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P0303 Diagnostic Trouble Code Discussion for September 2018

Cylinder 3 Misfire Detected


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Trouble Ticket Help Requests for DTC P0303
Help Request Posted
2007 Hyundai Accent SE 1.6L Misfire VIN: KMHCN35C87
P0303: Cylinder 3 Misfire Detected. ... light, code p0303.Test drove no misfire. Did the normal, checked plugs they were new. Swapped #3 plug to #2, swapped coil to #4. Noticed coil was new. After it sat a couple hours, I jumped in for another go and when I was backing out it misfired a few ...
September 07, 2018
2001 Jaguar Vanden Plas 4.0L Misfire VIN: SAJDA24C21
P0303: Misfire 3. Sometime at idle, restricted exhaust warning message pop up on dash and mis fire bad for about 5 seconds. It would smooth out for hours. Turn off car and take a lunch break. Went on the freeway and same problem occur on freeway. Does anyone experience this...
September 07, 2018
2008 Chevrolet HHR SS 2.0L Poor Idle Quality VIN: 3GNCA63X48
P0303: 3 Misfire. ... smelled as if raw fuel was passing through the engine, Had a code for the high pressure pump & a P0303. I swapped coils & plugs with no change, Misfire stayed on #3 My intuition told me the #3 cyl. probably had a bad injector dumping too much g...
September 10, 2018
2007 Hyundai Accent SE 1.6L Misfire VIN: KMHCN35C87
P0303: Cylinder 3 Misfire Detected. ... light, code p0303.Test drove no misfire. Did the normal, checked plugs they were new. Swapped #3 plug to #2, swapped coil to #4. Noticed coil was new. After it sat a couple hours, I jumped in for another go and when I was backing out it misfired a few ...
September 15, 2018
2006 Toyota Sienna LE 3.3L Misfire VIN: 5TDZA23C26
P0303: Cylinder 3 Misfire Detected. I have a toyo sienna that i replaced the heads and timing belt on and now i have a cyl 3 misfire at idle. I got 160psi on 3 and 180 on 1&5. I've double checked the timing marks and i got good spark at cyl 3. I moved all parts from cyl 3 to cyl 2 and no...
September 24, 2018