Help! My 320i Automatic seems to start OK but when driving along it loses power and cuts out or it revs high when the accelerator is pushed but does not seem to be in gear. The problem was first noticable when I swithced the car on one day and the need started fluctuating crazily when the car even the engine wasn't running! Please help me! (I have a cobra alarm installed if its any help - could this be causing it?) Thanks in advance