1993 Mitsubishi 3000GT Motor will fire on ether but not sta

Engine Mechanical problem
1993 Mitsubishi 3000GT 6 cyl Front Wheel Drive Automatic 100k miles

My motor stopped running after it was started one afternoon.
Shot ether into the plenum and it started for a few seconds. Will not remain running.

I have replace fuel pump and filter.
Both crank and cam sensors.
NEW ECM
NEW MFI
New igniton module.
Please HELP