bad injector?

[99stackedpowerstroke]

so the symptoms of my truck are, it dont like to start, put a comp on it and it shows only 108 psi at the heads, i put a hydraulic gauge on hpop line goin to the passenger side head, and while cranking it shows 400 to 700 psi, and if it does start it runs amazing but i noticed at idle it smokes more than usual and it kinda looks like white smoke but not enough to really tell, oh ya i also removed a plug from the head and put my gauge on the port and it didnt even move while cranking with the hpop hooked up to both heads, gauge reads 0 to five thousand psi

[dazdillenger]

sounds like an injector o-riing. Is the fuel in the fuel bowl black like it has oil in it? Even if it doesn't, I'd do o-rings.

[99stackedpowerstroke]

nope fuel bowl is clean,

[ToMang07]

My advice is find a good scanner and run a buzz test/check for codes

Sounds more like a Glow Plug/relay problem because you say it has a hard time starting and runs well once started.

Does plugging it in help with the start issue?

[99stackedpowerstroke]

buzz test good, and no codes, but the pump pushes 400 to 700 psi within 4 seconds or so and it takes the heads bout 10 or longer to build pressure, i put a hydraulic gauge on the heads and read it manually not on the comp,