2.0 idles great, when you run air for a period, shut it off, it won’t start without starting fluid. It also will just die on you while driving. Computer is the last thing to change?
Yes, computer is last thing to change. Changing ANY part is not the first thing to do, either. Codes, year, any other details of symptoms, attempted remedies, routine maintenance performed (filters, etc.)?
The computer is about the last thing to change on a Ford. GM in an old 1985 car; maybe nearer to the top of the list. There are other things to check like the codes as mentioned above.