Brand new head jug piston and rings New fuel pump, plugs, injectors, and all throttle body sensor harness fixed. Put a new oil pressure relief valve in. Battery is new and reading over 12.8 volts. No check engine light but machine still cranks over and won't fire. Small shot of ether fires right up and then dies. Can check compression or leak down due to fresh rebuild nothing is seated. Any help greatly appreciated. Leaning towards oil pressure the most being either to high due to nightmare getting old relief valve out.