I went to the junk yard yesterday and got a computer out of a 93 mustang 2.3 auto. Same numbers and all. Put it in. I found out the starter went bad so I bought another one. It will try to crank over but still no start. I now have no fuel at the rails so I am going to attempt to put in the 5.0 fuel pump. If it don't work can I put an aftermarket pump on with it? I seen one at advance auto for $40. How do I hook it up? Can I put it on with a non working pump or do both pumps need to work?