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P0300 Diagnostic Trouble Code Discussion for September 2010

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
1999 Cadillac Escalade 5.7L Misfire, MIL Lamp on VIN: 1GYEK13R1X
P0300: Multiple Cylinder Misfire Detected. ... equipped with the 5.7 l motor with this same p0300 under load at about 50-60 mph.no one cylinder is consistent.but it seems that the middle cylinders are most often affected.this cad.looks great on scope and when power braked in shop-cannot make it miss.fu...
September 01, 2010
2001 Oldsmobile Silhouette GL 3.4L No Start, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1GHDX13E61
P0300: Multiple Cylinder Misfire Detected. car dont start but after seat over 3 or 4 hours , or over night the car will start fine and run good then after couple secunds working will start to misfire, loop, backfire and making various other sounds finely not will not run anymore
September 01, 2010
1999 Chevrolet Cavalier Z24 2.4L Misfire VIN: 1G1JF12T5X
P0300: Multiple Engine Misfire Detected. Have replaced all ignition components, timing chain, crank shaft sensor, have rechecked timing, and to no avail all 4 cylinders are missing. No vacume leaks found, fuel pressure at 42 psi, compression at 200-220 all cylinders. Injectors ohm good. Vehicle runs ...
September 08, 2010
1998 Isuzu Rodeo S 3.2L Poor Idle Quality, Hesitation, Surge, Stall, Misfire, MIL Lamp on VIN: 4S2CM58W4W
P0300: Multiple Cylinder Misfire Detected. This is a well-worn Rodeo which we repaired 500 miles ago. At that time a shredded belt chopped up some wires by the radiator. Customer now states she heard a loud noise or bang then the car started running poorly: no power, stalling. And she's not kidding. it...
September 09, 2010
2000 Toyota Tacoma Pre Runner 2.7L MIL Lamp on VIN: 4TAWM72N4Y
P0300: Multiple Cylinder Misfire Detected. Smoked intake system for leaks found leak @ T/B gasket, R&R gasket and cleaned throttle body unit heavy carbon buildup. Jumped pins E1 and TE1 on DLC in engine compartment and RPM didn't increase; verified power, ground and signal to IAC valve. Removed IAC...
September 09, 2010
2000 Chevrolet Silverado 1500 LS 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2GCEC19TOY
P0300: Multiple Cylinder Misfire Detected. Hello guys this one is my personal PLEASE HELP I haven't had the time to do much fuel pressure seams good replaced fuel filter the skip seem to be mostly on. # seven cyl I have swapped plugs coils and wires problem seems to stay on #7 I ran techron through it ...
September 13, 2010
2004 Porsche Cayenne S 4.5L Stall VIN: WP1AB29P14
P0300: random misfire. found #2 ignition coil faulty. replaced. no misfire after repair. vehicle starts and dies still. fuel pressure dropping off after a few seconds of running. replaced both fuel pumps and problem still there. checked fuses and relays.ok. need help please..
September 13, 2010
1997 Chrysler Concorde LX 3.5L Misfire VIN: 2C3HD56FXV
P0300: Multiple Cylinder Misfire Detected. Vehicle came in from another shop. Previous Shop had replaced plugs and wires. Other shop told customer they had a bad injector. I still went through diagnostics to verify. Vehicle still showing Cyl. 1 Misfire. Checked compression and had 190lbs of compression...
September 14, 2010
1998 Chevrolet Tahoe 5.7L Poor Idle Quality, Hesitation, Poor Fuel Economy, MIL Lamp on VIN: 1GNEK13R4W
P0300: Multiple Cylinder Misfire Detected. When this vehicle idles it is missing shaking it then idles real low where also black smoke starts coming out of exhaust and sometimes even pops out of the exhaust i looked at the misfire counter and yesterday all cylinders were missing i found that the maf wa...
September 15, 2010
1999 Chevrolet C1500 Suburban 5.7L Misfire VIN: 3GNEC16RXX
P0300: Multiple Cylinder Misfire Detected. ... came in with a p0300 and no.4 cyl showing misfires. Customer states mil only comes on during freeway driving over 70 mph and no misfire is felt. Drove vehicle and confirmed complaint, was able to set mil 3 times and freeze frame showed 70 mph everytime and...
September 15, 2010
2006 Saturn Ion-2 2.2L MIL Lamp on VIN: 1G8AZ52F95
P0300: Random Misfire Detected. ... CEL coming on, no driveability complaints. Scanned for codes and found P0300 - misfire detected. Vehicle seemed to run fine with no obvious misfires. Took for a drive and ran fine the whole time. Checked scan data and found fuel trims fine - staying betwee...
September 15, 2010
1998 Chevrolet K1500 Silverado 5.0L Misfire VIN: 1GCEK14M7W
P0300: Multiple Cylinder Misfire Detected. ... about this 1998 k1500 truck. It has the 5.0 in it. Im getting the code p0300 multi misfire. Hook scan tool up to it. At idle it misses on 7 allot once and awhile 1. When you bring the rmp up to 3500 7 and 1 will clear up and it will miss on 2. They decided...
September 16, 2010
2004 Volkswagen Passat GLS 1.8L Poor Idle Quality, Misfire VIN: WVWPD63B54
P0300: misfires. The car runs very poorly at idle only. Lots of DTC codes, mainly P030X for misfires, but also if you wait long enough I'll get codes for too lean mixtures. The car came from dealer who recommended to replace the whole car... Crankcase elbow pipe on block was ...
September 16, 2010
2002 Chevrolet Silverado 1500 4.8L Hesitation, Cuts out, Stall, Misfire, MIL Lamp on, extended crank VIN: 1GCEC14X2Z
P0300: Multiple Cylinder Misfire Detected. At initial startup engine seems to have a dead spot and backfire when accelerating. After a few minutes,of driving it Runs very good. with no lag and or backfire and plenty of power.Scantool data shows O2 sensors switching with no interuptions during road test...
