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P0300 Diagnostic Trouble Code Discussion for March 2012

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
2004 Ford F-150 FX4 5.4L Misfire VIN: 1FTPW14544
P0300: missfire present random. vehicle was towed into shop for bad missfire checked and found random missfire codes on all cyclinders checked and found plugs still original removed and replaced all plugs with factory plugs and replaced all coils with factory coil as well. upon start up of v...
March 01, 2012
2009 Mini Cooper 1.6L Misfire VIN: WMWMF33549
P0300: misfire. Misfire - stall only when cold. Runs good warm. Found o2 b1s1 slow and installed new oem sensor. Noticed improvement. Installed new oem spark plugs, still has misfire,TSB for crankcase vacuum spec. 22 (mBar)inspect and found It at 91 (mBar) Installed new oem v...
March 02, 2012
2001 Ford Windstar SE 3.8L Misfire VIN: 2FMZA524X1
Hi i have a windstar with a very wierd issue, ok, veh runs perfect at idle, ingear under load, engine accels to 2500rpm, at this point it starts misfiring on cyl 4,5,6. Holding the brake and continuing to push down the accelerator veh actually looses power hor...
March 05, 2012
2003 Honda Pilot EX 3.5L MIL Lamp on VIN: 2HKYF18653
P0300: Random Misfire Detected. The mis fire code for cyld 3 is the one that returns first and most frequent. The code will set at idle in stall after five to ten minutes. The fuel pressure will hold for three minutes. Out on the highway vehicle runs very good. When the cat is cool the readi...
March 05, 2012
1997 Lexus ES300 3.0L MIL Lamp on
P0300: Multiple Cylinder Misfire Detected. regular cust- has had in last year: timing belt, plug wires and plugs, filters, along with bunch of misc. other maintenance. month ago had random misfire along with cyl 1 misfire- replaced #1 plug along with wires [although the eng was tuned 6 months ago] clea...
March 05, 2012
2000 Mercedes-Benz C280 2.8L Misfire, MIL Lamp on VIN: WDBHA29G1Y
P0300: Missfiring TWC damaging. Checked posting history on this issue. We dropped the cats and road tested. No change. Replaced original fuel filter. No change. Checked the wiring harness for any cracks and the usual degradation of the vinyl covering. Has anyone had a wiring or injector prob...
March 05, 2012
2004 Nissan Maxima SL 3.5L Excessive Emissions, Poor Idle Quality, Cuts out, Misfire, MIL Lamp on, rev limits VIN: 1N4BA41E34
P0300: Multiple Misfire Detected. ... will not rev above 2500 rpm (except with throttle snap). Customer himself checked codes and had P0300 and P0113(IAT) and P0102(MAF). He himself then replaced the spark plugs and coils as well as MAF sensor. Still had problem and brought to us. I verified t...
March 06, 2012
2001 Buick Regal LS 3.8L Poor Idle Quality, Hesitation, Cuts out, Misfire, MIL Lamp on VIN: 2G4WB55KX1
P0300: Multiple Engine Misfire Detected. ... vehicle orig came in for drivability issues. The car stumbled/chugged occasionaly and spit p0300 and was showing misfires on all cyl. Another tech that has since moved on worked on the car and came to the conclusion that the computer was bad and replaced t...
March 07, 2012
2003 Mazda 6 i 2.3L Poor Idle Quality, Surge, MIL Lamp on VIN: 1YVFP80C33
P0300: Random Misfire Detected. Please help me. I have exhausted all my talent into this car and I am ready to destroy it. I have done everything I can think of. This vehicle came in with mil on and misfire at idle and some surging. I checked for vacuum leaks and found none. Checked compress...
March 09, 2012
2005 Nissan Xterra Off-Road 4.0L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 5N1AN08W35
P0300: Multiple Misfire Detected. engine misfiring all the time at idle. power balance test results in same rpm drop with each cylinder, removed and flow tested injectors and they are ok, compression is 180 psi. tried new coils and no change, bank 1 fuel trim 15-20% while bank 2 right around 0...
March 09, 2012
1999 Toyota Avalon XL 3.0L Poor Idle Quality, Misfire VIN: 4T1BF18B8X
P0300: Multiple Cylinder Misfire Detected. ... question my career choice sometimes. Car came in running fine. We found leaking valve covers and replaced the gaskets. Also installed new plugs (NGK). Upon finishing, fired the car up and it ran terrible, with a pop in the catalytic convertor area. CEL fla...
March 13, 2012
2003 Chevrolet Malibu LS 3.1L Hesitation, Surge VIN: 1G1NE52JX3
P0300: Multiple Cylinder Misfire Detected. No history on this vehicle. Car runs great at idle and free revs in [...], until injector cutoff. Has same symptoms as exhaust being plugged, but exhaust has good flow. Wondering if an intermittant 24x crank signal could cause this sag on acceleration?
