When driving along the engine will quite regulary loose all acceleration but not stall. It will then come back withing a couple of seconds. It you are driving on the motorway, this can be very annoying when overtaking! Somtimes when you pull up to traffic light or a roundabout, the engine will completly stall. When this is happening you can dip the clutch, hold your foot on the accelerator in the same position and watch the revs rising and falling of their own accord.