VP44 bad?
 

just got my truck out of the shop for tranny problems. and it was doing great. was running around town starting and turning off the truck and one stop, it hesitated to start. it did start at 5-10 seconds of cranking, but ran very rough, like not all cylinders were firing. moved it 30-40 feet so it was out of the way, thought it would smoothen out, it didnt so i shut it off. and then it wouldnt start. had a problem like this before, cracked injector lines, got fuel to them, and it goes. this time however i couldnt. getting fuel to vp44 from FASS system. and can only seem to get fuel to injector line 4 with 1,3,4 cracked. seems like i get a tiny bit to 3 but 1 is very dry. after trying for a long time, I got it towed to the shop and it can be delt with next week. only codes i have is "over boost pressure exceeded" and "low TPS voltage". truck is otherwise stock with no tuner. is my vp44 shot?

It is possible the VP is failed mechanically. It would set a CEL if there were electrical issues normally. just check the plug on the VP make sure no pins are burned. How many ,miles on your VP running a stock pump? (Before the fass install)

i do not know how many miles on this VP44. truck has 390,000km. origional VP in assuming? what kind of pressure should it be putting out? i heard like 2500psi or so??

I believe its much higher than that here is a thread to look into.
https://www.dieselbombers.com/98-5-0...el-system.html

If you got 390k out of a stock VP that's pretty good. If you get it tested make sure the tester has a certified bosch tester. From what I hear they are $250k and only a handful of people have them.