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P0300 Diagnostic Trouble Code Discussion for December 2006

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
2001 Nissan Pathfinder LE 3.5L Misfire, MIL Lamp on VIN: JN8DR07Y31
P0300: Multiple Misfire Detected. Vehicle has a P0300 stored with check engine light on.Has an intermittant skip.When i first checked it for skip cyl.#4 was not working.Pulled coil and plug.Fired coil on the bench seemed ok.Plugs were worn bad.Replace spark plugs and recheck.Now it seems like ...
December 01, 2006
1997 Chevrolet S10 LS 2.2L No Start VIN: 1GCCS1942V
P0300: Multiple Engine Misfire Detected. Good day GM Techs! I have a S10 pickup with a cranks, no start condition. Has good spark. No fuel pressure. When I hook up the fuel pump check connector, the pump runs and vehicle fires right up. OK, my question is, what does the ECU look at to determine if i...
December 04, 2006
2003 GMC Sierra 1500 SLE 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2GTEK19T23
P0300: Multiple Cylinder Misfire Detected. GM misfire diagnosis - easy right? This one has my tech stumped. The customer came in asking for a fuel pressure test as he thought he had a bad pump - he said that ever since he ran it out of gas the truck has run rough. Pressure was within spec & engine ...
December 05, 2006
1997 Mercury Grand Marquis GS 4.6L Misfire VIN: 1MELM75WXV
P0300: Random Misfire. ... cylinders intermintently. Hot or cold. It is most noticable at lower throttle position. At steady cruise it seems worse because of convertor lockup. It also will miss a little at idle. My scanner reads misfire counts and all cylinders are affected. I keeps...
December 05, 2006
1997 Chevrolet Camaro 3.8L Stall, Misfire VIN: 2G1FP22KXV
P0300: Multiple Engine Misfire Detected. this camaro belongs to one of my cousins, it will quit intermitently, it has only quit for us once while making a left turn, it is recording random missfires on all cyl, but just a few at a time[3-4] also, technician Ron said that the m,a,f, shows 300+ grams p...
December 06, 2006
1999 Volkswagen EuroVan MV 2.8L Misfire, MIL Lamp on VIN: WV2MH2701X
P0300: random mis fire. this ones kicking my a"" i have looked over this one real close and can find the problem. i have replaced the coil pack.injector.plugs wires fuel filter compleate tune and still have the problem on hard axcell some times it misfires and set the light p...
December 06, 2006
2000 Dodge Dakota 3.9L MIL Lamp on VIN: 1B7GG22X1Y
P0300: Multiple Cylinder Misfire Detected. all detailed above, thanks.
December 07, 2006
2001 Kia Sportage 2.0L Misfire, MIL Lamp on VIN: KNDJB72371
P0300: Random Cylinder Misfire Detected. hellow and happy holidays to all, got this sportage that came in with a misfire and a blinking mil lamp. felt like it was misfireing on 2 cylinders. pulled codes and had misfire codes for cylinders 2 & 3 as well as a random misfire code. as always didnt ha...
December 07, 2006
1999 Chevrolet Camaro 3.8L Poor Idle Quality, Cuts out, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 2G1FP22K3X
P0300: Multiple Engine Misfire Detected. Came in with check engine lite. # 3 misfire, O2 rich. At first no communication with scanner and ECM . Found a blown fuse for ECM. Scan and ECM communicate. After clearing codes the rich O2 never returned, but now I have a random misfire then settles into # 3 ...
December 08, 2006
1997 Cadillac Seville SLS 4.6L Stall VIN: 1G6KS52Y4V
P0300: Engine Misfire Detected. ... caddy, my customer bought it used a couple of months ago. We dis a tune up, oil change etc.. whenhe bought it. recently he is complaining of an idle stall that seems to happen after it has benn raining, but I only saw it happen once, after warmup on a dry ...
