1988 f350 7,3 diesel on 1990 Ford F-350

If I don't start the truck daily oritsits formore than 10 hrs it won't start. runs smooth as silk when it warms up. no missing is there a check valve that allows air into the fuel lines because it sounds like it is not getting fuel, once it starts it perfectly fine, only does this when it sits.

Asked by for the 1990 Ford F-350
Glow plugs or circuit problem. Do you know what a glow plug is? What is your skill level say with a DVOM?
(Multi meter)
1 more answer , 1 more comment
go to school
And have green jelly at lunch time.