I have a 2015 Chrysler 200 S V6 automatic 85,000 miles. Check engine light came on and had AutoZone read the code. Misfire on cylinder 5. I changed all the spark plugs with NGK laser iridium and put a new coil on cylinder 5. The check engine light was off because I disconnected the battery when I did my repairs. I go to the store later that evening and the check engine light came back and still says misfire on cylinder 5. The car runs perfectly fine doesn’t idle rough or run crappy. No signs of any kind of power loss. What should I try next? Thank you.
Start with out Misfire sticky under our FAQ page:
https://carkiller.com/scottykilmer/qa/misfire-4/
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Since the misfire is specific to cylinder 5 and you only installed a new coil on that cylinder try swapping that coil with one from another cylinder. If the P0305 is still stuck on cylinder 5, then try swapping the wires going to the coil and see if the misfire moves to another cylinder.
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Other issues specific to that cylinder could be clogged/malfunctioning fuel injector (could try swapping with another cylinder).
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Worst case would be Poor cylinder compression due to:
- Worn out or failed piston rings
- Worn out or scored cylinder walls
- Dirty or worn out valves and seats
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You would need to perform a dry and wet compression test on all cylinders to know for sure.
So the check engine light comes and goes? But when it comes on it’s always misfire on cylinder 5. So could it be a short in the wire connected to 5th cylinder coil? And is it possible to install a new wire kit for all the coils?
See my original comment above.
Please see the FAQ and let us know if it helped
