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P0303 Diagnostic Trouble Code Discussion for May 2008

Cylinder 3 Misfire Detected


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Trouble Ticket Help Requests for DTC P0303
Help Request Posted
1998 Oldsmobile Intrigue GL 3.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G3WS52K4W
P0303: 3. hey all. my son has a 98 intrigue 3.8. at idle the misfire counter starts rapidly counting. at about 1500 rpms the misfires stop. runs great on the highway. not good at idle. the engine was replaced about 3000 miles ago with a 50k mile used part. ran great unt...
May 02, 2008
2003 Jeep Grand Cherokee Limited 4.7L Misfire VIN: 1J4GW58N73
P0303: Cylinder 3 Misfire Detected. Have a 2003 Grand Cherokee. Missfire #3 cylinder. Plug and coil good. Have checked injector pulse injector resistance both O.K. Smoked intake for vacuum leaks none found. Checked coolant for HC also negative. Removed and cleaned all PCM grounds. Has anyone run...
May 09, 2008
2001 Chevrolet Blazer Xtreme 4.3L Misfire VIN: 1GNCS18W31
P0303: Misfire Cylinder 3. Vehicle misfire at idle. Off idle vehicle smooth out. Misfire is very sutle. Fuel pressure is within norm. Fuel Injecto balance test is pretty much even. Customer had replaced cap rotors ignition wire set. Spark looks fine. I can hear a slight tapping noise co...
May 17, 2008
2001 Chevrolet Blazer Xtreme 4.3L Misfire VIN: 1GNCS18W31
P0303: Misfire Cylinder 3. Vehicle misfire at idle. Off idle vehicle smooth out. Misfire is very sutle. Fuel pressure is within norm. Fuel Injecto balance test is pretty much even. Customer had replaced cap rotors ignition wire set. Spark looks fine. I can hear a slight tapping noise co...
May 20, 2008
1998 Ford Windstar GL 3.8L MIL Lamp on VIN: 2FMDA5148W
P0303: 3 Cylinder miss. Codes p0303, p1512 & p1513 Customer complained of car miss fire and check engine light came on. Car runs fine now, but noticed oil in air cleaner. Checked IMRC gromets, ok, both hold vacuum, and move freely when taken off idle and when moved by hand. Check...
May 20, 2008
1998 Oldsmobile Intrigue GL 3.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G3WS52K4W
P0303: 3. hey all. my son has a 98 intrigue 3.8. at idle the misfire counter starts rapidly counting. at about 1500 rpms the misfires stop. runs great on the highway. not good at idle. the engine was replaced about 3000 miles ago with a 50k mile used part. ran great unt...
May 02, 2008
2003 Jeep Grand Cherokee Limited 4.7L Misfire VIN: 1J4GW58N73
P0303: Cylinder 3 Misfire Detected. Have a 2003 Grand Cherokee. Missfire #3 cylinder. Plug and coil good. Have checked injector pulse injector resistance both O.K. Smoked intake for vacuum leaks none found. Checked coolant for HC also negative. Removed and cleaned all PCM grounds. Has anyone run...
May 09, 2008
2001 Chevrolet Blazer Xtreme 4.3L Misfire VIN: 1GNCS18W31
P0303: Misfire Cylinder 3. Vehicle misfire at idle. Off idle vehicle smooth out. Misfire is very sutle. Fuel pressure is within norm. Fuel Injecto balance test is pretty much even. Customer had replaced cap rotors ignition wire set. Spark looks fine. I can hear a slight tapping noise co...
May 17, 2008
2001 Chevrolet Blazer Xtreme 4.3L Misfire VIN: 1GNCS18W31
P0303: Misfire Cylinder 3. Vehicle misfire at idle. Off idle vehicle smooth out. Misfire is very sutle. Fuel pressure is within norm. Fuel Injecto balance test is pretty much even. Customer had replaced cap rotors ignition wire set. Spark looks fine. I can hear a slight tapping noise co...
May 20, 2008
1998 Ford Windstar GL 3.8L MIL Lamp on VIN: 2FMDA5148W
P0303: 3 Cylinder miss. Codes p0303, p1512 & p1513 Customer complained of car miss fire and check engine light came on. Car runs fine now, but noticed oil in air cleaner. Checked IMRC gromets, ok, both hold vacuum, and move freely when taken off idle and when moved by hand. Check...
May 20, 2008