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P0300 Diagnostic Trouble Code Discussion for June 2006

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
1999 Chevrolet Silverado 1500 5.3L MIL Lamp on VIN: 2GCEK19T2X
P0300: Multiple Cylinder Misfire Detected. ... Cleaned Injectors and still had miss. Move injector 7 over to 5 and #5 started missing. Replace injector and thought problem was solved. At idle it shows no misfire but just slightly off idle it starts showing multiple misfire. Random misfire. Found Tsb on...
June 01, 2006
1996 Mercedes-Benz C280 2.8L MIL Lamp on VIN: WDBHA28E5T
P0300: Random misfire 200. I M/B tech, Customer states check eng. light on & fuel gauge intermittent on/off. Checked Alldata & Mitchell but found no realy description to check above codes. We checked wiring harness, it looks Ok. Any body has had any related problem.? Please help...
June 04, 2006
1997 Chevrolet K1500 Suburban 5.7L MIL Lamp on VIN: 3GNFK16R6V
P0300: Multiple Cylinder Misfire Detected. This Chevy has had this problem since It was purchased from a used car lot and has been to several shops, including the dealer. It runs well until a hard pull is needed, as in towing a trailer uphill or climbing a grade. When I started checking codes it had a ...
June 08, 2006
1999 Saab 9-5 2.3L Excessive Emissions, Poor Idle Quality, Cuts out, Stall, Misfire, MIL Lamp on VIN: YS3ED48E4X
P0300: Random Misfire. ... OBD for codes, P0300, p1300, p0340. No crank sensor signal, replaced sensor, No TPS signal, Replaced Throttle body (can't buy TPS separately) Replaced Bosch for NGK plugs Swapped out known good I...
June 09, 2006
1999 Chevrolet Blazer 4.3L Poor Idle Quality, Misfire VIN: 1GNCP18W2X
P0300: Multiple Cylinder Misfire Detected. THANKS IN ADVANCE FOR THE HELP. CUSTOMER BROUGHT CAR IN WITH CHECK ENGINE LIGHT ON AND RUNNING VERY ROUGH, WOULD NOT ACCELLERATE WELL OVER HALF THROTTLE. NOT VERY MUCH REPAIR HISTORY ON VEHICLE SO STARTED WITH REPLACING CAP, ROTOR, PLUGS, WIRES. FINISHED THAT ...
June 10, 2006
2003 Cadillac DeVille 4.6L Poor Idle Quality, Misfire VIN: 1G6KD54Y43
P0300: Engine Misfire Detected. ... codes p0171,p0174,p0300,p1574 present. replaced spark plugs and boots, bg induction. car idled great. test drive recreated miss. no codes stored, miss fired over 300 times in a short time. every cylinder miss fire has a differant count ranging from 48 to 3...
June 12, 2006
1997 Chevrolet S10 4.3L Misfire, MIL Lamp on VIN: 1GCCS19X0U
P0300: Multiple Engine Misfire Detected. The truck now has a multiple cylinder misfire that only becomes noticable when your going highway speed under light load. Just a fish bite kind of thing and maybe once in a while it gets bad enough to make the check engine light flash. Can not brake torque it ...
June 12, 2006
2001 Mazda Protege LX 2.0L Misfire, MIL Lamp on VIN: JMIBJ22631
P0300: Multiple Misfire Detected. Hello everyone, I have This car with the random misfire have done all the obvious) Custome would take car and return within A week with same problem. We Have had so much rain when this problem has been happening that I thought Moisture getting into something....
June 12, 2006
1997 Buick Skylark Limited 2.4L Poor Idle Quality, Cuts out, Misfire, MIL Lamp on VIN: 1G4NJ52T3V
P0300: Multiple Cylinder Misfire Detected. Okay. I need help. This car was brought in on the hook. Customer stated that he had ben on open highway for about 10 minutes, slowed down to 45mph to pass through a neihboring town and when he went to accelerate back up to speed the car started to shake violen...
June 13, 2006
1996 Chevrolet Blazer 4.3L Misfire VIN: 1GNDT13W3T
P0300: Multiple Cylinder Misfire Detected. hi fellow tech's. ty in advance for your help i have the infamous 4.3 s-10 with the ever so popular po300. tech 2 show cam offset -17. removed dist gear was worn no shaft play and cmp sensor looked ok and seemed to test ok.replaced gear popped it back in still...
June 13, 2006
2001 GMC Savana 2500 5.0L Poor Idle Quality VIN: 1FTGG25M11
P0300: Multiple Cylinder Misfire Detected. ... these 2 codes I have never seen the P0507 code and I was wondering if anyone else has ever seen it and what do I need to do to repair the vehicle. The random misfire code I am suspecting that the vehicle needs plugs and wires as the rotor and cap are new. ...
June 15, 2006
2002 Nissan Altima 2.5L MIL Lamp on VIN: 1N4AC11D32
P0300: Multiple Misfire Detected. P0300 (Multi Random Misfires)popping every once in a while. Car runs very well when warmed up. The cold idle as been observed to be a bit rough at times. The freeze frame is as follows. RPM 1850, Fuel Sys CL Coolant 113 F St Trim -1.6, Lt Trim -1.6 Speed ...
June 15, 2006
1996 Chevrolet Blazer 4.3L Hesitation, MIL Lamp on VIN: 1GNDT13W7T
P0300: Multiple Cylinder Misfire Detected. vehicle will crank but not start when cold. i have to spray a little bit of starting fuel to get it started. also upon hard acceleration vehicle hesitates and mil is flashing. pulled code po300--random missfire detected . unfortinately good fuel gauge is not a...
June 16, 2006
1999 Volkswagen Jetta GLS 2.0L No Start VIN: 3VWSA29M4X
P0300: General misfire. The car was towed in. No power coming to the fuel pump. I checked for power at the blue/red wire at the fuel pump while cranking and got 0 power. I jumped fused 12 volts from the battery to blue/red wire. It blew the 15 amp fuse and did not work. I replaced th...
June 16, 2006
1996 Chevrolet Blazer 4.3L Hesitation, MIL Lamp on VIN: 1GNDT13W7T
P0300: Multiple Cylinder Misfire Detected. vehicle will crank but not start when cold. i have to spray a little bit of starting fuel to get it started. also upon hard acceleration vehicle hesitates and mil is flashing. pulled code po300--random missfire detected . unfortinately good fuel gauge is not a...
June 17, 2006
2001 Buick Century Custom 3.1L Surge, Misfire, MIL Lamp on VIN: 2G4WS52J71
P0300: Engine Misfire Detected. ... year ago on this vehicle because intake manifold gasket was leaking into cylinder. Today vehicle came back for multiple problems. Customer complain vehicle misfire during accleration, lost of power, and delayed shifting. I confirm all of customer's symptom...
June 19, 2006
1999 Infiniti QX4 3.3L MIL Lamp on VIN: JNRARO5Y4X
P0300: Multiple Misfire Detected. hay there guys.. have this car here with a po300 code, checked injecters as in ohm readings(13.6)on all 6 performed on car injecter cleaning, no help checked for vac leaks and found bad intake gasket on bank 2, on close inspection seems like intake was machine...
June 19, 2006
2003 Mazda Protege DX 2.0L Poor Idle Quality, Misfire VIN: JHTB589734
P0300: Multiple Misfire Detected. This is one of our used cars.It just barely ran when it came in.We changed the plugs first,they were fouled really bad,still ran like sh*t. Checked fuel press. 38 psi,repl injectors with known good, MAF meter,ign coils and wires all with known good parts.The v...
June 19, 2006
2001 Buick Century Custom 3.1L Surge, Misfire, MIL Lamp on VIN: 2G4WS52J71
P0300: Engine Misfire Detected. ... year ago on this vehicle because intake manifold gasket was leaking into cylinder. Today vehicle came back for multiple problems. Customer complain vehicle misfire during accleration, lost of power, and delayed shifting. I confirm all of customer's symptom...
June 20, 2006
1999 Chrysler Concorde LXi 3.2L Cuts out, Stall, MIL Lamp on VIN: 2C3HD46J8X
P0300: Multiple Cylinder Misfire Detected. This one has got me stumped. Car starts and runs fine for about an hour to an hour and a half. While driving at highway speeds, engine will start to miss fire and set a misfire code, then die. After waiting for a half hour the car will restart and run perfectl...
June 20, 2006
2001 GMC Savana 2500 5.0L Poor Idle Quality VIN: 1FTGG25M11
P0300: Multiple Cylinder Misfire Detected. ... these 2 codes I have never seen the P0507 code and I was wondering if anyone else has ever seen it and what do I need to do to repair the vehicle. The random misfire code I am suspecting that the vehicle needs plugs and wires as the rotor and cap are new. ...
June 20, 2006
2001 Jeep Wrangler Sport 4.0L Misfire, MIL Lamp on VIN: 1J4FA49SX1
P0300: Multiple Cylinder Misfire Detected. Truck came in with erratic oil pressure and clicking lifters. We verified the oil pressure with a mechanical guage and replaced the oil pump. The pump pickup was plugged and the pan full of dark brown sludge. Oil pressure improved but lifters still clicked. Cu...
June 20, 2006
1997 Buick Skylark Limited 2.4L Poor Idle Quality, Cuts out, Misfire, MIL Lamp on VIN: 1G4NJ52T3V
P0300: Multiple Cylinder Misfire Detected. Okay. I need help. This car was brought in on the hook. Customer stated that he had ben on open highway for about 10 minutes, slowed down to 45mph to pass through a neihboring town and when he went to accelerate back up to speed the car started to shake violen...
June 21, 2006
1997 Chevrolet Cavalier LS 2.2L Excessive Emissions, Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1G1JF5243V
P0300: Multiple Engine Misfire Detected. This car is over fueling. It is loading up so bad that it will miss at idle. The o-2 stays at .9 most of the time untill the short term get to about -34%. Then it tries to switch rich- lean. This car has no test port for fuel presure test. I thought it was lea...
June 21, 2006
1999 Chrysler 300M 3.5L No Start, Cuts out VIN: 2C3HE66G4X
P0300: Multiple Cylinder Misfire Detected. ... hour, to good and hot before it will quit. It then will not start until it cools off (seems like anyway)The car will start by the time it gets to me. When it starts it acts like it is loaded with gas the way it stumbles and smoke for a second or 2. The onl...
June 23, 2006
2001 Chevrolet Impala 3.4L Poor Idle Quality, Misfire VIN: 2G1WF55E71
P0300: Multiple Cylinder Misfire Detected. First of all thanks to anyone who takes the time to read and reply to this post. I am at my wits end on this one. This car has a misfire at idle and at steady cruise only. Ltft is -10 to -15% when this miss ocuurs if you put car into open loop with the tech2 m...
June 26, 2006
2001 Jeep Wrangler Sport 4.0L Misfire, MIL Lamp on VIN: 1J4FA49SX1
P0300: Multiple Cylinder Misfire Detected. Truck came in with erratic oil pressure and clicking lifters. We verified the oil pressure with a mechanical guage and replaced the oil pump. The pump pickup was plugged and the pan full of dark brown sludge. Oil pressure improved but lifters still clicked. Cu...
June 26, 2006
2001 Chevrolet Impala 3.4L Poor Idle Quality, Misfire VIN: 2G1WF55E71
P0300: Multiple Cylinder Misfire Detected. First of all thanks to anyone who takes the time to read and reply to this post. I am at my wits end on this one. This car has a misfire at idle and at steady cruise only. Ltft is -10 to -15% when this miss ocuurs if you put car into open loop with the tech2 m...
June 27, 2006
2001 Dodge Stratus SE 3.0L Hesitation, Misfire, MIL Lamp on, P0300 VIN: 4B3AG42HX1
P0300: Multiple Cylinder Misfire Detected. ... engine light on,faults were p0300 and o2 sensor fault. replaced cap and rotor and o2 sensor, fault p0300 returned. cust states vehicle hesitates/misfires when vehicle is mainly cold. vehicle has had numerous items replaced by both dealer and by usas menti...
June 27, 2006
2003 Chevrolet Silverado 2500 HD 6.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2GCEK19U03
P0300: Multiple Engine Misfire Detected. This truck misses heavy on cyl#3 and #4. we have scoped the ignition and coils and injectors, all look normal. we swapped 2 plugs, wires, injectors(not plugged at all). To no avail i can not find out what is causing this miss at idle. It runs perfect on the hi...
June 28, 2006
2003 Mercury Grand Marquis LS 4.6L Misfire VIN: 2MEFM75W13
P0300: Random Cylinder Misfire. ... bucking under load. Will also do it in the bay under load. Scanner shows only P0300 as far as codes but Mode-6 shows misfire counts on all but three cylinders! One thing we did discover was however that when you unplug the EGR valve vacuum hose the car wil...
June 28, 2006
2000 Volkswagen Passat GLS 2.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: WVWCD23B9Y
P0300: multiple cyl misfire. ... work that they did was: recondition heads, timing belt, tensioner, waterpump and sparkplugs. the problem is that the engine light in on and its misfiring. engine codes are: p1340, p0300, p0301,...
June 28, 2006
1996 Buick Century Custom 3.1L Hesitation, Surge, Cuts out, Misfire VIN: 1G4AG55M6T
P0300: Multiple Engine Misfire Detected. This one cuts out and misfires under accel and heavy cruise, but only under 1200 rpm. Sets the listed codes intermittently. NOTE: This car is fixed and is being added to the database die to the strangeness of the problem and the mass potenetial for problems i...
June 29, 2006
2000 Cadillac Catera 3.0L No Start, Cuts out VIN: WO6VR54R5Y
P0300: Multiple Cylinder Misfire Detected. Hello to all. I am having a difficult time with a 2000 catera. Here it is in a nut shell. Itermittently more so hot the car will stall and not restart until it cools off. Also if i turn it off after running in my bay it somtimes may not start. Ther is no check...
June 29, 2006
2003 Mercury Grand Marquis LS 4.6L Misfire VIN: 2MEFM75W13
P0300: Random Cylinder Misfire. ... bucking under load. Will also do it in the bay under load. Scanner shows only P0300 as far as codes but Mode-6 shows misfire counts on all but three cylinders! One thing we did discover was however that when you unplug the EGR valve vacuum hose the car wil...
June 29, 2006
2002 Mitsubishi Galant ES 3.0L Misfire VIN: 4A3AA46H32
P0300: Random Misfire Detected. 2002 Mitsubishi Galant ES 3.0L V6 Hello all, Yesterday this car came in with an occasional light buck/miss at cruise speed. We installed spark plugs, wires, cap and rotor. We also installed valve cover gaskets due to #1 and #2 oil weep in plug holes. When we...
June 29, 2006
1998 BMW 540i 4.4L Misfire, MIL Lamp on VIN: WBADE5326W
P0300: multiple misfire. hELLO BMW TECHS. THIS VEHICLE CAME WIHT THE CHECK ENGINE LIGHT ON. FOUND MISFIRE CODES ON #8 AND #2 CYLS. ROAD TESTED CAR STARTED MISFIRE AT 45MPH @ [...] IN 3rd GEAR. TOOK ENGINE COVERS FOUND WATER AND CORROSSION @ SAPRK PLUG HOLES CLEANED HOLES REPLACED SPAR...
June 30, 2006
2002 Chevrolet Suburban 1500 LT 5.3L Misfire, MIL Lamp on VIN: 1GNFK16Z42
P0300: Multiple Cylinder Misfire Detected. ... Z engine Suburban thats giving us some problems. This vehicle will put a mil on when coasting downhill on highway. Code P0300 present when scanning vehicle. Most missfires are occurring on #2,3,4 and 7. Occassionally we will see missfires on all cylinders....
June 30, 2006