Have an astra where the engine periodically stops for between 1 and 2 minutes. Not affected by hot or cold engine. Sometimes when engine stops it can be restarted but only runs for around 20 seconds - then experience dead period. (This is the only indication problem may be about to happen, but often there is no warning). Tried starting with foot on floor and pumping throttle - no fuel cloud out of exhaust when it does finally start. Runs perfectly afterwards. Have replaced fuel filter and other bits. Can hear fuel pump and relay switching so believe fuel system pressurised.
Fault can re-occur anytime between a few days and a few months but there doesn't seem to be any pattern. Car has been regularly maintained and has done just over 44000 miles. Runs normally once started