BMW x5 2005 4.4 unknown problem
 

So after changing 8 coils and mass airflow sensor..and $ 1,400 later my love is still acting up. This happens mostly in the morning. I start it..it settles and starts shaking, sometimes goes away after a re-start, sometimes check engine light comes on. Now they are cleaning up the injection system... Anyone else has had this problem???? It went for days without shaking, and then one day starts again...they said i've had many misfires on both sides even after all they have done to the car..back in the shop since saturday once again..:(

Help!!!

Hey, first, welcome on board.

I have the same symptons before, and the next thing that'll happen is, oh boy, you won't believe me, but it happened on my 01 3.0i, it blew my engine cover gasket and oil gushed out from there lighted up when in contact with exhaust manifold.

GL

when the service engine soon (SES) light comes on, what codes are you getting?

this sounds like a vacuum leak, check the hoses that run to the brake booster and all associated vacuum lines. The vacuum lines that run to the brake booster can look fine and hide a break easily.

that sounds like you had a frozen or plugged oil separator.

Yeah just for fun change your oil separators... it's around $35 and takes about 15 minutes to do both of them.
My 05 4.4i was studdering a bit in the AM, then I changed them out and it's been great ever since.

how many miles on the ride ? thx

ohhh greattt!

66,700

The guy will call me back with the error codes...now they are cleaning the injection system...for some reason i have doubts that will fix the problem.
I did telll them what you guys wrote here..check the oil seperators and that possibly a vacuum leak...Im a girl..i dont think they take me seriously ...

GRRRRR