#4 cylinder missing
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Thread: #4 cylinder missing

  1. #1
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    Default #4 cylinder missing

    2016 200. The engine is idling rough and hesitates quite a bit while driving. I did a scan on the computer and came up with a code, don't recall the exact #, for # 4 cylinder coil pack being bad. Changed the plugs and the # 4 coil pack and the issue improved slightly but still missing when the engine is accelerating. Any ideas?

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    Mileage on the car?
    Getting the actual code(s) would help...

    You might check for a "pulse" at the #4 cylinder coil pack using a "noid" or an oscilloscope... Chryslers have had problems with ECMs (engine control modules) over the years driving the coil packs but confirmation is a must...

    Also substituting a coil pack from another cylinder can save you from buying a coil pack... If the coil pack failure moves to the other cylinder then it is bad...If it doesn't move (from #4) then the coil packs are OK and you need to look for the problem elsewhere...

    If the engine has high mileage you could have a bad fuel injector or a burnt exhaust valve...Moving the injectors like the coil packs can help diagnose your problem(s) also
    Dave

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    Quote Originally Posted by jimmym504 View Post
    2016 200. The engine is idling rough and hesitates quite a bit while driving. I did a scan on the computer and came up with a code, don't recall the exact #, for # 4 cylinder coil pack being bad. Changed the plugs and the # 4 coil pack and the issue improved slightly but still missing when the engine is accelerating. Any ideas?
    I had the same thing happen.

    The above advice is what I would do. Mine was because I didn't fully seat the coil, you'd think the screw holding it down would ensure that but it can still be not fully connected to the plug even with the screw on.

    3.6 V6? If so, remove the foam entirely under the plenum before install/uninstall.
    Last edited by Black Knight; 06-07-2019 at 03:13 PM.
    "Black Knight" was my father's trucker CB handle.

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    77,000 miles. The thing is it is not a constant problem. If I am merging into traffic and accelerate it may or may not miss. If it does miss and I hold acceleration it eventually goes away and runs normal or if i decrease acceleration a bit it will also go away.

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    Its the 4cyl. I will check and make sure the coil is installed correctly.

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    Make sure you have the right plugs. The PZEV engine takes platinum plugs, the non-PZEV engine takes regular copper plugs.

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