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P0300 Diagnostic Trouble Code Discussion for July 2008

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
2002 GMC Sierra 2500 HD 6.0L Misfire VIN: U72E240745
P0300: Multiple Cylinder Misfire Detected. high milage work/service truck. when first started cold or after sitting hot for a few minutes, engine runs fine at idle. run engine speed up to 3000 rpm-idle and then lose cylinders #1/2/4. induced fuel and verified ignition good, no change. engine vaccum dro...
July 01, 2008
2002 Audi A4 1.8L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: WAULC68E52
P0300: multiple cylinder misfire detected. Hi Guys ! This car drive us nuts for more than a week. The vehicle first came in for random misfire and cyl.2 +4. No problem ! We replace all 4 ign. coils & plugs. Test drive over 5 mls with no complain .Customer picked up car & call back after a week ...
July 02, 2008
2002 Buick Century Custom 3.1L Misfire, MIL Lamp on VIN: 2G4WS52362
P0300: Engine Misfire Detected. i have a random misfire code with mis on #3 cylinder under very light power brake and light cruise. swapped spark plugs, wires, coil, injector. no change. good spark pattern, good injector voltage and amp patterns, weired thing is when you disconnect egr valve...
July 02, 2008
1999 Volkswagen Jetta GL 2.0L MIL Lamp on VIN: 3VWRC29M1X
P0300: Random Misfire. This car consistently sets P0300 code and occasionally it will set a P0302 or P0303 along with it. The only problem the driver noticeses is a slightly rough idle. Monitoring O2 values and fuel trims on a dyno at cruise in shop shows the O2's going lean (.1 to ...
July 03, 2008
2003 Pontiac Sunfire SE 2.2L Misfire VIN: 3G2JB52F13
P0300: Multiple Engine Misfire Detected. Hope some GM tech out there has some help for me with this problem.Has a misfire on cylinders 1&4 that is evident at any light throttle cruise .Most noticeable at 90 to 110 KPH but is also there at city speeds(50-60).Very noticeable when hot.Idle,accelerat...
July 05, 2008
2002 GMC Yukon Denali XL 6.0L Excessive Emissions, Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1GKFK66U42
P0300: Random misfire. This Denali arrived in our shop after customer drove through a large puddle on a city street during a rainstorm. Engine gulped enough water to bend 1+ rods. Vehicle was not submerged, and actually ran long enough to get half a block down the street before dyin...
July 08, 2008
2003 Mercedes-Benz E320 3.2L Hesitation, Stall, VIN: WDBUF65J13
P0300: . This car will intermittently drop cyls 1 2 and 3 turn on CEL for misfire. It will barely have enough power to move the car, and then will suddenly clear up and run fine. My data shows cylinders 123 as negative number on effiecency scale. Cycling the key off an...
July 08, 2008
2006 Saturn Ion-2 2.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G8AN15F66
P0300: Random Misfire Detected. ... but it's kicking me in the head. this saturn has a p0300 that just won't quit. it came in with a noticable misfire at idle and under load. so far we've replaced the plugs, coil boots, coil pack assembly, reflashed the pcm and the miss is gone under load ...
July 12, 2008
2003 Ford Escape XLT 3.0L Misfire VIN: 1FMYU93193
P0300: Random Misfire. Hi folks I have this Escape with two dead cylinder, 4 and 6. I found one other post that had the same problem as I. to me, it sounded like the upper intake was leaking so I replaced the upper and lower intake gaskets. While I had the intake off I started the t...
July 15, 2008
2001 Kia Rio 1.5L Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: KNADC12311
P0300: Random Cylinder Misfire Detected. We got this little gem dropped into our lap last week. The above repairs were done before we go it. The problem is only at idle, the car drives nicely at cruise speed. My scanner talks to it but the sample rate is very slow. It will read about once every 5 to ...
July 15, 2008
1996 Chevrolet C1500 Suburban 5.7L Hesitation, Misfire VIN: 1GNFK16R6T
P0300: Multiple Cylinder Misfire Detected. Help, my own truck is killing me! What started out as a very intermittent glitch that was barely noticeable has turned into cylinders misfiring and the truck still drives but is not much fun to drive anymore. I have mostly cyl. #4 misfiring but they all will d...
July 17, 2008
2002 Chevrolet S10 LS 4.3L Misfire, MIL Lamp on VIN: 1GCDT13W62
P0300: Multiple Engine Misfire Detected. truck came in with a misfire code po304. gave it a complete tune up and it returned 2 days later with same code. bulletins said possible cpi. changed the spider assembly to the newer updated version. all seemed ok at the time checked for misfire counts at idle...
July 17, 2008
2003 Ford Escape XLT 3.0L Misfire VIN: 1FMYU93193
P0300: Random Misfire. Hi folks I have this Escape with two dead cylinder, 4 and 6. I found one other post that had the same problem as I. to me, it sounded like the upper intake was leaking so I replaced the upper and lower intake gaskets. While I had the intake off I started the t...
