1996 Chevy 2500 430000 on Motor Cranking over not to bad getting White smoke from Tail'Cracked injector lines on 5 cyclinders and every now and then you get some burping up of fuel not much ,Checked Solinoid working fine fuel coming when Cranked at Solinoid area Checked Psi at "t" Valve getting 4.5 Psi Tried 3 Different Pmd"s Getting some smoke from Turbo area Hope i gave you some Idea of whats going on and i could have Described it better if i Understood it More Sorry hope some can go with that, and every now and then it almost sounds like it wants to go but then No I also check the Shut off Solinoid and was working fine .

Are the glow plugs working? Possible timing issue, compression issue??? Need more info

Probably the Lift Pump or PMD.

My best suggestion is to DO the diagnostic checklist on the sticky.

not lift pump if you are getting 4.5 psi at "T" valve

Thanks for the Reply's but i must rephrase my Question Truck was sitting for 8 months they said it wasn't getting Fuel so i kept bleeding the system finally i was able to bleed all lines and still no fire did a Compression check and found that Number 5 cylinder only had 50 Psi So i removed the head today hoping to see something only to find everything in tact did a Valve check on both intake and exhaust and found they were seated alls i did was just put water in and no leaks that could be a wrong way hopefully not Checked head gasket but not really sure it looks good all Cylinders walls look good not scratches or scours in 1-7 Valves were moving when cranking Now the big Question where to go to from here Help Please Thanks

Low compression on 1 cylinder shouldn't keep it from starting and would not have anything to do with getting any fuel. Sounds like there is a problem in the IP. Sorry to here about the low compression. I would take the head to a machine shop and have it checked for cracks and check for flatness.:damnit1: