Join Now
International Automotive Technicians Network

P0300 Diagnostic Trouble Code Discussion for February 2005

Multiple Misfire Detected


Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P0300
Help Request Posted
1997 Chevrolet Blazer 4.3L Misfire, MIL Lamp on VIN: 1GNDT13WOV
P0300: Multiple Cylinder Misfire Detected. the engine show constent misfire on cyl. #3 has 150 compression has good spark have replaced fuel pressure reg. and return fuel line when truck came in it had 75# fuel pressure not sure how long customer drove like that replaceing return line fix high fuel pre...
February 01, 2005
2003 Ford Ranger Edge 3.0L Misfire VIN: 1FTYR10U73
P0300: Random Misfire Detected. Engine runs great while driving, misfires & shakes at stoplights. I suspect valves as compression is lower than expected but I am confused as #5 has better compression than #3 but misfire monitor never tags #3. So now I am wondering if I am overlooking som...
February 01, 2005
1999 Mercedes-Benz E320 4Matic 3.2L Misfire VIN: WDBJH82F7X
P0300: ramdom misfire. Calling all Mercedes experts: I try to stay away from these because I see so few. The car is a 1999 320 4x4 wagon. We got a call from Bob over a month ago; he had just come from the dealer with an estimate for 6500 cocos for an AC repair. He asked my wife if ...
February 03, 2005
1996 Audi A4 2.8L Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: WAUEA88D3T
P0300: misfire multiple cyls. ... most cylinders, or running extremely lean. I don't own an emissions mashine yet to verify the lean mix. First I pulled faults,it gave me a p0300 and po302, that was easy, sprayed the wires and coil with fine water mist, an...
February 05, 2005
1997 Chevrolet Malibu 3.1L Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1G1ND52M4V
P0300: Multiple Cylinder Misfire Detected. car came in the shop a no start test fuel presser found 10 psi replace pump with a/c delco car left shop 6 weeks later came in with a miss 3 1 injector owner whated all 6 replaced a/c delco car left shop 4 week later came hard start hot replace modjule and coi...
February 05, 2005
1997 Buick Century Custom 3.1L Poor Idle Quality, Misfire, MIL Lamp on VIN: 264WS52M3V
P0300: Multiple Engine Misfire Detected. This one is my fault, when changing lower intake gasket I got some pushrod out of order and broke 1 pushrod and bent 1, but worse I bent 2 intake valves. So replaced valves and pushrods, Car fired right up with a SLIGHT miss, SES lights up with PO300, scanned ...
February 08, 2005
1998 Chevrolet Blazer 4.3L No Start, Poor Idle Quality, Cuts out, Stall, Misfire VIN: 1GNCS13W4W
P0300: Multiple Cylinder Misfire Detected. vehicle was towed in when we first checked vehicle out vehicle cranked with no comprestion on four cylinders we recommended a motor cust. approved work installed used motor with 35,000 miles aftermotor was installed vehicle would not start on its own to get it...
February 09, 2005
2000 Chevrolet Suburban 1500 LT 5.3L Excessive Emissions, Misfire, MIL Lamp on VIN: 3GNFK16T3Y
P0300: Multiple Cylinder Misfire Detected. Help!!! I've got this suburban that shows misfires on #1&6. I've checked backpressure and found none. No regulator leaking. I've swapped coils and wires. All injectors drop same pressure. Mis only happens between 2000 and 3000 rpms. The only way i know the...
February 09, 2005
1998 Ford Explorer Eddie Bauer 4.0L Poor Idle Quality, Surge, Misfire VIN: 1FMZU34EXW
P0300: missfire. Help!! got a rough idle on this explorer and a missfire at 35/40 mph.we replaced plugs wires f/filter,cleaned mass air sensor.it had a po300 which has not reset even after customer drove for a week.the idle is not real bad but not as smooth as should be.it jus...
February 09, 2005
1988 Nissan Maxima SE 3.0L Misfire VIN: JN1CA21DOW
P0300: Random Misfire. Problem is on medium acceleration and light load fuel injectors #2 and 5 loose their pulse from the pcm. I do not loose the signal for any ignition coils, I have even tried switching coils with other cylinders to see if the problem followed the coils, It didn'...
