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P0300 Diagnostic Trouble Code Discussion for September 2011

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
2005 Chrysler Pacifica 3.5L Misfire, MIL Lamp on VIN: 2C4GM68415
P0300: Multiple Misfire Detected. This car only codes when it has been run about twenty miles as soon as it downshifts into passing gear with heavy acceleration. I have been all over the wiring looking for shorts or bad grounds. Can not find any. This one has me puzzled any help would be great...
September 01, 2011
2005 Chrysler Pacifica 3.5L Misfire, MIL Lamp on VIN: 2C4GM68415
P0300: Multiple Misfire Detected. This car only codes when it has been run about twenty miles as soon as it downshifts into passing gear with heavy acceleration. I have been all over the wiring looking for shorts or bad grounds. Can not find any. This one has me puzzled any help would be great...
September 02, 2011
2001 Honda Accord LX 3.0L Poor Idle Quality, MIL Lamp on VIN: 1HGCG22541
P0300: Multiple Misfire Detected. This Honda idles very poorly. Has random misfire code and misfire codes for all cylinders. All cylinders have 170psi compression and new spark plugs. Smoked out intake and found no vacuum leaks. Removed EGR valve, and made sure it was not stuck open. Even bloc...
September 02, 2011
2001 Honda Accord LX 3.0L Poor Idle Quality, MIL Lamp on VIN: 1HGCG22541
P0300: Multiple Misfire Detected. This Honda idles very poorly. Has random misfire code and misfire codes for all cylinders. All cylinders have 170psi compression and new spark plugs. Smoked out intake and found no vacuum leaks. Removed EGR valve, and made sure it was not stuck open. Even bloc...
September 07, 2011
2004 Cadillac SRX 3.6L Misfire VIN: 1GYEE63734
P0300: Engine Misfire Detected. we have this cadillac with a injector problem we have put a new injector and cleaned the injectors and in the scanner it shows me injector command in msec and #6 will read 2.8 msec when cold and when gets hot it will start to miss and read 0.00 msec would this...
September 08, 2011
2006 Dodge Ram 1500 Truck ST 3.7L Hesitation, Stall, Misfire VIN: 1D7HA16K76
P0300: Multiple Misfire Detected. must be my month i have 3 dodge trucks all with 3.7, 2 are autos 1 is a manual trans.they all have the same symptoms,Intermittently will stall out and or run roughand will not idle.temp ambient and engine temp don't seem to play a role in this.they all spit mu...
September 12, 2011
2007 Ford F-250 Super Duty XL 5.4L Stall VIN: 1FTSX20567
P0300: Random Misfire Detected. Truck came in for mil lamp on, lack of power, running rough and missing. First time for tune up, replaced new plugs with encontered several broken plugs but managed to extract them out with special tools. Replaced intake manifold gaskets, flushed injection sys...
September 14, 2011
2006 Volkswagen Beetle 2.5 2.5L Misfire, MIL Lamp on VIN: 3VWRW31C16
Thanks in advance. This Beetle came in with PO300,302 & 304. We put 5 new coils and plugs. Same thing. Then we did injection service. Same thing. I smoked it hot and cold, no leaks. Swaped injectors,same. Did compression test , all 175. Ramped amp new coil...
September 14, 2011
2006 Volkswagen Beetle 2.5 2.5L Misfire, MIL Lamp on VIN: 3VWRW31C16
Thanks in advance. This Beetle came in with PO300,302 & 304. We put 5 new coils and plugs. Same thing. Then we did injection service. Same thing. I smoked it hot and cold, no leaks. Swaped injectors,same. Did compression test , all 175. Ramped amp new coil...
September 15, 2011
2003 GMC Safari 4.3L Misfire VIN: 1GKEL19X43
P0300: Multiple Cylinder Misfire Detected. This van has been in and out of the dealership a few times and never been fixed.While driving up hill usually,under load, just before it shifts into overdrive, it will miss for a couple of seconds then go away. It will set the check engine light on and sometim...
