Plugs or Coils?

Discussion in 'N54' started by Tweedle335, Dec 19, 2016.

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  1. Last couple of times I've done hard pulls I've thrown the same codes. They are always misfire codes and I always get the rough idle with the SES light right when the codes are thrown. The only performance mod on my car is a jb4 on map 1. Is there any way to tell if this is my spark plugs or my could? I've read about problems with both, but is there a way to tell if it's one or the other?
     
  2. R.G.

    R.G. Sergeant

    352
    Henderson, NV
    E92 N54, F02 N54
    Real easy. Swap the coil from misfire cylinder to another cylinder. See if misfire follows coil.

    Welcome to the forum.
     
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  3. ATL-IS-N54

    ATL-IS-N54 Corporal

    Yes do this... Swap the misfiring cylinder coils to a proper firing cylinder and see if the problem follows, if it follows its 100% coil, if it doesn't it's 90% plug
     
  4. ATL-IS-N54

    ATL-IS-N54 Corporal

    I just did new plugs and a coil on cylinder 5, and a set of 6 coils just to have on deck for this motor...
     

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