Kayteg1 wrote:
90 percent of problems with diesel starting is air in the fuel lines.
Since most of diesel fuel lines operate on vacuum - a leak will not show fuel outside, but air inside. Most of diesels do have glass, or clear plastic lines so you can observe.
Diesels do have cold running mechanism, what is equivalent of choke on carburated engine, on computer program on gasoline injection. In different years/models it is different technology, but cold diesel need to increase rpm to run.
I guess that is why diesels have glow plugs and high pressure fuel pumps, so they can have vacuum fuel lines.