I was warming up my truck this morning when it died. I tried to restart it it ran for a second and died again then it wouldn't start at all. There are no blown fuses and it has fuel in the bowl. There is oil about 2/3 the way up in the HPOP res. I'm not sure how much oil and what type should be in there and do I fill the res. or is that just to see if the pump is working and it to late once it's low type of thing.I tried spraying wd-40 in it and it still wouldn/t start. This is the fourth breakdown in 8 days unbelievable. This is my first diesel and I only know what I've read on this forum. Thanks to everyone by the way this is a great site.