Cummins problems HELP!!!

[Lonestar10]

i know on 871 which should have same fuel system i couldnt get a truck i was looking at to start the lift pump took like 9 cycles to fill the secondary filter was barely pissing when we replaced. when it finaly got into a shop it wouldnt start because a checkvalve in that area was bad either not letting fuel from lift pump get to the 2nd filter or the fuel was being returned to tanks immediately. i know theres a check valve in there just not sure the exact failure method of it.


this could also be something to check we couldnt even get that truck to run giving it a puff of ether it would just spin over faster then keep cranking another factor was a completely plugged DOC/DPF