I would firstly try spraying some easy start product into the intake manifold to see if if it will run.
Assuming this works then you probably have an air leak in the fuel system. One way of checking is to add a length of clear tubing at the fuel filter output to see if there are any bubbles in the fuel
Assuming this works then you probably have an air leak in the fuel system. One way of checking is to add a length of clear tubing at the fuel filter output to see if there are any bubbles in the fuel