Misfiring after removing and replacing charge pipe

[Edrift]

So today I was playing around and removed the charge pipe to take a closer look at the sound generator.

After reinstalling everything and starting up the car it pretty much started misfiring on cylinder 3 right away.

I have never had this issue before.

Pure coincidence or is it possible the removal and replacement of the charge pipe/air box caused this?


Also yesterday I changed the oil and filter too if that's relevant or not.


I cleared the codes and started the engine again and it was misfiring at idle too.

This is on my n54 2008 135i.

[Edrift]

Ok this is the biggest coincidence in the history of things.
I swapped coil pack 3 to 4 and the misfire followed.
Guessing the coil pack is dead.

I thought I broke something when simply removing and replacing the charge pipe!

Will order a replacement and see how I go

[NorthernDancer]

Always try to keep 2 or 3 used but known good coils as spares in the trunk. For that time you may be very far from a garage and a mis-fire pops up.

[Edrift]

Originally Posted by NorthernDancer

Always try to keep 2 or 3 used but known good coils as spares in the trunk. For that time you may be very far from a garage and a mis-fire pops up.

Yes I think I'll be doing that, if not replacing all the coils!

Will need to keep a toolkit in the car