Okay first off not truly a car guys but my nephew needs help so here we are. Problem, gonna be many, she just don't turn over. What we have done battery, radiator flush replaced hoses, changed and gap spark plugs checked with tester for spark distribution, removed and cleaned air filter compartment replaced air filter, changed fuel filter, checked continuity in inerta switch, was able to get under and hear the fuel pump when the key is turned but not cranked. Where should we go next we where thinking doing fuel pressure check at fuel rail. Also tried a little starting fluid in air filter canister just to see and she ran for a quick min till it was evaporated... any help would be much appreciated

If it ran with starter fluid than you have a fuel issue. Need to know what year and engine size.

1987 2.9l 4x4.....Range of course Thanks you for at least writing