September 17, 2010
2000 Saturn LS2 3.0L Poor Idle Quality, Hesitation, Stall, Misfire, MIL Lamp on VIN: 1G8JW52R5Y
P0300: Random Misfire Detected. Started as antother techs job got to me and it had not power only would move from the power in drive. No throttle response at all. Had a code in it for the throttle body so i folllowed tsb for r&r tb and pigtail. This part was from the yard. So i put it on...
September 17, 2010
2000 Toyota Tacoma Pre Runner 2.7L MIL Lamp on VIN: 4TAWM72N4Y
P0300: Multiple Cylinder Misfire Detected. Smoked intake system for leaks found leak @ T/B gasket, R&R gasket and cleaned throttle body unit heavy carbon buildup. Jumped pins E1 and TE1 on DLC in engine compartment and RPM didn't increase; verified power, ground and signal to IAC valve. Removed IAC...
September 20, 2010
1999 Volvo S80 2.9 2.9L Misfire, No Power VIN: YV1TS97D4X
P0300: Random Engine Missfire. We have the same problem NO POWER and P0300. We don't know where else to look the car has no aceleration and no power, we don't have any other codes the Throtle Body is clean and no malfunction codes for the throtle body. Engine sounds like the exhaust is clog...
September 20, 2010
2004 Chevrolet Optra LS 2.0L MIL Lamp on VIN: KL1JK52Z64
P0300: random missfire detected. This vehicle came in with a P0300 stored in memory. computer data is normal with good fuel trims and no noticeable symptoms.No miss fire detected at anytime during testing.Vehicle is in good state of tune with recent spark plugs,and filter.No other codes store...
September 21, 2010
2003 Porsche 911 Carrera 3.6L Misfire VIN: WPOCA29923
P0300: misfire. customer brought car in for check engine light repair.(see codes) customer took car to another shop for prior work. they replaced the spark plugs. replace ignition coil (cylinder 4) and fuel injector (cylinder 4) now brought there problem to us. cleared codes ...
September 21, 2010
2001 Kia Sephia 1.8L Surge, Misfire, MIL Lamp on VIN: KNAFB12191
P0300: Random Cylinder Misfire Detected. After timing belt replacement and tune-up, cust. says engine surges and loses power at times. Mostly during 55 mph steady cruise, and at times under accel. I was able to duplicate this condition one time. When it did happen, O2 volts were very low (lean), fue...
September 22, 2010
2003 Porsche 911 Carrera 3.6L Misfire VIN: WPOCA29923
P0300: misfire. customer brought car in for check engine light repair.(see codes) customer took car to another shop for prior work. they replaced the spark plugs. replace ignition coil (cylinder 4) and fuel injector (cylinder 4) now brought there problem to us. cleared codes ...
September 22, 2010
2001 Kia Sephia 1.8L Surge, Misfire, MIL Lamp on VIN: KNAFB12191
P0300: Random Cylinder Misfire Detected. After timing belt replacement and tune-up, cust. says engine surges and loses power at times. Mostly during 55 mph steady cruise, and at times under accel. I was able to duplicate this condition one time. When it did happen, O2 volts were very low (lean), fue...
September 23, 2010
2001 Chevrolet Express 1500 5.0L MIL Lamp on VIN: 1GNFG15M41
P0300: Multiple Cylinder Misfire Detected. Vehicle originally came in with a constant fouling of the #6 spark plug. Found the fuel injector on that cylinder bad, dropping spray. Also found the intake manifold gasket causing an internal vacuum leak. Repaired these items. Engine actually runs great but w...
September 27, 2010
2004 Chevrolet Optra LS 2.0L MIL Lamp on VIN: KL1JK52Z64
P0300: random missfire detected. This vehicle came in with a P0300 stored in memory. computer data is normal with good fuel trims and no noticeable symptoms.No miss fire detected at anytime during testing.Vehicle is in good state of tune with recent spark plugs,and filter.No other codes store...
September 27, 2010
1998 Chevrolet K1500 Suburban 5.7L shudder VIN: 3GNFK16R8W
P0300: Multiple Cylinder Misfire Detected. I get a bad shudder or vibration on moderate load at about 60 mph it starts slow then build up to a bad vibration. yet if i get into it hard or let off it stops. my first instinct is transmission. any help apreciated thanks in advance.
September 29, 2010
2007 Suzuki XL-7 Luxury 3.6L Excessive Emissions, Misfire, MIL Lamp on VIN: 2S3DA21777
P0300: Engine Misfire Detected. I have a MODIS. Worked on this 1 week ago.No Suzuki avail. Performing diag Gen OBDII. Codes received are as follows. PO050, PO154, PO008, PO300, PO304, PO306, PO302. When vehicle came in is was running rough and black smoke from exhaust. Fuel Trim numbers were...
September 29, 2010
1997 Mercedes-Benz E420 4.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: WDBJF72F1V
Hey Mercedes Gurus, This car came to me after a phone conversation pricing the RS camshaft adjuster versus the dealer price. The customer mentioned the above codes (which he read using his tester). The dealer did nothing to explain the correlation between the...
September 30, 2010
2008 Mitsubishi Raider LS 3.7L Misfire VIN: 1Z7HC22K38
P0300: Random mulitple missfire. ... help me out here. I have this Mitsu Raider (aka Dodge dakota) which has a constant missfire at 2700rpm only. Watching missfire count using scan tool it will miss on cyl. 1 and 4 only mostly cyl 1 with a count of 230+ and cyl 4 with about half that in the 1...
September 30, 2010