July 17, 2008
2000 Acura TL 3.2L Surge, Misfire, MIL Lamp on VIN: 19UUA5667Y
P0300: Multiple Misfire Detected. Vehicle has bad miss sometimes under light acceleration. Also at cruising speeds has a slight surge. Replaced all spark plugs with OEM brand and replaced cylinder 1 and 5 ignition coils. Still get a slight miss but cannot get a MIL, even after driving it for 2...
July 18, 2008
2002 Acura MDX 3.5L Excessive Emissions, Hesitation, Misfire, MIL Lamp on VIN: 2HNYD18252
P0300: Random Misfire Detected. Vehicle has intermittent misfire on cylinder #1 and #4; tried new coils-no change. Freeze frame data shows misfire on cylinder #1 at 0 mph-idle. Short term fuel trim at -3.9 percent and long term trim at -4.7 percent. Intermittently you can feel mis-fire at fr...
July 18, 2008
1996 Chevrolet C1500 Suburban 5.7L Hesitation, Misfire VIN: 1GNFK16R6T
P0300: Multiple Cylinder Misfire Detected. Help, my own truck is killing me! What started out as a very intermittent glitch that was barely noticeable has turned into cylinders misfiring and the truck still drives but is not much fun to drive anymore. I have mostly cyl. #4 misfiring but they all will d...
July 18, 2008
2005 Dodge Caravan SXT 3.3L Misfire, MIL Lamp on VIN: 1D4GP25R15
P0300: Multiple Cylinder Misfire Detected. Van came in from local used car dealer with SEL on and rough idle-lot owner said it ran good when he sold it but we have no history-buyer brought back the day after he bought it-the lot owner tried switching injectors with another cylinder-replaced coil pack-w...
July 18, 2008
1997 Chevrolet Tahoe LS 5.7L Misfire VIN: 1GNEC13RXV
P0300: Multiple Cylinder Misfire Detected. Vehicle came in for running bad and misfire. Found pressure regulator leaking (of course) so we replaced injector and we found #4 spark plug fouled with oil to the point that you couldn't see the electrode. We replaced plugs, cap and rotor and now instead of h...
July 21, 2008
2001 Saab 9-5 SE 3.0L No Start VIN: YS3EF48Z01
P0300: random misfire. ... injected to the cylinders. had a weak fuel pump and replaced it with a scantech pump. had 36 psi now have 40 psi with no injection. vehicle has misfire codes: p0300 & p1313 and a knock sensor code please any saab tech. out there need ur help
July 21, 2008
2002 Chevrolet S10 LS 4.3L Misfire, MIL Lamp on VIN: 1GCDT13W12
P0300: Multiple Engine Misfire Detected. ... vehicle thats got me a bit stumped. It came in on the hook due to it was run off the road and into a pond. Water came into the vehicle to the base of the seats (not over) and was hydrolocked. I pulled out the plugs and dried out the cylinders. Drained out ...
July 22, 2008
2005 Chevrolet Monte Carlo LS 3.4L Misfire, MIL Lamp on VIN: 2G1WW12E65
P0300: Multiple Cylinder Misfire Detected. ... complaint of ses light on and does not shift into 4 th gear. perorm scan test found p0300 cylinder miss fire code in system, when monitoring miss fire data on scanner no 6 cylinder misses continuasly. inspected spark plugs, they did not look to bad but rep...
July 22, 2008
1998 Cadillac DeVille 4.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G6KD54Y6W
P0300: Engine Misfire Detected. customer just got this car came in with check engine light on PO300 RANDOM MISFIRE counts on cylinders 1,3,5,7,only at idle smoke test/replaced intake gaskets, unplugged o2 much better result, 2 new o2 sensors misfires return, fuel trims on bank 1 goes neg 15,...
July 23, 2008
2000 GMC Sierra 1500 SL 4.3L Misfire VIN: 1GTEC14W9Y
P0300: Multiple Cylinder Misfire Detected. This truck came to our shop not running. We found good fuel pressure but no volume which lead to the filter. Once volume was corrected the truck would run but not idle and a severe misfife was present. The misfire was intermitantly on 4 cylinders but mostly on...
July 23, 2008
1999 Chevrolet Silverado 1500 4.3L Hesitation, Misfire, MIL Lamp on VIN: 2GCEC19W1X
P0300: Multiple Cylinder Misfire Detected. This truck is sluggish on accel. and misfires at cruise. Iv removed the fuel pump there was slimmy darkgreen stuff on the filter of the pump so I replaced fuel pump and cleaned gas tank. Truck still has 50 psi of fuel pressure at fuelrail and 65 psi at the lin...
