Wrightbenz

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.

donpb

I'd check for vacuum leaks.

Wrightbenz

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

donpb

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

Wrightbenz

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

donpb

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

seanjordan20

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

donpb

But how does making a sharp turn instigate it though?

Wrightbenz

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.

donpb

That was a question for @seanjordan20 .