Will not start acts like there is no fuel. It has a new injector pump. Would start a first using ether and will fire now using ether. Will injectors or glow plug cause it to act like this?
Test your glow plug connections for loose wires and ohm the plugs to make sure they are working. You can test voltage to the plugs to see if you are getting correct voltage.
New fuel pump as in rebuilt or new as in aftermarket? Today's fuel is dry. You need an additive for lube in those older tractor fuel pumps An ounce of engine oil to the gallon of fuel helps.