March 14, 2012
2004 Chevrolet Silverado 1500 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GCEK19Z54
P0300: Multiple Cylinder Misfire Detected. ... with terrible idle, scanned for codes p0300 the watched miss fires on #2&4 pull plugs and #4 is wet with fuel #2 was dry , swapped for new. checked spark ok fuel pressure ok compression ok injector leak down test ok. Fired up and ran with same poor idl...
March 14, 2012
2005 Jaguar S-Type Sport 4.2L MIL Lamp on, fuel trims VIN: SAJWA01UX5
P0300: random misfire. On this visit, I tried a brand new air mass meter first thing. Swapping it out brought total fuel trims to +10% on both banks where previously b1 was at +17ltft and 0stft, b2 was at +10ltft and +6stft. I gave it a good test drive and watched fuel trims, I note...
March 14, 2012
2007 Lexus ES350 3.5L Misfire, MIL Lamp on VIN: JTHBJ46G47
P0300: Multiple Cylinder Misfire Detected. at this point code p0015 will not clear. idle races at 1700 rpm. fuel system 1 status is open loop-flt (fault). all vvt data readings are zero at all times whether driving or idling. I can activate vvt systems thru actuator test but its dead while driving. car...
March 14, 2012
2000 Toyota Camry CE 2.2L Misfire VIN: 4T1BG22K3Y
P0300: Multiple Cylinder Misfire Detected. I wonder if i created this problem by replacing the timing belt or maybe i have a bad crank sensor? Has anyone seen this before? is it a software issue? I haven't yet hooked up labscope, as it will be a real pain as the symptom only occurs above 60 mph
March 14, 2012
1997 Chevrolet Venture LS 3.4L Surge, Misfire, MIL Lamp on VIN: 1GNDU03E4V
P0300: Multiple Cylinder Misfire Detected. ... giving us p0300 codes intermintently. As one can see I have replaced parts that were worn out and tried new parts and/or known good parts for testing purposes. What stands out is the neg fuel trims all the time and an approx reading of 15-16 inhg vac when ...
March 16, 2012
1999 Chevrolet Tahoe LS 5.7L Cuts out, Misfire, MIL Lamp on VIN: 1GNEK13R8X
P0300: Multiple Cylinder Misfire Detected. This truck runs great under normal driving conditions, even under a hard acceleration. Then when you let off the gas a little while driving, get back into the gas, it starts missing on cyls. 4 & 5. Cyl. 5 goes around 200 counts, no. 4 around 10 counts. Som...
March 16, 2012
2008 Chrysler Town & Country (Van) LX 3.3L Hesitation, Cuts out, Stall, MIL Lamp on
P0300: random multi misfire. I did a tune up ( new plugs and wires) and replaced the battery. The van ran fine on a short test drive but the customer called me back an hour later with the above listed conditions. I rechecked my work and everything looks fine, cleared the codes and test dr...
March 18, 2012
2008 Chrysler Town & Country (Van) LX 3.3L Hesitation, Cuts out, Stall, MIL Lamp on
P0300: random multi misfire. I did a tune up ( new plugs and wires) and replaced the battery. The van ran fine on a short test drive but the customer called me back an hour later with the above listed conditions. I rechecked my work and everything looks fine, cleared the codes and test dr...
March 19, 2012
2002 Dodge Ram 1500 Van 3.9L Excessive Emissions, Poor Idle Quality, Misfire VIN: 2B7HB11X92
P0300: Multiple Cylinder Misfire Detected. I am trying to get this vehicle to pass CA smog. It has new ignition parts, good compression, I have swapped the injectors around, smoke test ect. The truck runs fine except at idle it devolopes a rough idle and sets missfire codes on multiple cylinders. Thank...
March 19, 2012
1997 Chevrolet Venture LS 3.4L Surge, Misfire, MIL Lamp on VIN: 1GNDU03E4V
P0300: Multiple Cylinder Misfire Detected. ... giving us p0300 codes intermintently. As one can see I have replaced parts that were worn out and tried new parts and/or known good parts for testing purposes. What stands out is the neg fuel trims all the time and an approx reading of 15-16 inhg vac when ...
March 20, 2012
2001 Chevrolet Express 2500 4.3L Misfire, MIL Lamp on VIN: 1GCFG25W01
P0300: Multiple Cylinder Misfire Detected. ... moinitors for #1&4 cyls. No missfire at idle but starts at about 1500 to about 2600 rpm. Does'nt show missfire under hard accel or idle just steady cruise. We reset cam retard from -10 to 0 which got rid of p1345 but miss still there. Watching tech2 wh...
March 20, 2012
2004 Chevrolet Colorado LS 3.5L Misfire, MIL Lamp on VIN: 1GCDT13624
P0300: Engine Misfire Detected. Criuse speed no miss detected in any cylinder ?? Only hot idle I think its the same cylinder head issue that GM has a bulletin out for improper valve to cylinder head seating is the cause i think any GM tech no if i could be right . I was a GM tech for 24 year...
