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P0303 Diagnostic Trouble Code Discussion for May 2013

Cylinder 3 Misfire Detected


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Trouble Ticket Help Requests for DTC P0303
Help Request Posted
2002 Porsche 911 Carrera 3.6L Misfire VIN: WP0CA29962
P0303: Misfire cylinder 3. ... engine would crank normally but not start with no stored codes. Customer stated that car began to misfire while driving home and when he attempted to start it the following morning the engine would crank but not start. After a short test we replaced the fu...
May 06, 2013
2005 Scion tC (Car) 2.4L Poor Idle Quality, Misfire VIN: JTKDE17795
Hey guys, I feel like this one's staring me in the face and I just can't get it. It has a random miss at idle that affects all cylinders and the kicker is it goes away and PURRS when I add 20% injector volume on my scanner. Lean miss, right? No specific cylind...
May 06, 2013
2005 Scion tC (Car) 2.4L Poor Idle Quality, Misfire VIN: JTKDE17795
Hey guys, I feel like this one's staring me in the face and I just can't get it. It has a random miss at idle that affects all cylinders and the kicker is it goes away and PURRS when I add 20% injector volume on my scanner. Lean miss, right? No specific cylind...
May 07, 2013
1999 Volkswagen EuroVan MV 2.8L Hesitation, Misfire, MIL Lamp on VIN: WV2MH2704X
P0303: Cylinder 3 misfire. Thank all of you in advance for your time and input! One of our customers is in the car flipping business and brought us this van to go through. When we first got the van we found the engine started right up but missfired badly on cylinders 1 and 6. We repla...
May 07, 2013
2002 Chevrolet Silverado 1500 5.3L Poor Idle Quality, Cuts out, Misfire, MIL Lamp on VIN: 2GCEK19T22
P0303: misfire. miss at idle and under light load. miss is all bank one, moved coils, plugs, wires, cleaned injector rail, moved injectors, bank 1 and bank 2 o2 sensors, all of them to other side. no change. replaced fuel filter. b1s2 reads 800 and b2s2 reads around zero. rep...
May 09, 2013
2005 Ford Expedition XLS 5.4L Misfire, MIL Lamp on VIN: 1FMPU13595
P0303: misfire3. Hey guys this car came to me after another shop replace all the parts that I have listed in order to fix an intermitten engine misfire.the truck will run fine on start up only untill you let it warm up itll start misfiring on cyl.#3&4 that show up in the c...
May 10, 2013
2006 Audi A3 2.0L Misfire, MIL Lamp on VIN: WAUMF78P26
Hello Audi/VW Techs. This A3 has a pattern of running rough and misfiring for about 30 seconds when cold, then it runs perfect all day. High and low fuel pressure are within specs. Coils have been updated. The interesting thing is that when it runs rough my re...
May 14, 2013
2004 Saab 9-3 Arc 2.0L MIL Lamp on VIN: YS3FD79YX4
P0303: Misfiring Cylinder 3. ... Trigg, Coil 3 to CDM, Open/Short), and P0303 (Misfiring, Cylinder 3) present. Car ran fine. Checked plugs, ignition wiring with no evidence of problems. Replaced #3 ignition coil. Noticed coolant overflow nipple cracked a...
May 14, 2013
2007 Volkswagen Beetle 2.5 2.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: 3VWRG31Y27
P0303: Cyl 3 misfire. Hello Everyone, I have a vehicle that idles rough and misfires when cold. After it warms up for about 45 seconds it run fine. We replace spark plugs and mass air flow sensor and that didn't help. I was wondering if someone can lead us in the right direction. W...
May 14, 2013
2005 Audi A4 Quattro Cabriolet 3.0L Misfire, MIL Lamp on VIN: WAUET48H15
P0303: cyl 3 misfire. I have an audi a4 that came to me after audi diagnosed as a catalyst problem. fast forward bank 1 catalyst installed same problem. will not miss at idle.driving down highway cel flashes until u hit a steady speed then goes out. snap on verus expert mode says 1...
May 15, 2013
2008 Mini Cooper S 1.6L Poor Idle Quality, MIL Lamp on VIN: WMWMF73538
This car came in for check engine light and poor idle. Car idles poorly but runs great going down the road. I have smoked it several times and not found any vacuum leaks. Spark plugs look good and are correct. The fuel pressure readings on data stream seem goo...
