You need to state year, which engine you have, and mileage to start. I also recommend just putting this in your sig so the info is there when you ask for help in the future.

Is the check engine light on?

Gonna take a quick guess and say check your intake boot at the throttle body or look for cracks in the intake boot at the flex part of the boot.

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2002 X5 4.6 Sold
Dinan CAI, TB, Mass Air, Stage 4 engine & tranny software, X-pipe
2004 745Li
1997 Ford Mustang Cobra Vert
1985 Mazda RX-7
13B-REW single turbo 60-1, Haltech, Meth injection, MSD Ignition, and much more
2008 Mazda Speed3 Hypertech Tune