March 20, 2012
2003 Cadillac DeVille 4.6L MIL Lamp on VIN: 1G6KD54Y83
P0300: Engine Misfire Detected. ... shop. Car had a miss and check engine light was flashing with a P0300. Found sparkplug wells full of oil and insulator boots carbon tracked. We compression tested engine, replaced all sparkplugs, valve cover gaskets, and insulator boots and misfire is gone...
March 21, 2012
1997 Lexus ES300 3.0L MIL Lamp on
P0300: Multiple Cylinder Misfire Detected. regular cust- has had in last year: timing belt, plug wires and plugs, filters, along with bunch of misc. other maintenance. month ago had random misfire along with cyl 1 misfire- replaced #1 plug along with wires [although the eng was tuned 6 months ago] clea...
March 21, 2012
2003 Cadillac DeVille 4.6L MIL Lamp on VIN: 1G6KD54Y83
P0300: Engine Misfire Detected. ... shop. Car had a miss and check engine light was flashing with a P0300. Found sparkplug wells full of oil and insulator boots carbon tracked. We compression tested engine, replaced all sparkplugs, valve cover gaskets, and insulator boots and misfire is gone...
March 22, 2012
2001 Chevrolet Tahoe 5.3L Stall, extened crank VIN: 1GNEC13T01
P0300: Multiple Cylinder Misfire Detected. tahoe will die sometimes hot or cold. and every other time you try to start it, it cranks for a while before it starts. replaced mass air flow under warranty and reading normal. flushed injectors again. ect and iat read within 4 degrees of each other on cold e...
March 22, 2012
2001 Chevrolet Tahoe 5.3L Stall, extened crank VIN: 1GNEC13T01
P0300: Multiple Cylinder Misfire Detected. tahoe will die sometimes hot or cold. and every other time you try to start it, it cranks for a while before it starts. replaced mass air flow under warranty and reading normal. flushed injectors again. ect and iat read within 4 degrees of each other on cold e...
March 22, 2012
2006 Chevrolet Express 2500 4.8L No Start VIN: 1GCGG29V16
P0300: Multiple Cylinder Misfire Detected. ... newest nightmare. This van came in for a no start. found 14 codes in pcm, 8 for o2 sensors, 2 evap, 3 trans codes and the p0300. After clearing the codes and recranking the engine the only codes that come back are 2 o2 heat...
March 23, 2012
2001 Isuzu Rodeo LS 3.2L MIL Lamp on VIN: 4S2DM58WX1
P0300: Multiple Cylinder Misfire Detected. This truck runs sweet but flags misfire codes and even flashes above 1500rpm. Customer wanted a tune-up for maintenance purposes anyway, so the dealer-specified plugs were installed. Coils all put back in proper place (#6 boot shorter than the rest). No change...
March 24, 2012
2007 GMC Yukon XL 1500 SLT 5.3L Misfire, MIL Lamp on VIN: 1GKSK163X7
P0300: Multiple Engine Misfire Detected. i have known this vehicle since it was new fairly well maintained removed valve cover and the valves seem to be functioning properly
March 27, 2012
1998 Porsche Boxster 2.5L Stall, MIL Lamp on, VIN: WP0CA2989W
P0300: random missfire. Hello to all you porsche guru's! I've got a good one, this car came in stalling at idle and on deceleration when the clutch was disengaged. It then would have a difficult time restarting especially after a hot soak. It had a bunch of miss fire faults in the co...
March 27, 2012
2001 Nissan Quest GLE 3.3L Misfire VIN: 4N2ZN17T51
P0300: Multiple Misfire Detected. ... water pump replaced and had a code P0301. Found #1 wire bad. Replaced wires. P0300. Checked vacuum and it is 21 with no fluctuation. MAF is 4 g/s at idle, fuel trims are within +_3 no other codes. Pulled plugs and all are clean. No coolant leakage. Only ha...
March 28, 2012
2002 Mazda MPV ES 3.0L Misfire VIN: JM3LW28J02
P0300: Multiple Misfire Detected. I have two main questions for everyone. First is there a way to vew missfires on these things because Mode 6 pid 53 is not supported. The second one is in freeze frame it lists two different temp readings. one say electronic coolant tempreture (f) and the seco...
March 29, 2012
2006 Hyundai Sonata GLS 3.3L Misfire, MIL Lamp on VIN: KMHDN46D26
P0300: Multiple Misfire Detected. ... work. I am working on an 06 Hyundai Sonata 3.3L. OK, 2 weeks ago car came in with MIL illuminated. Founf one code: P0011- Cam timing advance-bank one. Discovere that the oil was VERY dirty & was told the wrong viscosity w...
March 30, 2012
1998 Porsche Boxster 2.5L Stall, MIL Lamp on, VIN: WP0CA2989W
P0300: random missfire. Hello to all you porsche guru's! I've got a good one, this car came in stalling at idle and on deceleration when the clutch was disengaged. It then would have a difficult time restarting especially after a hot soak. It had a bunch of miss fire faults in the co...
March 30, 2012