So my 08 550i has a weird little sputter/stumble when I turn in sharply. The car doesn’t stall or anything I can just feel a slight miss or stumble. I did a search but didn’t see any common themes in this. Anyone have any ideas ?
No check lights or anything obvious. Car if stock other than a k&n filter which came with the car. Changed the coils and plugs today as a maintenance item since they looked to be original and the car is at 128k. Car runs good other than this minor hiccup.

 

I'd check for vacuum leaks.

 

yeah that’s a thought. The car runs really good though this is just a random thing when I turn a sharp corner.

 

Same thing happened to me, drove fine until I made a sharp turn. Last thing I expected was a vacuum leak.

 

Thats interesting. Yours was a 550i as well ? Do you remember where the leak was ?

 

I have a 530i. Mine was the crankcase vent hose, but that's not the only place you can have a vacuum leak.

 

Sounds like a leak to me. That's the only time I get stumbling. Twice it's happened to me in different places. I have a make shift smoke machine and it hasn't failed me yet

 

But how does making a sharp turn instigate it though?

 

Right this was what I was thinking. Vac leak still seems like a valid possibility I will have a look this evening see if I can find anything.

 

That was a question for @seanjordan20 .