The other night my daughter got stuck when our old Volvo just stopped while driving down the road. She thought that she may have run out of gas but after adding gas (still wouldn't start). It will start for maybe 5-10 seconds then stop. Within that 5-10 seconds it starts & runs smooth then cuts out. Replaced fuel filter & plugs which needed it. Distributor looks fine & timing is at 12 degrees. It doesn't appear that there are any vaccum leaks (disconnected hoses) & fuel pump seem to be working properly .....Any suggestions where I should go next, would be greatly appreciated. Thanks