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P0303 Diagnostic Trouble Code Discussion for December 2019

Cylinder 3 Misfire Detected

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Trouble Ticket Help Requests for DTC P0303
Help Request Posted
2015 Ram 1500 Laramie Limited 5.7L Misfire VIN: 1C6RR7NT8F
P0303: misfire 3. ... on #3. I replaced the engine w reman, all assoc parts, new factory correct spark plugs, cust had replaced a couple of coils w aftermarket, not sure where those landed when put back together. Ran good. 10 thousand miles later had P0303, P2308. Replaced...
December 10, 2019
2012 Subaru Impreza WRX 2.5L Misfire VIN: JF1GV7F6XC
... coils and plugs. What we noticed is off idle it seems to drive fine and will not set any codes. If you let it idle it will set p0301/p0302/p0303/p0304.The adaptives are acting strange. ...
December 10, 2019
2008 Kia Rondo LX 2.7L Misfire, MIL Lamp on VIN: KNAFG52618
P0303: Cyl 3 Misfire. ... the misfire codes will set (P0303 & P0305) and you can feel the vehicle start to misfire. At this time the #3 and #5 injectors are not being grounded and the scan data says 0 ms for the injector on time. I'm assuming it's because the ECM is shuttin...
December 13, 2019
2010 GMC Acadia SLT 3.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GKLVNED1A
P0303: Cyl 3 miss. I bought this car with this problem. Runs great on start up, until warm. Then at idle only, you can feel a slight rough idle. Eventually it sets 1-3-5 misfire codes simultaniously. If it is really cold outside (below 0F) it will not run rough, even after 5...
December 19, 2019