Other cars used to have a device that sensed vehicle roll-over. When the vehicle rolled, the fuel pump would not work.
Sometimes the device would fail, preventing flow of gas.
Hope this helps. I no longer have a Z4M, and don't know if this applies...but thought I would share just in case.
My wife's cars
: '06 Z4M Roadster, sold.'03-M3 Cab/SMG/Dinan(Sold); '07 335 Cab Sold. '91 850i, chipped; 911 C4S Cab... I'm the Navigator, capable of getting us lost at any time! Drives are longer!
Last edited by 2mnycars; 04-05-2012 at 03:26 PM.