May 15, 2013
2006 Audi A3 2.0L Misfire, MIL Lamp on VIN: WAUMF78P26
Hello Audi/VW Techs. This A3 has a pattern of running rough and misfiring for about 30 seconds when cold, then it runs perfect all day. High and low fuel pressure are within specs. Coils have been updated. The interesting thing is that when it runs rough my re...
May 16, 2013
2004 Saab 9-3 Arc 2.0L MIL Lamp on VIN: YS3FD79YX4
P0303: Misfiring Cylinder 3. ... Trigg, Coil 3 to CDM, Open/Short), and P0303 (Misfiring, Cylinder 3) present. Car ran fine. Checked plugs, ignition wiring with no evidence of problems. Replaced #3 ignition coil. Noticed coolant overflow nipple cracked a...
May 16, 2013
2004 Audi A6 Quattro 3.0L Misfire VIN: WAULT64B34
This car will set the lean code after 2 trips. occas has slight missfire, more cold. runs well warm. The crank case vent valve has been replaced yet there is excessive vac in crankcase. If you remove the oil fill cap the engine runs poor and almost stalls. It ...
May 23, 2013
1997 Cadillac Catera 3.0L Misfire VIN: W06VR54R9V
P0303: Cylinder 3 Misfire Detected. Thanks for reading. Car came in with coolant leak. Battery was dead so I never started the car. Pressure tested the cooling system. Had head gasket leak to outside. Customer had driven in car so I assumed it ran ok. After head gaskets were replaced started car...
May 23, 2013
2005 Audi A4 Quattro Cabriolet 3.0L Misfire, MIL Lamp on VIN: WAUET48H15
P0303: cyl 3 misfire. I have an audi a4 that came to me after audi diagnosed as a catalyst problem. fast forward bank 1 catalyst installed same problem. will not miss at idle.driving down highway cel flashes until u hit a steady speed then goes out. snap on verus expert mode says 1...
May 24, 2013
2002 Dodge Ram 1500 Truck ST 4.7L Surge, Misfire, MIL Lamp on VIN: 3D7HU18N42
P0303: Cylinder 3 Misfire Detected. This began approx 4 to 5 months ago, cust stated truck ran a little rough and cel would come on. I found the four codes for cyl 1,3,5,7, misfire codes however never felt a misfire or rough idle. After this happened 3 or 4 times I started to try and fix it, all...
May 28, 2013
2002 Porsche 911 Carrera 3.6L Misfire VIN: WP0CA29962
P0303: Misfire cylinder 3. ... engine would crank normally but not start with no stored codes. Customer stated that car began to misfire while driving home and when he attempted to start it the following morning the engine would crank but not start. After a short test we replaced the fu...
May 06, 2013
2005 Scion tC (Car) 2.4L Poor Idle Quality, Misfire VIN: JTKDE17795
Hey guys, I feel like this one's staring me in the face and I just can't get it. It has a random miss at idle that affects all cylinders and the kicker is it goes away and PURRS when I add 20% injector volume on my scanner. Lean miss, right? No specific cylind...
May 06, 2013
2005 Scion tC (Car) 2.4L Poor Idle Quality, Misfire VIN: JTKDE17795
Hey guys, I feel like this one's staring me in the face and I just can't get it. It has a random miss at idle that affects all cylinders and the kicker is it goes away and PURRS when I add 20% injector volume on my scanner. Lean miss, right? No specific cylind...
May 07, 2013
1999 Volkswagen EuroVan MV 2.8L Hesitation, Misfire, MIL Lamp on VIN: WV2MH2704X
P0303: Cylinder 3 misfire. Thank all of you in advance for your time and input! One of our customers is in the car flipping business and brought us this van to go through. When we first got the van we found the engine started right up but missfired badly on cylinders 1 and 6. We repla...
May 07, 2013
2002 Chevrolet Silverado 1500 5.3L Poor Idle Quality, Cuts out, Misfire, MIL Lamp on VIN: 2GCEK19T22
P0303: misfire. miss at idle and under light load. miss is all bank one, moved coils, plugs, wires, cleaned injector rail, moved injectors, bank 1 and bank 2 o2 sensors, all of them to other side. no change. replaced fuel filter. b1s2 reads 800 and b2s2 reads around zero. rep...
May 09, 2013
2005 Ford Expedition XLS 5.4L Misfire, MIL Lamp on VIN: 1FMPU13595
P0303: misfire3. Hey guys this car came to me after another shop replace all the parts that I have listed in order to fix an intermitten engine misfire.the truck will run fine on start up only untill you let it warm up itll start misfiring on cyl.#3&4 that show up in the c...
