im getting good fuel to the pump.. fixed the air leaks.. as i turn the key it want to go it seems then it just quits. same think 6 times in a row
Still sounds like air to me. Or, too cold, or fuel delivery too low? How cold is it when this is happening? Assuming the temp is over 30F, this is what I'd do.
First thing I'd get a small fuel tank, lay it on the fender or roof, and hook it gravity-feed to the inlet of the filter housing. That will eliminate any possible air intrusion. Then bleed the filter and try it. I've driven a few 6.2s home that way that would not run otherwise. The injection pump cannot work until it is 100% air free.
I've got a rusty diesel 4WD Suburban I bought from a local school. for $250 It would start and die, start and die. Ends up there's a pin-hole somewhere in back, making it suck air. I finally stuck a 5 gallon outboard motor tank in the back seat. Ran a rubber hose all the way to the fuel filter, and then drove it home that way. Runs fine when hooked to that little tank. Note - if you do that, make sure you open the vent on the cap. I forgot at first, and the tank actually started to cave in on itself from the suction from the engine fuel pump.
If still not working, I'd pull the top cover off the pump, look in and verify the linkage is all free and metering valve is not stuck. The metering valve does all the throttle and shut-off work. When turned one way, it shuts the engine off, and then turned all the way the other direction, youi get full throttle.
Not counting all the other controls inside the pump, there isn't much when it comes to just starting the engine. Fuel comes into it, gets controlled by that metering valve I mentioned, then gets sent to two little piston pumps, and then on to the distributor that determines which cylinder gets that little charge of fuel. In most cases, either it works, or it does not - with not much in-between. Note though that if someone messed with the max fuel adjustment, and it is set too low, the engine won't get enough fuel to start when cold.
If that pump sat for many years and got dry, many parts inside could be stuck. Pump pistons, delivery valve, or metering valve.