So this last weekend I started the tear down on my 1996 K2500 Sub 7.4L lower intake. I got it tore down and reassembled with new gaskets, distributer, and fuel rail. Got it to fire right up and run just fine untill I took it out for the test drive. Now on this engine you need to have a tech2 to set the timming just right. When I got back to the house I shut it down and went inside to get ready to go out for dinner. Came out 1hr later and the engine would crank but not start. I checked everything and found that my fuel pressure was at 40psi. I changed out the fuel pump last year so that should be good. Now if i spray a shot of starting fluid in there it fires right up and will drive but with out the starting fluid it just wont start. What am I missing any HELP would be great.