Join Now
International Automotive Technicians Network

P0303 Diagnostic Trouble Code Discussion for October 2010

Cylinder 3 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 P0303
Help Request Posted
2004 Mazda B4000 4.0L Excessive Emissions, Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 4F4YR46E54
P0303: Cylinder 3 Misfire Detected. Hi fellow Mazda techs. MIL flashing when vehicle came in. Hooked up IDS and found those codes. Data logger shows O2 precat fluctuating OK, O2S12 .91V steady and O2S22 .75V steady. LTFT bank 1 -15% and LTFT bank 2 25%. And then all of a sudden all lines on IDS ...
October 01, 2010
2001 Volkswagen Passat GLS 1.8L Misfire, cold 30sec to 1 min VIN: WVWVD63B81
P0303: miss cly3. miss wene cold for 30sec to one min thene runs good no miss rr coils and plugs. ect and maf is good! ecu? or ecu reflash is need??
October 01, 2010
1997 Subaru Impreza Outback 2.2L Hesitation, Cuts out, Stall, Misfire, MIL Lamp on, Miss= hvy-off idle. VIN: JF1GF4856V
P0303: Cylinder 3 Misfire Detected. Aftr initl mouse chew repairs made in Oregon, left shop w/cel on bu no runablty probl. Fueled up in centrl Wash, drove approx 75+/- miles (1/4 tank), then cel started flashing & had very notable misfire. She continued driving another [...] to get home &...
October 06, 2010
1999 Volkswagen Beetle GL 2.0L Poor Idle Quality, Hesitation, Misfire VIN: 3VWCC21C4X
P0303: Cyl 3. Car came in barely running, with multiple misfire codes. Has codes for all cyl misfiring. Champion spark plugs that were replaced 50 miles ago fouled out. Ign coil also tested bad.we replaced plugs with ngk platinums, and ign coil. Cleared codes, but after run...
October 06, 2010
1997 Subaru Impreza Outback 2.2L Hesitation, Cuts out, Stall, Misfire, MIL Lamp on, Miss= hvy-off idle. VIN: JF1GF4856V
P0303: Cylinder 3 Misfire Detected. Aftr initl mouse chew repairs made in Oregon, left shop w/cel on bu no runablty probl. Fueled up in centrl Wash, drove approx 75+/- miles (1/4 tank), then cel started flashing & had very notable misfire. She continued driving another [...] to get home &...
October 07, 2010
2003 Audi A6 Quattro Avant 3.0L Misfire VIN: WAUVT64B13
P0303: misfire cyl 3. I am turning to all you audi guru's for help. There is an auto that was brought over to me from a different auto shop. The previous problem was that one of the exhaust Camshaft Lob from the passenger side head was lost and one lifters. The mechanics in the oth...
October 10, 2010
1998 Mercedes-Benz ML320 3.2L Misfire VIN: 4JGAB54E5W
P0303: Cyl 3 Missfire. When testing, right now the only thing I find wrong is that injector Cyl 3 and Cyl 6 are not fired by the ECU. There is power at both of these injectors. The question is why are these 2 Injectors shut off. I understand that the ECU can selectively shut down an...
October 11, 2010
1998 Mercedes-Benz ML320 3.2L Misfire VIN: 4JGAB54E5W
P0303: Cyl 3 Missfire. When testing, right now the only thing I find wrong is that injector Cyl 3 and Cyl 6 are not fired by the ECU. There is power at both of these injectors. The question is why are these 2 Injectors shut off. I understand that the ECU can selectively shut down an...
October 12, 2010
2006 Chevrolet Silverado 2500 HD LT 6.6L Poor Idle Quality, Misfire VIN: 1GCHK23276
P0303: Cylinder 3 Misfire Detected. Hi every one i have this daramax that runs very poor.i do not know the daramax very well my bal rate for each cyl is #1 -4.7 #2-4.0 #3 12.3 #4 12.0 #5 -2.9 #6 -4.0 #7 2.5 #8 -4.0 at idle it smokes and beraly runs if anybody can help i thankyou and have a good ...
