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P0303 Diagnostic Trouble Code Discussion for July 2011

Cylinder 3 Misfire Detected


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Trouble Ticket Help Requests for DTC P0303
Help Request Posted
2002 Honda Odyssey EX 3.5L Misfire VIN: 2HKRL18052
P0303: Cylinder 3 Misfire Detected. Good customer just bought used vehicle with check engine light on. Checked for codes and found misfires in cylinders 3,4, and 5. Suggested spark plugs because they were original. Removed and replaced - Spark plugs, cleared codes, test drove, shipped vehicle. N...
July 11, 2011
2002 Audi A4 Quattro 3.0L Misfire VIN: WAULT68E62
P0303: Cylinder 3 misfire. ... engine light,and was running rough. Found codes p0300, p0303. Verified cyl. 3 was misfiring. Installed 6 new plugs and a coil on cyl.3. Still misfires. Swapped coil with another cyl. And miss stays on cyl 3. Changed plug on cyl 3. Again, and no difference....
July 13, 2011
1997 Eagle Talon 2.0L MIL Lamp on VIN: 4E3AK24Y8V
P0303: Cylinder 3 Misfire Detected. Hello, sorry but this one may be lacking in some information but to be honest there is not a lot I have done due to the fact that this car has no plates on it, it is here from another shop looking for help on it. The vehicle runs fine every time we run it, and...
July 13, 2011
1998 Audi A6 Quattro 2.8L Misfire, MIL Lamp on VIN: WAUBA34B9W
P0303: Cyl 3 misfire. Hello All! Im at my wits end here. Have worked extensively on Audi and is my main focus- this one has me up a creek. Bought this POS from a customer for $1400. In need of tune-up / maintenance... 1 year later and $3k in parts / labor and it STILL misfires on...
July 15, 2011
1999 BMW 323i 2.5L Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: WBAAM3338X
Hello all, I need some help on my wifes car.I just bought this thing,it will run fine until check engine light comes on.Missfire codes and lean codes.I replaced the vent valve and hoses as usual problem areas\.Also replaced the plugs and coils while doing the ...
July 19, 2011
2002 Honda Odyssey EX 3.5L Misfire VIN: 2HKRL18052
P0303: Cylinder 3 Misfire Detected. Good customer just bought used vehicle with check engine light on. Checked for codes and found misfires in cylinders 3,4, and 5. Suggested spark plugs because they were original. Removed and replaced - Spark plugs, cleared codes, test drove, shipped vehicle. N...
July 19, 2011
2000 Jeep Cherokee Classic 4.0L Misfire, MIL Lamp on VIN: 1J4FF48S4Y
P0303: Cylinder 3 Misfire Detected. Ign coil replaced at different shop for intermittent misfire. Still had intermittent misfire. When misfire starts and ignition is turned off and restarted misfire goes away. Misfire will come back at any time. Can not find any bad wires and everything test ok....
July 20, 2011
2003 Toyota Corolla CE 1.8L Poor Idle Quality VIN: 1NXBR43E23
P0303: Cylinder 3 Misfire Detected. hey whats up guys im having trouble with this toyota, the car came in with all these codes, i decided to check fuel system , had a bad fuel pump. check it with scope bad waveform, but the car still runs really bad on idle , [...] at 0volts both all the time , ...
July 26, 2011
2000 Ford Taurus SE 4-Valve 3.0L Poor Idle Quality, Misfire VIN: F14SD14S8Y
P0303: missfire number 3 cyl. missfire is still there. this is the back cyl so hard to get to. checked comp. good 230 in all cylinders but number 5 had 200 still ok. has spark and injector pulse. did running comp and number 3 was 25 psi lower then number 4 cylinder. pulled upper intake and...
July 29, 2011
2001 Jeep Cherokee Limited 4.0L Misfire VIN: 1J4FF58S71
P0303: Cylinder 3 Misfire Detected. This is a strange one we have been dealing with this for a while. This jeep belongs the shop receptionist/cashier. Intermittently on hot days 85 degrees and up cylinder 3 will start to miss. After hot soak on restart is when miss starts at times reving engine ...