September 19, 2011
2006 Jeep Liberty Sport 3.7L Misfire, MIL Lamp on VIN: 1J4GL48K76
P0300: Misfire Detected. ... of poor performance, s.e.s. Light on. When i got to road test vehicle, s.e.s. Light was off, vehicle was running great. Scan for codes, po300, random miss fire. Inspected fuel sustem, ok. Replaced spark plugs, due to they were worn. (used chrysler plugs) d...
September 20, 2011
2002 Honda CR-V EX 2.4L Poor Idle Quality, Cuts out, Stall, Misfire, MIL Lamp on VIN: 123HJYJKHH
P0300: Multiple Misfire Detected. I don't know what i am missing here. If you try to hold the vehicle above idle it breaks up and pops almost like the timing is off. If you let the vehicle idle it idles good for about 10-15secs than stalls. Compression looks good. Cat is not clogged, it seems ...
September 21, 2011
2003 Acura MDX 3.5L Misfire, MIL Lamp on VIN: 2HNYD18693
P0300: Random Misfire Detected. Replace engine with used (see repair history). All went well, first road test the vehicle ran great. Performed alignment, road tested again to check steering wheel centering, vehicle misfired, code P0304 - found #4 coil was no good, swapped it out, road tested...
September 23, 2011
2005 GMC Sierra 1500 4.3L No Start, Misfire VIN: 1GTEC14X05
P0300: Multiple Cylinder Misfire Detected. hello and thanks in advance for any help. we have this high mileage truck in our shop and we thought we had fixed when we replaced the dist with good used one. the cam retard is allowed +/- 2 degrees we were unable to get 0 like we wanted but truck ran great a...
September 26, 2011
1996 Chevrolet Camaro 3.8L Excessive Emissions, Misfire VIN: 2G1FP22K7T
P0300: Multiple Engine Misfire Detected. Vehicle came in for failed emissions and running rough at idle. only rough at idle, at about 1500 rpm engine smooths out. Driving down road cannot feel missfire. found cylinder #1 dead at idle. Tested spark - good. checked for vacuum leak around #1 intake runn...
September 27, 2011
1998 BMW 740iL 4.4L Misfire VIN: WBAGJ8329W
P0300: random multi cyl misfire. This car runs fine until you give it full throttle and the rpms get above about 4k rpm. It then starts to hesitate, doesnt feel exactly like a mifire more like it just starts to slow down. then the computer seems to turn off the cylinders that are misfiring. i...
September 28, 2011
2007 Chevrolet Suburban 1500 LS 5.3L Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GNFK16377
P0300: Multiple Engine Misfire Detected. Hey guys, So this one is interesting. First off, lots of lights going on in the dash.. Chk engine, Check stabilitrack, Check traction control, Tire pressure light. Performed basic testing for the cyl 1 misfire. Concluded that the intake valve for cyl 1 is not ...
September 29, 2011
1996 Chevrolet Camaro 3.8L Excessive Emissions, Misfire VIN: 2G1FP22K7T
P0300: Multiple Engine Misfire Detected. Vehicle came in for failed emissions and running rough at idle. only rough at idle, at about 1500 rpm engine smooths out. Driving down road cannot feel missfire. found cylinder #1 dead at idle. Tested spark - good. checked for vacuum leak around #1 intake runn...
September 30, 2011
2000 GMC Yukon XL 1500 SLE 5.3L Misfire VIN: 3GKFK16T4Y
P0300: Multiple Cylinder Misfire Detected. Hi folks, thank you in advance for your help. This Yukon has a strange intermitent miss. it happens either cold or hot and only once or twice a day. When you start it up it will either run great or will barely stay running. When it is acting up it will continu...
September 30, 2011
2000 Toyota Celica GT 1.8L Hesitation, Misfire, MIL Lamp on VIN: JTDDR32T14
P0300: Multiple Cylinder Misfire Detected. This vehicle has come in, customer complaining of MIL. Vehicle hesitates very badly under load and has very rough idle. Went ahead and swapped all the plus and coils around and cleared the MIL to isolate a cylinder, seems cylinder 3 is having the most misfires...
September 30, 2011