October 14, 2010
2002 Volvo V70 X/C 2.4L Misfire, MIL Lamp on VIN: YV1SZ58D22
P0303: Cylinder 3 Misfires. Intermittent cylinder #3 Misfires. Cylinder #1 injector open circuit.
October 14, 2010
1997 Ford Taurus GL 3.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FALP52UXV
P0303: Cyl.3 Misfire. ... no start and/or start and stall condition. I drove it into the shop then it wouldn't restart. During the no start condition I always had sufficient spark, inj pulse & proper fuel pressure 35psi. I thought "how come its not starting?" Came back...
October 18, 2010
2000 Audi A6 Quattro 4.2L Misfire, MIL Lamp on VIN: WAUZL54B3Y
P0303: Cyl. 3 misfire detected. ... frequent) vehicle will run very rough after starting, MIL flashing, will set P0303, and sometimes will be accompanied by P0300. #3 coil replaced, have swapped injector, swapped new coil to other bank, swapped spark plug, to no av...
October 20, 2010
2001 Mazda Millenia 2.3L Misfire VIN: JM1TA22011
P0303: Cylinder 3 Misfire Detected. We have a millenia "s" that has come back after fixing a misfire. We have replaced spark plugs, coil on #3 cylinder, checked compression. It seems to only want to miss after its been shut off for a while and goes away after running for a few minutes. B...
October 20, 2010
2003 Audi A6 Quattro 4.2L Poor Idle Quality, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: WAUML64B03
P0303: Cylinder 3 Misfire. ... battery had 51cca. Installed new battery, upon start up engine had noise, appears to come from inside the intake. After the chain tensioners and valve cover gaskets, no codes but cam crank correlation and misfire p0300-p0303 pu...
October 21, 2010
2000 Audi A6 Quattro 4.2L Misfire, MIL Lamp on VIN: WAUZL54B3Y
P0303: Cyl. 3 misfire detected. ... frequent) vehicle will run very rough after starting, MIL flashing, will set P0303, and sometimes will be accompanied by P0300. #3 coil replaced, have swapped injector, swapped new coil to other bank, swapped spark plug, to no av...
October 22, 2010
2002 Land Rover Freelander S 2.5L Misfire, MIL Lamp on VIN: SALNM22252
P0303: Cylinder 3 misfire. Losing injector pulse from #1 and 3 cylinders after about 20 secs. Of vehicle running. Replaced vis motors on intake. Performed compression check on all cylinders at 160 lbs.ive swapped injectors and coils, replaced all spark plugs, problem comes back to #1 an...
October 26, 2010
2007 Chrysler PT Cruiser 2.4L Surge, Misfire, MIL Lamp on VIN: 3A4FY58B87
P0303: Cylinder 3 Misfire Detected. ... repair with a miss at highway speeds. the mil lamp is on. we checked for codes and found a p0303. We removed the spark plug and found that the threads on the plug were melted. we did a compression check cylinder 1 - 160 cylinder 2 - 150 cylinder 3 - 125 cy...
October 27, 2010
1997 Ford Taurus GL 3.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FALP52UXV
P0303: Cyl.3 Misfire. ... no start and/or start and stall condition. I drove it into the shop then it wouldn't restart. During the no start condition I always had sufficient spark, inj pulse & proper fuel pressure 35psi. I thought "how come its not starting?" Came back...
October 27, 2010
2002 Land Rover Freelander S 2.5L Misfire, MIL Lamp on VIN: SALNM22252
P0303: Cylinder 3 misfire. Losing injector pulse from #1 and 3 cylinders after about 20 secs. Of vehicle running. Replaced vis motors on intake. Performed compression check on all cylinders at 160 lbs.ive swapped injectors and coils, replaced all spark plugs, problem comes back to #1 an...
October 27, 2010