Have been having recurring Service Engine Soon Light with 17, 18, and 35 codes stored. Have also been having stalls and hesitation. I have been going through the checklist in the “Turbo Tips” article from the members’ section. Have installed new batteries to bring voltage backup as well as a new alternator and belt. Have installed a clear hose on the front of the injection pump to check for bubbles. Then I measured the fuel pressure at the fuel filter drain line with the fuel filter drain value open. Both cranking and engine running I had NO pressure. I put a new lift pump in and wired up a bypass switch (per article in TDP) also put in a new fuel filter. Ran pump and opened value on top of filter to bleed air. Unfortunately had not tightened filter enough and leaked diesel so tighten down enough no leaks. Was not able to get fuel to go through hose on top of filter to bleed into a container as I have done in the past. The funny thing is when I use the bypass switch I get a reading around 3 p.s.i. with the engine off (I can now clearly hear the pump running) , if I bump, switch pump on and off I can get the readings up to 5 p.s.i. with the engine off. If I start the engine I get the Service Engine Soon Light on 17, 18, and 35 codes stored and a NO pressure reading again. I have tested the voltage going to the pump with the engine on and am reading 14.0 volts. Have read in articles that system may be “Air Locked” but I don’t see any bubbles in clear hose on the front of the injection pump. Articles talk about cracking #1 injector. I have looked on drivers side very front, can see line from injection pump running to cylinder with compression nut on line (similar to fuel line at lift pump) is this the nut I would loose to bleed air out? Is the system air locked or is it something else?
Thanks for the Help. Brent