I need help. I did a complete spark plug and coil swap on my 2016 m235. Sitting at about 103k miles. This was done in prevent and the car ran perfect prior.

Now, I am having a misfire on cylinder 2 and the idle is atrocious. I have swapped coils, the misfire doesn’t follow. I swapped the new plugs back to old, same cyl 2 code and the idle is even worse.

I truly have no clue what to do at this point and don’t really understand how the car is now running like a bag of shit after it being perfect this morning.

Edit:: I’m now getting multiple misfire codes after putting all old coils and plugs back in. I’m at a total loss.

Please help me figure this out.

  • Alternative_Leader91@alien.topOPB
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    1 year ago

    Based on service history, plugs at 70k (just prior to me purchasing)

    I don’t see coils anywhere so I guess there’s chance they were original, which is partly why I wanted to go ahead and do them with the plugs.

    Bingo on the tune. I’m punching myself in the face rn over not buying my own tune the day I bought it. Boy what I would do for the info bm3 provides.

    I have not had a shop look at the DME. Suppose I should ask them to do that when I drop it off, yeah?

    • Spidaaman@alien.topB
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      1 year ago

      Yeah I would definitely let them know the deal, as much as you know. Did you just not have a PPE done before you bought it?

      • Alternative_Leader91@alien.topOPB
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        1 year ago

        Will do. Independent, no. (I know, my situation keeps looking worse).

        The dealer I bought it from (non bmw) had it serviced and prepped for sale at a neighboring bmw dealership AND did their own inspection prior to sale, so I didn’t feel the need. Lesson learned on that accord. Not worth the risk of future uncertainty.

        • Spidaaman@alien.topB
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          1 year ago

          Gotcha. Well hopefully it’s not a big deal, like just needing a new injector. Definitely see if they can help you figure out the tune/DME situation.

          And who knows, you could find a great new Indy shop near your parents for the future.