I have a civic 93 with 1.5 replaced the fuel pump it was shorted ,

What is your question?

cranked ran fine, kid went to drive it turns over no start I get home try it starts first try,drive it shut it off starts up perfect 10 15 times kid tries to use it wont start just turns over replaced main relay same thing,I try it starts up fine is it a computer problem sounds like not getting signal from ecm any body have diagram of how circut works