May 10, 2013
2006 Audi A3 2.0L Misfire, MIL Lamp on VIN: WAUMF78P26
Hello Audi/VW Techs. This A3 has a pattern of running rough and misfiring for about 30 seconds when cold, then it runs perfect all day. High and low fuel pressure are within specs. Coils have been updated. The interesting thing is that when it runs rough my re...
May 14, 2013
2004 Saab 9-3 Arc 2.0L MIL Lamp on VIN: YS3FD79YX4
P0303: Misfiring Cylinder 3. ... Trigg, Coil 3 to CDM, Open/Short), and P0303 (Misfiring, Cylinder 3) present. Car ran fine. Checked plugs, ignition wiring with no evidence of problems. Replaced #3 ignition coil. Noticed coolant overflow nipple cracked a...
May 14, 2013
2007 Volkswagen Beetle 2.5 2.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: 3VWRG31Y27
P0303: Cyl 3 misfire. Hello Everyone, I have a vehicle that idles rough and misfires when cold. After it warms up for about 45 seconds it run fine. We replace spark plugs and mass air flow sensor and that didn't help. I was wondering if someone can lead us in the right direction. W...
May 14, 2013
2005 Audi A4 Quattro Cabriolet 3.0L Misfire, MIL Lamp on VIN: WAUET48H15
P0303: cyl 3 misfire. I have an audi a4 that came to me after audi diagnosed as a catalyst problem. fast forward bank 1 catalyst installed same problem. will not miss at idle.driving down highway cel flashes until u hit a steady speed then goes out. snap on verus expert mode says 1...
May 15, 2013
2008 Mini Cooper S 1.6L Poor Idle Quality, MIL Lamp on VIN: WMWMF73538
This car came in for check engine light and poor idle. Car idles poorly but runs great going down the road. I have smoked it several times and not found any vacuum leaks. Spark plugs look good and are correct. The fuel pressure readings on data stream seem goo...
May 15, 2013
2006 Audi A3 2.0L Misfire, MIL Lamp on VIN: WAUMF78P26
Hello Audi/VW Techs. This A3 has a pattern of running rough and misfiring for about 30 seconds when cold, then it runs perfect all day. High and low fuel pressure are within specs. Coils have been updated. The interesting thing is that when it runs rough my re...
May 16, 2013
2004 Saab 9-3 Arc 2.0L MIL Lamp on VIN: YS3FD79YX4
P0303: Misfiring Cylinder 3. ... Trigg, Coil 3 to CDM, Open/Short), and P0303 (Misfiring, Cylinder 3) present. Car ran fine. Checked plugs, ignition wiring with no evidence of problems. Replaced #3 ignition coil. Noticed coolant overflow nipple cracked a...
May 16, 2013
2004 Audi A6 Quattro 3.0L Misfire VIN: WAULT64B34
This car will set the lean code after 2 trips. occas has slight missfire, more cold. runs well warm. The crank case vent valve has been replaced yet there is excessive vac in crankcase. If you remove the oil fill cap the engine runs poor and almost stalls. It ...
May 23, 2013
1997 Cadillac Catera 3.0L Misfire VIN: W06VR54R9V
P0303: Cylinder 3 Misfire Detected. Thanks for reading. Car came in with coolant leak. Battery was dead so I never started the car. Pressure tested the cooling system. Had head gasket leak to outside. Customer had driven in car so I assumed it ran ok. After head gaskets were replaced started car...
May 23, 2013
2005 Audi A4 Quattro Cabriolet 3.0L Misfire, MIL Lamp on VIN: WAUET48H15
P0303: cyl 3 misfire. I have an audi a4 that came to me after audi diagnosed as a catalyst problem. fast forward bank 1 catalyst installed same problem. will not miss at idle.driving down highway cel flashes until u hit a steady speed then goes out. snap on verus expert mode says 1...
May 24, 2013
2002 Dodge Ram 1500 Truck ST 4.7L Surge, Misfire, MIL Lamp on VIN: 3D7HU18N42
P0303: Cylinder 3 Misfire Detected. This began approx 4 to 5 months ago, cust stated truck ran a little rough and cel would come on. I found the four codes for cyl 1,3,5,7, misfire codes however never felt a misfire or rough idle. After this happened 3 or 4 times I started to try and fix it, all...
May 28, 2013