Does the truck drive? If it does take it for a test drive with a mechanic and they will see everything on a screen.

 

It has a new TPS, pcv valve and seafoam in the tank. I cleaned the IAC. its got me licked....It has 50PSI at the rail on first key turn over, then immediately drops to 3-5psi in about 10secs. I think its a leaky injector. P0303, p0305, p0300....