i just put alot of new parts on my 7.3 head gaskets ip injectors mechanical pump.
she is timed at dead zero the only thing i havnt had chanse to fix yet is the hose from vally pan to intake will that being open stop it from starting

 

These engines don't need much to run:
All you need is fuel, and enough heat to get combustion.
In your case, have you bled the injector lines? might help.
Once you're getting fuel there, tighten things down, let your glow plugs work(or give it a tiny bit of ether if you don't have GPs setup/connected), and it should start.

 

could it be a bad filter or even bad fuel causing it not to go all the way

 

i have fired these engines up and run them on 12 year old fuel with no problems.

 

Yup!

I did that once myself; there was a few gallons left in a tank of a truck that we took apart; it had been sitting for several years at least.
Poured it into a bucket; it looked clean(No water) so I threw it in my current rig and just ran it. Ran great.

 

yes i bled lines but not getting mind bogling pressure like thaught would get cosidering injectors are saposed to pop at 2000 psi

 

You won't get the pressure without /resistance/ to the pressure.
All our pumps are is just a couple of plungers squeezing together. Without anything to block the pressure, it's just like squeezing a hand sprayer without the spray nozzle - you get a little squirt, but not a spray.
Once you tighten the lines back down, the pressure will build up in the line against the injector and /then/ you will see the high injection pressures.

 

^^^^ Hand sprayer analogy is VERY helpful in visualizing how high-pressure mechanical diesel injection works. Tried to rep you, but got the message.

 

^^^thought about tryin' to explain it. Glad Mac helped out; he did a much better job than I would've.

 

I got 'em taking care of.

 

Are you getting any smoke?

 

My Dads 2007 sierra was doing the same you can hear it crank but it wont start. The truck fuel filter went out and it was also the part that primes the fuel filter with a pump as soon as we replaced it it was up and running. I know its a different type of truck but maybe this might help. So check that fuel filter and the lines to make sure you are getting pressure. The part was around $170.