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P0300 Diagnostic Trouble Code Discussion for March 2006

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
1997 Chevrolet S10 2.2L Excessive Emissions, Misfire, MIL Lamp on, No Power VIN: 1GCCS1440V
P0300: Multiple Engine Misfire Detected. This post is for my satisfaction don,t think they have money to fix problem. Truck has no power.Max rpm is 2500.Checked converter first then unhooked pipe at manifold exhaust ok.All cylinders misfire about the same. Vacuum low map running engine rich can,t fin...
March 01, 2006
2001 Oldsmobile Intrigue GX 3.5L Misfire, MIL Lamp on VIN: 1G3WH52H21
P0300: Multiple Cylinder Misfire Detected. Brought the car in the next day. Start up was good car ran for about 30 sec. then began to miss very bad for about 1 min. Then went away. I let it cool for 1 hr and it was back. Has any one had this problem. Thanks
March 01, 2006
1996 Saab 900 SE Turbo 2.0L Poor Idle Quality VIN: YS3DF78NXT
P0300: random misfire. ... leaking,after he drove it he noticed white smoke out of taipipe,thats when we ended up with it,the two middle cylinders were full of coolant,had head repaired,it was warped badly,reassembled engine and roadtested,runs rough at idle and will stall,also will...
March 02, 2006
2001 Toyota Camry CE 2.2L Misfire, MIL Lamp on VIN: 4T1BG28K11
P0300: Multiple Cylinder Misfire Detected. ... code p0300. Customer asked us to check it out repair the light and do a tune-up. I check for tsbs and found one on the computer and injectors matching this code. The vehicle runs great. I spritzed the wires with water to check for arcing, none found the wi...
March 02, 2006
2000 Toyota Celica GT 1.8L Excessive Emissions, Surge, Cuts out, Stall, Misfire, MIL Lamp on, pig rich exhaust VIN: JTDDR32T3Y
P0300: Multiple Cylinder Misfire Detected. blocked off purge when problem occurred- nochange- motorvac 4k ago, pulled coils and switched- misfire remained at #2, pulled injectors and moved to diff. cylinders. fuel rail full of brown "coffee grounds"-since then rich condition has occured only on...
March 03, 2006
2001 Dodge Ram 2500 Truck 5.9L Misfire, MIL Lamp on VIN: 3B7KC23Z31
P0300: Multiple Cylinder Misfire Detected. Hi i have a ram2500 v8 gas truck ck eng. on #5 dead mis #6 intermittent mis. installed plugs wires and cap rotor to start. no help, ck spark good, ck fuel good, ck compression #1(135lb.)#3(140)#5(125)#7(145), #2(140)#4(145)#6(140)#8(150)...Ok now i have low co...
March 05, 2006
1998 Chevrolet Blazer 4.3L Excessive Emissions, Poor Idle Quality, Poor Fuel Economy VIN: 1GNDT13W5W
P0300: Multiple Cylinder Misfire Detected. This happens to be my son's vehicle (of course). This vehicle backfires just about everytime it starts (that's when the symptons first occured). It is running excessively rich. Injector on time varies between 3.8 to 4.1 ms. MAP is at 1.68 at idle. Fuel trim wa...
March 06, 2006
1996 Mercedes-Benz S320 SWB 3.2L Poor Idle Quality, Surge, Stall, Misfire, MIL Lamp on VIN: WDBGA33E9T
P0300: random missfire. ... nightmare. The has been alot of work done to this car in the last 4 months. anyway, the current problem is a rough running and surge at idle. has also been stalling lately. off idle it runs great, plenty of power and smooth. there was new wires and plugs i...
March 06, 2006
1999 Mitsubishi Galant ES 2.4L Cuts out, Misfire, MIL Lamp on VIN: 4A3AA46G8X
P0300: Random Misfire Detected. ... light on. Had code P0300. Removed all spark plugs and inspected plugs and ign. wires and coils. Spark plugs were almost new and in good condition. Replaced ign. wires. Car ran OK, but came back with code P0300 and skipping. Replaced one ign. coil and car r...
March 06, 2006
1996 Mercedes-Benz S320 SWB 3.2L Poor Idle Quality, Surge, Stall, Misfire, MIL Lamp on VIN: WDBGA33E9T
P0300: random missfire. ... nightmare. The has been alot of work done to this car in the last 4 months. anyway, the current problem is a rough running and surge at idle. has also been stalling lately. off idle it runs great, plenty of power and smooth. there was new wires and plugs i...
March 07, 2006
2001 Volkswagen Passat GLX 2.8L MIL Lamp on VIN: WVWWH63B21
P0300: random multiple misfire 16684. after replacing both timing chain tensioners all above codes started also including bank 2 cam sensor. we tested had 5.01v to bank 2 cam sensor. replaced cam sensor bank 2. still having random multiple misfire on cyl 4,5,6. while replacing both bank tensioners...
