What a week

Silly fault after silly fault !!

Any ideas on this please,can drive car 5 days and one day it will stall a time or two,not had it myself, had apprentice drive it and it stalled, but once and we did not have anything hooked up to monitor, we have since but not faulted yet,can leave p1327, i have fitted new ngk plugs and have swopped ignition coil with a new one but it still happens and cleaned ecu pins etc. Its too random at present but wondered if anyone has had this and found a cure

Thanks George..