December 11, 2006
1997 Chevrolet Blazer 4.3L Poor Idle Quality, Misfire VIN: 1GNDT13W2V
P0300: Multiple Cylinder Misfire Detected. i have a 97 s blazer that has miss fire on #4. fuel inj ballance test ok. spark ok. comp ok. any help??? thanks
December 11, 2006
2003 Mazda Protege DX 2.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: JM1BJ2255X
P0300: Multiple Misfire Detected. ... MOTHERS CAR. CAME IN WITH CHECK ENGINE LIGHT ON. CODE P0300 MUTIPLE CYLINDER MISFIRE. CHECKED EVERYTHING UNDER THE SUN ie. COIL PACKS, COMPRESSION, MAF VOLTS. I NOTICED ON INITIAL TEAR DOWN THAT #2 COIL PLUG BOOT LOOKED RUSTED LIKE CONDENSATION GOT DOWN IN...
December 11, 2006
1999 Oldsmobile Alero GL 2.4L Poor Idle Quality, Stall, Misfire VIN: 1G3NL52T1X
P0300: Multiple Cylinder Misfire Detected. ... morning compaining of a rough idle. pulled codes and found p0300. replaced plugs and boots. no change. had a known good coil/module assembly in house and installed it. no change. called customer to find out details of problem and found out it started after...
December 11, 2006
2002 Pontiac Grand Prix GT 3.8L Hesitation, Misfire, MIL Lamp on VIN: 1G2WP12K22
P0300: Multiple Cylinder Misfire Detected. Help guys, this one has me stumped. Vehicle was towed in with misfire and lack of power. Has a PO300 code in it. Vehicle starts and idles great. When you try to accelerate vehicle just falls on it's face and will not rev up. After you push the accelerater furt...
December 12, 2006
2002 Saturn L200 2.2L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 1G8JU54F02
P0300: Random Misfire Detected. runs very rough at idle, with multiple codes as listed, excellent over the road. lt and st fuel trims are both negatives, engine load shows in the 40% at idle, map is 3.6+ volts at idle. found no vac leaks. car thinks it is under load? at idle. excellent compr...
December 12, 2006
2002 Buick Regal LS 3.8L Hesitation, Surge, Stall, Misfire, MIL Lamp on, HARD START VIN: 2G4WB55K62
P0300: Multiple Engine Misfire Detected. this regal runs like your pulling a truck behind you when going down the road, at idle it wont run unless you have your foot on the gas and it starts hard mean while the whole time its running its bucking and skipping.snap on scanner shows that every cylinder ...
December 13, 2006
1996 Chevrolet Cavalier Z24 2.4L Misfire, MIL Lamp on VIN: 1G1JF12T5T
P0300: Multiple Engine Misfire Detected. ... second shop to actually see this vehicle, and has a misfire on cylinders 1 and 3. It is a quad 4 engine. They tend to call us here for help in diagnosing some of thier troubles before eventually sending a vehicle to us. Since we are so busy at the moment w...
December 13, 2006
2000 Pontiac Sunfire SE 2.2L Misfire VIN: 1G2JB1245Y
P0300: Multiple Engine Misfire Detected. When we got the car, it still had a P0303 and missfired through rpm ranges. Tested systems, HC was found in cooling system. Cyl. head was warped. Head was machined and new gaskets installed. After that repair car missfires on #4 cyl. Comp. counts missfires onl...
December 13, 2006
2002 Saturn L200 2.2L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 1G8JU54F02
P0300: Random Misfire Detected. runs very rough at idle, with multiple codes as listed, excellent over the road. lt and st fuel trims are both negatives, engine load shows in the 40% at idle, map is 3.6+ volts at idle. found no vac leaks. car thinks it is under load? at idle. excellent compr...
December 13, 2006
2002 Buick Regal LS 3.8L Hesitation, Surge, Stall, Misfire, MIL Lamp on, HARD START VIN: 2G4WB55K62
P0300: Multiple Engine Misfire Detected. this regal runs like your pulling a truck behind you when going down the road, at idle it wont run unless you have your foot on the gas and it starts hard mean while the whole time its running its bucking and skipping.snap on scanner shows that every cylinder ...
December 14, 2006
2001 Oldsmobile Aurora 4.0L MIL Lamp on
P0300: Multiple Cylinder Misfire Detected. hello all, This car came from the body shop today with the check engine light on.The car was hit hard on the right front.The car runs fine.I have cleared the codes and syncronized the crank sensors.the misfire come back instantly on cyls 2,3,5,and 8.They are ...