February 09, 2005
2000 Chevrolet Suburban 1500 LT 5.3L Excessive Emissions, Misfire, MIL Lamp on VIN: 3GNFK16T3Y
P0300: Multiple Cylinder Misfire Detected. Help!!! I've got this suburban that shows misfires on #1&6. I've checked backpressure and found none. No regulator leaking. I've swapped coils and wires. All injectors drop same pressure. Mis only happens between 2000 and 3000 rpms. The only way i know the...
February 10, 2005
1999 Mercedes-Benz E320 4Matic 3.2L Misfire VIN: WDBJH82F7X
P0300: ramdom misfire. Calling all Mercedes experts: I try to stay away from these because I see so few. The car is a 1999 320 4x4 wagon. We got a call from Bob over a month ago; he had just come from the dealer with an estimate for 6500 cocos for an AC repair. He asked my wife if ...
February 10, 2005
2000 Kia Sephia LS 1.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: KNAFB1212Y
P0300: Random Cylinder Misfire Detected. help! i have this 2000 sephia with a poor idle quality what i have is injectors 1&2 not firing when the engine is in crank mode i get a nice bright light on 1&2 when the engine is running i have a pulse but a very dim light if i unplug the connector wi...
February 11, 2005
1999 Volkswagen Jetta GLX 2.8L No Start VIN: 3VWTD81H1X
P0300: missfire. Good afternoon to all. Have a jetta with no spark. The story begins last summer when car got hot it would quit we found that the crank sensor was bad and replaced it.The customer also said that when it rained car would hardly run.A water test gave us a light s...
February 11, 2005
2001 Volkswagen Jetta GLS 2.8L Surge, Misfire VIN: 3VWSG69M71
P0300: general misfire. This vehicle came in two weeks ago with a real bad hesitation and a terrible engine noise. The MAF was replaced and that solved the poor performance. Spark plugs were also replaced as the number one cylinder spark plug had a cracked ceramic. The engine noise (...
February 11, 2005
1999 Volkswagen Beetle GLS 2.0L MIL Lamp on VIN: 3VWCC21C0X
P0300: misfire recognised error occurs intermittent. ... engin light on. owner thought the transmission was going out . it had seven codes the first time p0134,p0300,p0301,p0304,p0303,p0302 . the o2 sensor was out replced it with a set of new plu...
February 15, 2005
1999 Ford E-250 Econoline 5.4L Misfire, MIL Lamp on VIN: 1FTNS24L4X
P0300: random mulitple misfire. Thanks in advance for taking the time to help me. I have dealt with these ford coil problems many times before, but this one has me stumped. It misfires under accel and cruise but it doen't seem to come from one cylinder. If I disconnect the egr, it gets alot ...
February 16, 2005
2000 Pontiac Grand Am GT 3.4L Misfire, MIL Lamp on VIN: 1G2NV52E1Y
P0300: Multiple Cylinder Misfire Detected. This car was towed in with water in oil. Replaced intake gaskets and flushed engine.That problem is fixed. Now, when started cold, engine misfires on #3 and #4 for about 30 seconds. Sets code every time. Cant find any vacum leaks. Plug wires are new as are the...
February 16, 2005
1999 Saab 9-3 2.0L Poor Idle Quality VIN: 4S3DD78N1X
P0300: random misfire. I replaced the head gasket and all went well. As soon as the car was started and running smoothly, it started having a sputter at idle. It will run smooth at idle and about every 5 seconds the RPM will surge down and bounce back up. The car drives just fine do...
February 16, 2005
1997 Acura TL 2.5L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire, MIL Lamp on VIN: JH4UA2651V
P0300: Multiple Misfire Detected. Customer complained of power loss and MIL on. Found major exhaust leak at manifold, found spark plugs completely worn out, chcked timing marks at timing belt and inspect: OK. Replace Cap, rotor, wires and spark plugs, repair major exhaust leak by replacing man...
February 17, 2005
2000 Audi A6 Quattro 4.2L Misfire, MIL Lamp on VIN: WAUZL54B9Y
P0300: random misfire. ... I still have the P0300 random-multiple misfire/P0302 cylinder 2 misfire/P0304 cylinder 4 misfire codes reoccuring all the time. I've looked at injector w...
