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_Leader91OPBEnglish
    1·
    10 months 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?