Complete Newbie at a loss... 97 8.0L won’t start
 

I’m throwing the book at this truck and running out of ideas. Bought the truck 2 months ago, have since done plugs and wires and a fuel pump. Fuel pump was just changed last week. Up until yesterday the truck was running, but at an idle the rpms would fluctuate. Started driving down the road and truck acted like it was falling on its face when I stepped on the gas. Truck stalled out and hasn’t started since.
So far things I’ve checked are:
there is spark at all the plugs
fuel pressure at the fuel rail is 40 in the on position and 50 while trying to start.
used a noid light on the rail and the injectors are getting signal
used an ohm reader and tested the crank and cam sensors. According to what I’ve read they are on a 5amp circuit and should read at about 5 amps dropping to just above zero when starting. Both do just that
ASD relay is good
All fuses seem to be good
Disconnected the battery for 20 min to drain system

I’ve run out of ideas, can use any advice I can get!
Thanks in advance!!!

Are you getting spark? Check two cylinder on each set of coils. (one set does six cylinders, the other set does four.)

Could be from just cranking it, or, could be an injector problem.... If you stomp the gas pedal to the floor, and crank it, do you get any action? Does the engine ever even try to start?

If you have good spark, then it's likely a fuel problem. Verify fuel pressure, and injector pulse. You should be able to rent the tools from your local parts store.

What brand fuel pump did you put in?

Is that just a bad connection on the noid light? Or is the cam sensor failing?