February 17, 2005
2002 Chevrolet Avalanche 1500 5.3L Misfire, MIL Lamp on VIN: 3GNEK13T12
P0300: Multiple Cylinder Misfire Detected. ... a severe miss, it has a code p0300. I ran the injector clean procedure per the TSB and it did not help. My MT 2500 shows all the even cylinders are misfiring and the odd are fine. The ignition system is working fine and still think it is fuel injector rela...
February 17, 2005
1996 Oldsmobile Cutlass Supreme SL 3.4L Poor Idle Quality, MIL Lamp on VIN: 1G3WH12XXT
P0300: Multiple Engine Misfire Detected. Car came in a month ago with P-0301, replaced valve cover gaskets, plug tubes full of oil. Came back with the P-0300 and P-1441. Found evap hoses swapped, believe that was what was setting evap code but can't find any reason for misfire, our generic scan tool...
February 18, 2005
1999 Ford F-150 Lariat 5.4L Misfire, MIL Lamp on, Lack of Power VIN: 1FTRX18L9X
P0300: Random Misfire Detected. ... on code P0300 random misfire detected. Checked spark plugs and found them worn to a gap of .070 when they should be .050. I replaced spark plugs and boots. Coil over plug design. I replaced the fuel filter it was very restricted, to the point that I don't ...
February 21, 2005
2001 GMC Sierra 1500 SL 5.3L MIL Lamp on VIN: 1GTEK19T01
P0300: Multiple Cylinder Misfire Detected. ... sometimes, usually cold but sometimes at cruise miss loose power, not pull. After 1-5 minutes would clear up, run fine, maybe rest of day or ok for 3-4 days. Well back today, lean bank codes p0174, p0171, but no misfire history n...
February 22, 2005
1997 Mazda 626 LX 2.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1YVGE22DXV
P0300: Random Misfire Detected. ... TUNE UP.tHE VEHICLE RETURNED TODAY WITH A RANDOM MISS FIRE CODE {P0300} WE SCOPED IGNITION SYSTEM, CHECK 02 OPERATION AND FUEL PRESSURE {35 PSI} ALL SEEM NORMAL.THE PROBLEM IT MISS FIRES ANDHAS A ROUGH IDLE AFTER A RESTART WHEN HOT. AFTER A MINUTE AND A HA...
February 24, 2005
1999 Nissan Pathfinder LE 3.3L Misfire, MIL Lamp on VIN: 1C4GT54L6X
P0300: Multiple Misfire Detected. constant surge at 2000 to 2003 rpms at hot temps, when cold ok. start out cold ok until warm at 55 as it warms up the rpm drops. when mil light comes on for code po300 in about 5 sec's it takes off just like it had a 4bbl and it just opened up. have changed di...
February 24, 2005
2002 Dodge Intrepid ES 3.5L Excessive Emissions, Poor Idle Quality, Hesitation, Stall, Misfire VIN: 2B3HD56M62
P0300: Multiple Cylinder Misfire Detected. well, here it is. the initial complaint, first visit, was cel on. code for o2 sensor. tech replaced o2 w/ napa brand. vehicle is back with cel, rotten egg smell as complaint. we had misfire codes and counts on start up for bank w/ cylinders 1,3, and 5. they al...
February 25, 2005
2002 Dodge Durango SLT 4.7L Poor Idle Quality, Stall, Misfire, MIL Lamp on, HARD TO START VIN: 1B4HS48NX2
P0300: Multiple Cylinder Misfire Detected. ... came in the shop for rough idle, and mil on, check and p0335 was in memory. Check harness and voltage and everything ok so i replace sensor, clear codes car seemed to run ok, the same day car comes back with same code, but it is hard to start. When crankin...
February 26, 2005
1997 GMC K1500 Sierra SL 5.7L Misfire, MIL Lamp on VIN: 1GTEK19R6V
P0300: Multiple Cylinder Misfire Detected. ... of time trying to diagnose this vehicle prior to "just throwing some parts at it". This vehicle arrived from a good tire customer at the location I work. He has said whatever it takes just fix it. I have had it for a week now and this is where I am...
February 27, 2005