Hard to start

[jhess]

could a going bad hpop cause the truck hard to start? The only thing that I can think of that is differant, is that I put 10-40 oil in after I put new injector cups in. I have about 500 to 600 mile on since, So I'm sure that all the air is out of the system. Just to think last Nov. I knew nothing about a diesel, now I'm work on it. That is, with talking with a ford tech. He's been helpful.
Thanks for any input.