July 24, 2008
2002 Chevrolet Silverado 1500 4.3L Misfire, MIL Lamp on, Hard Start VIN: 2GCEC19W82
P0300: Multiple Cylinder Misfire Detected. Came in with hard to start when sets overnightWhen I first checked it had codes for #5 & #6 mis-fire. We cleaned plugs & replaced wire set, Started & ran good with no miss. Let it set overnight & was hard to start when cold, but after start up ...
July 24, 2008
1997 Honda Passport EX 3.2L Excessive Emissions, Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: 4S6CM58V7V
P0300: Random Misfire Detected. I have this vehicle in for a code P0300. When vehicle goes into closed loop the short term fuel trim shoots up to -68 and the longterm follows to -28.9. it continues until it reset to 0 which is when it surges and then idles up and then it starts to climb agai...
July 24, 2008
2003 Isuzu Rodeo S V6 3.2L Misfire VIN: 4S2DM58W53
P0300: Multiple Cylinder Misfire Detected. ... LEAK A MONTH PRIOR. WE HAD REPLACED UPPER INTAKE MANIFOLD GASKET AND INJECTOR O-RINGS. === VEHICLE COMES BACK A MONTH LATER WITH CODES P0300-P1312 & P1626.WHEN DUPLICATING MISFIRE PROBLEM OUR MISFIRE COUNTER(ON TECH ...
July 24, 2008
2002 Jaguar X-Type 3.0L Hesitation, Misfire VIN: SAJEA51C62
P0300: random multiple misfire detected. terrible hesitation upon acceleration due to misfires of cyl. 1 3&5. replaced fuel filt. that was stopped up, air filt. that was dirty and spark plugs that looked good (al 6 looked good). car runs good as long as you drive gently but on heavy or simi heavy...
July 24, 2008
1999 Ford Escort ZX2 Hot Coupe 2.0L MIL Lamp on VIN: 3FAKP1138X
P0300: random missfires. Vehicle came into shop running hot pushing coolant out of overflow and mil light flashing. I have replaced thermostat but have not run vehicle yet. Im trying to diagnose po302, po303, po300. Mil starts flashing after vehicle warms up. It does not seem to have ...
July 25, 2008
2001 Mercedes-Benz ML320 3.2L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 4JGAB54E41
P0300: Random Misfire. This ML320 has a rough idle and sometimes hesitation on acceleration from a stop . At cruise or WOT there are no problems and seems to have good power . Most times it has a notable miss / rough idle which varies in degree . The truck was supposedly sitting for...
July 26, 2008
1997 Honda Passport EX 3.2L Excessive Emissions, Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: 4S6CM58V7V
P0300: Random Misfire Detected. I have this vehicle in for a code P0300. When vehicle goes into closed loop the short term fuel trim shoots up to -68 and the longterm follows to -28.9. it continues until it reset to 0 which is when it surges and then idles up and then it starts to climb agai...
July 29, 2008
2001 Audi S4 Avant 2.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: WAURD68D71
P0300: Random Misfire. I work at a used car dealer and inherited this audi s4. Has misfire at idle. Runs great over 3000RPM. Compression drops to 75 PSI when misfiring all other cylinders 175psi. Tryied Motorvac, plugs, and coils prior to compression checks. Not sure of service hist...
July 30, 2008
1999 Buick Century Limited 3.1L Misfire VIN: 2G4WY52M2X
P0300: Multiple Engine Misfire Detected. ... with an interment misfire. It sets p0300 only, and when I go back through the miss history I see cyl #2. It never sets p0302! The miss usually happens on acel up a hill hot in 4th with tcc locked. I have switched module and coil pack, plugs and wires, inje...
July 30, 2008
1999 GMC Safari SL 4.3L Misfire VIN: W3XB511098
P0300: Multiple Cylinder Misfire Detected. this van has been to another shop for an lower intake gasket.customer got van back running bad. customer found dist.out of sync. replaced dist.,cap ,wires,and plugs. runs better but has miss on cyl. #4 . only at 50 to 70% load. now this mess is mine. i checked...
July 30, 2008
2000 Volkswagen Jetta GL 2.0L Poor Idle Quality, Hesitation, Cuts out, Stall, MIL Lamp on VIN: 3VWRC29MOY
P0300: Multiple Cylinder Miss-fire. VW Techs- Subject vehicle was in storage for a number of months. It was brought to us for brakes and the like. It ran fine when it was brought to us, but as we were repairing inspection items, it started running poorer and poorer, until it just can't be driven...
July 30, 2008
1996 Dodge Neon High Line 2.0L MIL Lamp on VIN: 3B3ES47C0T
P0300: Multiple Cylinder Misfire Detected. I get this code when I drive on the highway above 50 m/h I dont get it in the city. The PCM monitor O2 sensors not ready and cat not ready too. but the EGR is ready, some time the O2 become ready.engine run's fine, most of the time when the engine is hot it is...
July 31, 2008