leaks, replace PCV,oem part. Checked for vacuum at crankcase with PCV plugged and no negative pressure. Cleared codes, test drov...
January 24, 2010
1998 Chevrolet C1500 WT 4.3L Cuts out, Misfire, MIL Lamp on VIN: 1GCEC14W2W
P0300: Multiple Cylinder Misfire Detected. I am going nuts this is my uncles truck it started a year ago, i check back psi on exhaust, fuel psi, tune all was ok it is very intermitent, somtimes you will be driveing normal and if you hit a big hill 3/4 the way up it will lose power, missfire like you wo...
January 25, 2010
2002 GMC Savana 3500 5.7L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1GTHG35R32
P0300: Multiple Cylinder Misfire Detected. Truck came in with a code P0300. Wet down ignition wires and found that the wires were arching. Replaced the ignition coil , wires, cap, rotor and plugs. Problem code P0300 still excists. Performed cylinder leak down test on effected cylinders ( cyl. 7&4),...
January 25, 2010
2000 Chevrolet Astro 4.3L Cuts out, MIL Lamp on VIN: 1GMDM19W3Y
P0300: Multiple Cylinder Misfire Detected. Gentlemen, This vehicle has a miss when driving with no load or if you rev it up while sittingbut if you brake torque it does not miss at all, missfire is the worst on 3 and 4 but also on 1 2 & 5, wires cap and rotor, coil new. Had a problem with no power ...
January 26, 2010
1997 Lexus LS400 4.0L Excessive Emissions, Misfire, MIL Lamp on VIN: JT8BH28F7V
P0300: Multiple Cylinder Misfire Detected. Hello,I'm stuck w/this lexus,Originally came-in w/codes for entire bank#2 misfires...But running fine w/dropped off+ thru diag,still o.k.,Decided to sell Secondary ign.tune-up Came back next day w/ lite back+ same codes,found cat.on r/s glowing red+ code for f...
January 26, 2010
2002 Audi A6 Quattro Avant 3.0L Misfire, MIL Lamp on VIN: WAUVT64B92
P0300: Multiple Cylinder Misfire Detected. Vehicle came in with the whole right bank misfiring. Found that the intake manifold was leaking on the right bank. Vehicle was also due for a timing belt so both parts were replaced. Vehicle now has a P0341 (camshaft position sensor circuit range/performance) ...
January 28, 2010
2001 Chevrolet Silverado 1500 LS 5.3L Misfire, MIL Lamp on VIN: 2GCEK19T31
P0300: Multiple Cylinder Misfire Detected. Hey guys, I had this 2001 chevy p.u. come in to my shop two days ago with an engine misfire problem. #7 cylinder misses at all engine speeds and temps. It has good fire and compression, the injector does not fire and will not light a noid light. However there ...
January 28, 2010
2000 Hyundai Sonata 2.4L Cuts out, Misfire VIN: KMHWF25S2Y
P0300: Multiple Misfire Detected. ... that knows Hyundai's. This vehichle came in with a miss under load, the customer had put new champion plugs in it-no change. Checked codes, had a p0300-misfire. I read where they now would like to have NGK plugs so I replaced plugs, and checked the wires, ...
January 28, 2010
2002 Nissan murano s awd 3.5L No Start VIN: JN8AZ08W85
P0300: random misfire. Hey guys I have a 05 nissan murano s being tough. I have no spark I have power and ground to coils. I show cranking rpms at 180-190 on nissan consult scan tool the odd thing is I have no rpm on the insrument cluster. I checked power and ground to the crank sen...
January 28, 2010
2002 Audi A6 Quattro Avant 3.0L Misfire, MIL Lamp on VIN: WAUVT64B92
P0300: Multiple Cylinder Misfire Detected. Vehicle came in with the whole right bank misfiring. Found that the intake manifold was leaking on the right bank. Vehicle was also due for a timing belt so both parts were replaced. Vehicle now has a P0341 (camshaft position sensor circuit range/performance) ...
January 29, 2010
2001 Chevrolet S10 ZR2 4.3L Misfire VIN: 1GCCT19W11
P0300: Multiple Engine Misfire Detected. we have replace every part related to this problem and still continu to get a multipul miss fire code but i was told that the timming should read 0 with the scaner connected but its at -13 and i tried reseting timming but it will on change to 40 i can not get ...
January 29, 2010
1996 GMC K1500 Sierra SL 4.3L Excessive Emissions, Poor Idle Quality, Hesitation, Stall, Misfire, Poor Fuel Economy VIN: 1GTEK14W0T
P0300: Multiple Cylinder Misfire Detected. ... this one came to me for a complaint of a poor idle quality.when i went to pull it in the shop i could hardly get the thing to start. i had to hold the accelerator to the floor while cranking to get it to start and razz the heck out of it to clear some fuel...
January 30, 2010
2000 GMC Sierra 1500 SLE 5.3L Excessive Emissions, Misfire, MIL Lamp on VIN: 1GTEC19T8Y
P0300: Multiple Cylinder Misfire Detected. Hello Fellow techs, I have a 2000 GMC sierra pick-up 5.3L with code PO300 random multiple misfire I did compression cyl. test, injectors balance test, and KV. test, I pull out one by one primary ignition coil conector RPMs drops 80 to 100 rpms, excep cyl. # 4 ...
January 30, 2010
2006 GMC Sierra 2500 HD SLE 6.0L MIL Lamp on VIN: 1GTHK29U76
P0300: Multiple Cylinder Misfire Detected. ... this truck a while ago, since that question was posted, I replaced the crank sensor with a GM unit, and performed a crank relearn...Twice. And the problem only got worse. It used to take about a month or more before the SES would return after a code clear,...
January 31, 2010