Gaskets changed now it seems no fuel to injectors

[Town&Country808]

I got a 91 explorer with the 4.0 pushrod and anyway, I had trouble turning my motor over when cold so long story short I changed my gaskets in the upper and lower intake the head gasket also.now my truck turns over when cold then dies in seconds like no fuel to injectors.
I swapped the computer, my fuel filter is also farely new. Just bought the truck a few weeks ago any clues?

 

[Town&Country808]

I'm getting codes but my scanner isn't even showing that it's connected to the computer... I'm now under the impression my fuel pressure regulator has gone faulty in the process of maintenance

 

[2stroke]

Swap the A/C and fuel pump relays, and while in there, check the fuel pump fuse. If no go, make sure your inertia cutoff switch isn't tripped. Let me know if that doesn't get you going.

 

[Town&Country808]

Swap the A/C and fuel pump relays, and while in there, check the fuel pump fuse. If no go, make sure your inertia cutoff switch isn't tripped. Let me know if that doesn't get you going.

If I never touched any of the relays to start with does that make sense? I give it a look regardless I appreciate the help