bugeyebizzle

only recently had stage 3 remap done on my car and i had complete engine cut out when driving the other day and had to get towed home , i had diagnostic machine on it and it come up with MAF sensor which ive changed and problem is still there , it will start and it will stay running if i blip the throttle but will not idle and just cut out , im waiting on software to connect laptop to ecu and see if anymore faults come up today but could do with some advice on tests i could run etc or has anyone else had this problem ?