Join Now
International Automotive Technicians Network

P0303 Diagnostic Trouble Code Discussion for February 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
2005 Volkswagen Jetta 2.5 2.5L Misfire, MIL Lamp on VIN: 3VWSF71K15
P0303: cyl 3 misfire. Vehicle misfires. Scoped injector and coils-ok. Scoped maf sensor-ok. LTFT -3.5%. Sprayed with gum cutter. No vacuum leaks. Excessive vacuum from filler cap and dipstick tube. Replace vc for possible torn crankcase ventilation diaphram. No change in the way th...
February 04, 2010
2000 Ford F-150 XL 4.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: IFTZF172XY
P0303: cyl3 misfire. The scan tool will not show freeze frame info and in data stream I can see intermitant #3 injector fault(yes). All other are injector fault (no)
February 15, 2010
2004 Toyota Highlander 3.3L Misfire, MIL Lamp on VIN: JTEDP21AX4
P0303: Cylinder 3 Misfire Detected. hello group toyota came in for no oil pressure then turned into front head chewin up cam,replaced heads and now i have a # 3 misfire on light acceleration and a few every now and then on # 1 and # 5,mainly on # 3 though...you dont FEEL the misfires,vehicle run...
February 15, 2010
2003 Isuzu N NPR 6.0L Misfire VIN: 4KLC4B1R03
P0303: miss cyl 3. 5.7 vortech not a 6.0 Fighting a cylinder #3 and #5 missfire. replaced worn out distributer no change. cam retard [...]. swapped injectors no change. new plugs, wires, cap, rotor no change. tech 2 show's running lean bank 1. backpressure test perfect. smoke ch...
February 19, 2010
1996 Honda Civic LX 1.6L Excessive Emissions, Surge, Stall, Misfire, MIL Lamp on VIN: 2HGEJ6670W
P0303: misfire3. here is a tough one. I have a honda civic here that the customer put a long block in himself which he said only came with the head and block so he used his original intake and exhaust. he drove it for 5 days and he says it was driving ok at first and then it ...
February 24, 2010
2003 Mazda Protege ES 2.0L Excessive Emissions, Poor Idle Quality, Hesitation, Misfire, Poor Fuel Economy, MIL Lamp on VIN: JM1BJ22503
P0303: Cylinder 3 Misfire Detected. The car has a dead misfire on number 3 cylinder. I have 170 lbs compression. I put a rebuilt head tune up and same thing. I switched the injectors around no change.
February 24, 2010
2005 Volkswagen Passat GL TDI 2.0L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: WVWAE63B45
P0303: 3 missfire 16687. Customer Stated It Happen Abruptly ,It Has A Clyd. Down .Runs Very Rough, No Power Low End, Smokes, Checked And Changed Fuel Filter, Fuel In Old Separator Looked Great, Air Filter New, Dropped And Changed Oil, No Metal Or Shimmer,Other Forum Suggested Excessiv...
February 25, 2010
2005 Volkswagen Jetta 2.5 2.5L Misfire, MIL Lamp on VIN: 3VWSF71K15
P0303: cyl 3 misfire. Vehicle misfires. Scoped injector and coils-ok. Scoped maf sensor-ok. LTFT -3.5%. Sprayed with gum cutter. No vacuum leaks. Excessive vacuum from filler cap and dipstick tube. Replace vc for possible torn crankcase ventilation diaphram. No change in the way th...
February 04, 2010
2000 Ford F-150 XL 4.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: IFTZF172XY
P0303: cyl3 misfire. The scan tool will not show freeze frame info and in data stream I can see intermitant #3 injector fault(yes). All other are injector fault (no)
February 15, 2010
2004 Toyota Highlander 3.3L Misfire, MIL Lamp on VIN: JTEDP21AX4
P0303: Cylinder 3 Misfire Detected. hello group toyota came in for no oil pressure then turned into front head chewin up cam,replaced heads and now i have a # 3 misfire on light acceleration and a few every now and then on # 1 and # 5,mainly on # 3 though...you dont FEEL the misfires,vehicle run...
February 15, 2010
2003 Isuzu N NPR 6.0L Misfire VIN: 4KLC4B1R03
P0303: miss cyl 3. 5.7 vortech not a 6.0 Fighting a cylinder #3 and #5 missfire. replaced worn out distributer no change. cam retard [...]. swapped injectors no change. new plugs, wires, cap, rotor no change. tech 2 show's running lean bank 1. backpressure test perfect. smoke ch...
February 19, 2010
1996 Honda Civic LX 1.6L Excessive Emissions, Surge, Stall, Misfire, MIL Lamp on VIN: 2HGEJ6670W
P0303: misfire3. here is a tough one. I have a honda civic here that the customer put a long block in himself which he said only came with the head and block so he used his original intake and exhaust. he drove it for 5 days and he says it was driving ok at first and then it ...
February 24, 2010
2003 Mazda Protege ES 2.0L Excessive Emissions, Poor Idle Quality, Hesitation, Misfire, Poor Fuel Economy, MIL Lamp on VIN: JM1BJ22503
P0303: Cylinder 3 Misfire Detected. The car has a dead misfire on number 3 cylinder. I have 170 lbs compression. I put a rebuilt head tune up and same thing. I switched the injectors around no change.
February 24, 2010
2005 Volkswagen Passat GL TDI 2.0L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: WVWAE63B45
P0303: 3 missfire 16687. Customer Stated It Happen Abruptly ,It Has A Clyd. Down .Runs Very Rough, No Power Low End, Smokes, Checked And Changed Fuel Filter, Fuel In Old Separator Looked Great, Air Filter New, Dropped And Changed Oil, No Metal Or Shimmer,Other Forum Suggested Excessiv...
February 25, 2010