Misfire

2015 DODGE CHARGER
150,000 MILES • 3.6L • AUTOMATIC
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CAMM P
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  • 1 POST
The car has had new ignition coils , spark plugs , injectors , but the problem still consist of cylinder #2 misfiring I can unplug the coil while car is running nothing changes I swapped with known good coil and runs perfectly for about 3 minutes and immediately starts misfiring again so I moved another good coil runs perfectly for about 3 min same thing and when you first start it in mornings it runs a perfect till it gets close to temp but it cuts power to coil all together I’m lost only thing I can think is pcm has a internal failure. I’ve pulled it off and put the pcm in freezer for about 5 hours put it on car and ran perfectly for about an hour and back to the same misfire
Video (Click to enlarge)
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Sep 24, 2026 at 8:13 AM
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MECHTRIX
  • ✓Experienced Mechanic
  • 478 POSTS
Here are a few ideas Did you try a brand new spark plug and is it tight in that cylinder ? Could also be the ground
/ signal wires for that coil
Check at the coil and the ecu too just to make sure good luck hope this helps
Sep 24, 2026 at 11:04 AM
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MECHTRIX
  • ✓Experienced Mechanic
  • 478 POSTS
If you che the few things i mentioned and you dont see anything there then check the fuel injector for the cylinder ..it could be failing ..since youre getting a code that saying its to rich could be dumping fuel or starving it of fuel after a few mins it start to fail just cant stay in sync somtimes ..only priblem is the codes aren't specified and I cant make out the video...so maybe erase the codes amd see wich ones return that way youl get a better idea . good luck
Sep 24, 2026 at 11:12 AM
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MECHTRIX
  • ✓Experienced Mechanic
  • 478 POSTS
Once you erase the codes and reset the ecu ..if you get any more please post then here..and well try to help ..thanks good luck
Sep 24, 2026 at 12:23 PM
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MECHTRIX
  • ✓Experienced Mechanic
  • 478 POSTS
Once you erase the codes and reset the ecu ..if you get any more codes please post them here..and well try to help ..thanks good luck
Sep 24, 2026 at 1:27 PM
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