March 07, 2006
1998 Chevrolet Astro 4.3L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GCDM19WOV
P0300: Multiple Cylinder Misfire Detected. First code e.g.r and random misfire, remove and clean e.g.r. clear codes .No e g r codes but random misfire still there. Notice number 2,4,6 had misfire counts.removed plugs for 2,4,6 plug gas foul,and numbers 1,3,5 all very clean. One side of motor runs rich....
March 08, 2006
2006 Ford E-150 4.6L MIL Lamp on VIN: 1FTRE14WX6
P0300: random misfire. we have 2 vans wiTh THe same proBLems THe OTher van has 15000 ON IT and also has a po316 fuel trims are very hiGH on cold start around 23% as iT warms up the fuel trims return to normal
March 08, 2006
1996 Chevrolet Blazer 4.3L Misfire VIN: 1GNDT13W7T
P0300: Multiple Cylinder Misfire Detected. Blazer came in with a SES light flashing and a complaint of a rough idle. Engine misses on #3 at idle. When power braking the miss goes away. Miss counter goes to zero. Both running and cranking compression is good. Have replaced #3 injector and plug. Wire is ...
March 09, 2006
2000 Chevrolet Impala LS 3.8L No Start VIN: 2G1WH55K4Y
P0300: Multiple Cylinder Misfire Detected. car was dropped off for rough running when started. next morning would not start. will crank & sometimes start but stall like injectors shutting down, or just backfire in intake. disconnected fuel pump and hooked up bg injection cleaner with gas in it, sam...
March 09, 2006
1999 Ford Expedition XLT 4.6L Misfire, MIL Lamp on VIN: 1FMRU1867X
P0300: Random Missfire. ... ago. I pulled a p0300 code and went straight for the filter. It was totally plugged. I cleared the codes and test drove it. I still felt a miss but the customer was thrilled with the improvement. I had no other ideas so I sent him on his way and told him t...
March 10, 2006
1999 Volkswagen Jetta GL 2.0L MIL Lamp on VIN: 3VWRA29M1X
P0300: 16684 misfire recognised. ... memory. We checked over the codes p0300,p0303,p0304,p0302,p01300. Could not duplicat any of the problem. Cleared codes and road tested no problems. All mo...
March 11, 2006
1997 GMC Yukon SLE 5.7L Surge, Misfire, MIL Lamp on VIN: 1GKEK13R9V
P0300: Multiple Cylinder Misfire Detected. I have this yukon that has a rendom misfire under light load. I can feal real good in 3rd at 60mph. It'll do it in 4th also just not as bad and at 68mph. I have replaced upper intake gaskets, rechecked cap and rotor and pulled all the plugs and replaced the wi...
March 14, 2006
1997 Oldsmobile Achieva S 2.4L Excessive Emissions, Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 1G3NL52Y9V
P0300: Multiple Cylinder Misfire Detected. When the car idls for 5 minutes it misfires and gallops like crazy. If rpms are held at 3500 it gallops and bucs and jumps like crazy also. Tuned up complete! Can not semm to find a vaccum leak with a smoke machine, absolutly nothing seems to work.
March 14, 2006
2001 Mazda Protege ES 2.0L Cuts out, Misfire, MIL Lamp on VIN: JM1BJ22511
P0300: Multiple Misfire Detected. HELP!!! This car is violating all known laws of government and physics! Customer complains of "lack of power, cutting out, hot smell at rear of car--burns your nose", also the MIL comes on, FLASHES and continues to flash even with car running great. Co...
March 15, 2006
1997 Oldsmobile Achieva S 2.4L Excessive Emissions, Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 1G3NL52Y9V
P0300: Multiple Cylinder Misfire Detected. When the car idls for 5 minutes it misfires and gallops like crazy. If rpms are held at 3500 it gallops and bucs and jumps like crazy also. Tuned up complete! Can not semm to find a vaccum leak with a smoke machine, absolutly nothing seems to work.
March 15, 2006
1999 Lexus LS400 4.0L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: JT8BH28F0X
P0300: Multiple Cylinder Misfire Detected. ... Just finished major 90k service. During warm up, vehicle runs just fine. At operating temperature, idle will occasionally surge down accompanied by slightly lower vacuum readings, 18 or 19 compared to the steady 20 at idle. At 2000 rpm same thing will happ...
March 16, 2006
1996 Pontiac Grand Am SE 2.4L Hesitation, Misfire
P0300: Multiple Cylinder Misfire Detected. hey guys, this one has a misfire only off idle under load. came in with new pressure reg. and new plugs. has random misfire set. fuel pressure and volume is good. i removed coil cover and hooked up some spark plug wires in place of coil boots. still misfires o...
March 17, 2006
1997 Chevrolet Lumina 3.1L Stall, Misfire, MIL Lamp on VIN: 2G1WL52M4V
P0300: Multiple Engine Misfire Detected. ... VEHICLE WITH 28867 MILES. I picked up vehicle from customer's house. Vehicle(cold start) started intially and then appeared to be running rich with excessive black smoke coming from tailpipe. Customer stated vehicle was running normally until this morning...