December 14, 2006
1997 Chevrolet Camaro 3.8L Stall, Misfire VIN: 2G1FP22KXV
P0300: Multiple Engine Misfire Detected. this camaro belongs to one of my cousins, it will quit intermitently, it has only quit for us once while making a left turn, it is recording random missfires on all cyl, but just a few at a time[3-4] also, technician Ron said that the m,a,f, shows 300+ grams p...
December 15, 2006
1999 Isuzu Rodeo LS 3.2L Misfire, MIL Lamp on VIN: 4S2CM58W6X
P0300: Multiple Cylinder Misfire Detected. We have a misfire on cylinder #6. We have perfromed: spark test, swap coil, swapped plugs, swapped injectors, watch injectors spray, looked at all wires for injectors and coils as other posts suggested, took compression on all 6 cylinders both cranking and run...
December 15, 2006
1997 Pontiac Bonneville SE 3.8L Hesitation, Misfire, MIL Lamp on VIN: 1G2HZK7VH2
P0300: Engine Misfire Detected. Here a good one guys...Car came in surging idle and misfire and lean code. Car has new plugs, wires, fuel filter, pcv,and ignition module. Intake Of Course... was leaking around the egr tube surprise... Now the car is only misfiring on the front 3 cylinders. F...
December 15, 2006
1996 Chevrolet S10 LS 2.2L Misfire VIN: 1GCCS1946T
P0300: Multiple Engine Misfire Detected. This vehicle was brought in with No. 4 injector leaking gas. Put No. 4 injector in, was leaking fuel out, so I replaced it. The customer called me a week later, said the truck was missing at idle, and runs down the highway fine. I've checked the fuel pressure ...
December 16, 2006
2000 BMW 323i 2.5L Poor Idle Quality, Hesitation, Surge, Misfire, MIL Lamp on VIN: WBAAM3341Y
P0300: random misfire. ONCE THE VEHICLE WARMS UP VERY SLIGHT MIS STILL EXISTS, BUT DURING WARMUP PROCESS STEADY MISFIRES AND CHECK ENGINE LIGHT COMES ON. i HEAR A VACCUUM LEAK, BUT CAN NOT FIND IT. i SOUNDS LIKE A CARCKED INTAKE MANIFOLD.
December 17, 2006
1995 Mercury Grand Marquis LS 4.6L Misfire, MIL Lamp on VIN: 2MELM75W7S
P0300: random cylinder misfire. ... car came in with a check engine light and running rough, p0300 was stored as a memory code and no current codes found. Felt like secondary ignition misfire, knowing plug wires are common problems. I found #3 plug wire had ...
December 19, 2006
1996 Chevrolet S10 LS 2.2L Misfire VIN: 1GCCS1946T
P0300: Multiple Engine Misfire Detected. This vehicle was brought in with No. 4 injector leaking gas. Put No. 4 injector in, was leaking fuel out, so I replaced it. The customer called me a week later, said the truck was missing at idle, and runs down the highway fine. I've checked the fuel pressure ...
December 20, 2006
2002 Chevrolet Avalanche 1500 5.3L Misfire, idle VIN: 3GNEK13T82
P0300: Multiple Cylinder Misfire Detected. solid number 8 misfire at idle occasionally underload passes all tests... swapped injectors coils plugs etc. saw small sign of coolant on intake valve after intake removed. Cranking compression ok intake ok...
December 21, 2006
1996 Volkswagen Jetta GL 2.0L No Start VIN: 3VWRA81H5T
P0300: random misfire. from the very begining, this vehicle would have a difficult time starting. it would just crank for an extended amount of time and eventually start and run. when it ran and you got on it, you could definitely feel a miss. ever since i replaced the cap and rotor...
December 27, 2006
2003 Ford E-250 4.2L Poor Fuel Economy, MIL Lamp on VIN: 1FTNS24253
P0300: misfire detected. ... above the van was good for aprox. 350 miles. Then the MIL came back on with all the same codes excluding the p0300 misfire code. I performed this TSB with care, properly tourging bolts in sequence and cleaning sufaces perfect...
December 29, 2006