July 29, 2011
2002 Honda Odyssey EX 3.5L Misfire VIN: 2HKRL18052
P0303: Cylinder 3 Misfire Detected. Good customer just bought used vehicle with check engine light on. Checked for codes and found misfires in cylinders 3,4, and 5. Suggested spark plugs because they were original. Removed and replaced - Spark plugs, cleared codes, test drove, shipped vehicle. N...
July 11, 2011
2002 Audi A4 Quattro 3.0L Misfire VIN: WAULT68E62
P0303: Cylinder 3 misfire. ... engine light,and was running rough. Found codes p0300, p0303. Verified cyl. 3 was misfiring. Installed 6 new plugs and a coil on cyl.3. Still misfires. Swapped coil with another cyl. And miss stays on cyl 3. Changed plug on cyl 3. Again, and no difference....
July 13, 2011
1997 Eagle Talon 2.0L MIL Lamp on VIN: 4E3AK24Y8V
P0303: Cylinder 3 Misfire Detected. Hello, sorry but this one may be lacking in some information but to be honest there is not a lot I have done due to the fact that this car has no plates on it, it is here from another shop looking for help on it. The vehicle runs fine every time we run it, and...
July 13, 2011
1998 Audi A6 Quattro 2.8L Misfire, MIL Lamp on VIN: WAUBA34B9W
P0303: Cyl 3 misfire. Hello All! Im at my wits end here. Have worked extensively on Audi and is my main focus- this one has me up a creek. Bought this POS from a customer for $1400. In need of tune-up / maintenance... 1 year later and $3k in parts / labor and it STILL misfires on...
July 15, 2011
1999 BMW 323i 2.5L Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: WBAAM3338X
Hello all, I need some help on my wifes car.I just bought this thing,it will run fine until check engine light comes on.Missfire codes and lean codes.I replaced the vent valve and hoses as usual problem areas\.Also replaced the plugs and coils while doing the ...
July 19, 2011
2002 Honda Odyssey EX 3.5L Misfire VIN: 2HKRL18052
P0303: Cylinder 3 Misfire Detected. Good customer just bought used vehicle with check engine light on. Checked for codes and found misfires in cylinders 3,4, and 5. Suggested spark plugs because they were original. Removed and replaced - Spark plugs, cleared codes, test drove, shipped vehicle. N...
July 19, 2011
2000 Jeep Cherokee Classic 4.0L Misfire, MIL Lamp on VIN: 1J4FF48S4Y
P0303: Cylinder 3 Misfire Detected. Ign coil replaced at different shop for intermittent misfire. Still had intermittent misfire. When misfire starts and ignition is turned off and restarted misfire goes away. Misfire will come back at any time. Can not find any bad wires and everything test ok....
July 20, 2011
2003 Toyota Corolla CE 1.8L Poor Idle Quality VIN: 1NXBR43E23
P0303: Cylinder 3 Misfire Detected. hey whats up guys im having trouble with this toyota, the car came in with all these codes, i decided to check fuel system , had a bad fuel pump. check it with scope bad waveform, but the car still runs really bad on idle , [...] at 0volts both all the time , ...
July 26, 2011
2000 Ford Taurus SE 4-Valve 3.0L Poor Idle Quality, Misfire VIN: F14SD14S8Y
P0303: missfire number 3 cyl. missfire is still there. this is the back cyl so hard to get to. checked comp. good 230 in all cylinders but number 5 had 200 still ok. has spark and injector pulse. did running comp and number 3 was 25 psi lower then number 4 cylinder. pulled upper intake and...
July 29, 2011
2001 Jeep Cherokee Limited 4.0L Misfire VIN: 1J4FF58S71
P0303: Cylinder 3 Misfire Detected. This is a strange one we have been dealing with this for a while. This jeep belongs the shop receptionist/cashier. Intermittently on hot days 85 degrees and up cylinder 3 will start to miss. After hot soak on restart is when miss starts at times reving engine ...
July 29, 2011