March 19, 2006
1998 Chevrolet C1500 Cheyenne 4.3L Misfire, MIL Lamp on VIN: 1GCECI4WXW
P0300: Multiple Cylinder Misfire Detected. ... under load,idles fine.found several posts regarding worn distributor drive gear,pulled dist.,gears are fine.found several posts recommending to enlarge dist. hold-down hole to adjust.this may be something i attempt later(don't want to mask the ""re...
March 20, 2006
2000 Cadillac Seville STS 4.6L Poor Idle Quality VIN: 1G6KY5497Y
P0300: Engine Misfire Detected. Shows Po300 misfire on cylinders 1&4 on scantool, intermittent problem. Changed plugs and wires, no change. Coil packs seem to be OK. HELP!! Elden
March 22, 2006
2002 Ford Explorer XLT 4.6L Misfire, MIL Lamp on VIN: 1FMCU73W22
P0300: Radom misfire. Customer brought it to me with a missfire complaint. Checked for fire from the coil and found fire. Checked for injector operation with noid light and it was fine. Replaced spark plugs. Crank sensor was cracked and leaking oil though connector. Replaced crank ...
March 22, 2006
2001 Chevrolet S10 4.3L Poor Idle Quality, Misfire VIN: 1GTDT19W21
P0300: Multiple Engine Misfire Detected. Hi just got back from mexico should of stayed there. My co worker left me with a jack pot.He replaced plugs wire cap rotor trying to get rid of a missfire in 1 3 5 cylinders.He spend sometime trying to diag but didnt get anywhere so I got it.Scan shows b1 s1 g...
March 23, 2006
2001 Mitsubishi Galant ES 3.0L Misfire, MIL Lamp on VIN: 4A3AA46H01
P0300: Random Misfire Detected. car came to me with p0300 code and seemed to misfire rechecked all other work and preformed comp test.injecter disable test showed no idle change in cyl#3& #5.i swaped injectors front bank to rear got no change cant, find any vac leaks has any one had a pr...
March 23, 2006
1999 Chevrolet Malibu 2.4L Misfire, MIL Lamp on VIN: 1G1ND52T6X
P0300: Multiple Cylinder Misfire Detected. This car has a misfire on #1 cyl. I replaced plug boots & coil housing but skip remained. Tested fuel injectors and found that #1 injector was not pulsing under load but works good at other times. Scan data is good when inj pulse stops. I suspect ecm. Has ...
March 27, 2006
1999 Volkswagen Beetle GL 2.0L Misfire, poor power VIN: 3VWBC21CXX
P0300: random misfire. ... will start misfiring at 4000 and will not acclerate past this point. Codes p0303 and p0304 will always come back. On light to moderate accel, no misfires, just lack of power. MAF has been replaced and readings before and a...
March 27, 2006
2001 Chevrolet S10 4.3L Poor Idle Quality, Misfire VIN: 1GTDT19W21
P0300: Multiple Engine Misfire Detected. Hi just got back from mexico should of stayed there. My co worker left me with a jack pot.He replaced plugs wire cap rotor trying to get rid of a missfire in 1 3 5 cylinders.He spend sometime trying to diag but didnt get anywhere so I got it.Scan shows b1 s1 g...
March 28, 2006
2001 Chevrolet Silverado 1500 4.3L Surge, Cuts out, Misfire, MIL Lamp on VIN: 2GEC19W311
P0300: Multiple Cylinder Misfire Detected. original complaint, no start. replace burnt out ign rotor and cap(i mean burnt up bad, no graphite post left in cap). engine would now start and idle but upon any slight acceleration engine stumbles and cuts out. scanned comp systems and all appear normal. i n...
March 28, 2006
1996 Dodge Stratus 2.4L No Start, Stall, Misfire, MIL Lamp on VIN: 1B3EJ46X3T
P0300: Multiple Cylinder Misfire Detected. Thank you for your help. Car towed in , crank but no start. Tried again,before test equipment connected, it started. As suggested by IATN tech's with similar problems I inspected cps. It was leaking oil internally and the oil sender was leaking oil just above ...
March 28, 2006
1999 Saab 9-5 2.3L Hesitation, Cuts out, Misfire VIN: YSED58E1X3
P0300: misfire. car came in for check for tune-up.I put plugs &induction service on the car then the car started to getting misfire code.can anyone help me with this.
March 28, 2006
1997 Chevrolet Lumina 3.1L Misfire, MIL Lamp on VIN: 2G1WL52M3V
P0300: Multiple Engine Misfire Detected. This 97 Lumina 3.1 has a intermintent rough running, and flashing check engine light. Thats what the customer says, one time that we had it we started the car to bring it into the shop and it was missing and light was flashing, bring in shop and shut off to ge...
March 29, 2006
2003 Hummer H2 6.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 5GRGN23U93
P0300: Multiple Cylinder Misfire Detected. ... poorly p0300 again tested left back pressure and found +4 psi figured this cat had alos failed replaced left cat still ran poorly checked right back pressure and found +10psi why are the cats going bad fuel trims are around + -1 or 2 no other codes present...
March 29, 2006