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2015 T&C Misfire Cylinder 3

Old 06-17-2019, 12:32 PM
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Default 2015 T&C Misfire Cylinder 3

I have a 2015 Town and Country with a misfire on cylinder 3, that I have been unsuccessful in fixing. It is the 3.6 liter. You can hear and feel it during Idle, but it seems fine at highway speeds. The vehicle has about 80,000 miles on it and has been well cared for. It is only showing the single code P0303, and no others.

What I have tried so far-

1- Seafoam, then a week later MMO.
2-Changed plugs (all looked like pretty normal wear, but changed anyway with oem)
3- New coil cylinder 3.
4- Swapped coils from a known good cylinder position
5- Inspected fuel injectors, tested, and swapped fuel injector from a know good cylinder location
6- Continuity check in wiring from injector to main connector and coil to main connector. Both checked good.
7- Compression tested @ about 160psi all cylinders.
7- Checked dealer powertrain warranty and unfortunately it is out of warranty so I am on my own now!!

Any suggestions, where to start? From what I read it sounds like a valve or lifter issue. When I swapped things around I could not get the misfire to move to another cylinder. You can definitely hear the miss when idling.

Needs some help before I take in to dealer.


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