01 Lb7 crank no start

[Robertlawson6.6]

Got a 01 durmax in the shop for a crank no start, its got a new filter head, new cp3, new injectors within the last 10k miles and a new frp sensor, we have bled the system and nothing, the frp is desiring 42-45 mpa and the actual is stuck at 2 unless you unplug it which makes it around 180mpa, we’ve tried a known good ficm and that didnt fix it, ecm/ficm fuse is good, we tried the return test out of the main return line and it only had 50 milliliters which check it seeing as each bank say 12 mil each with cp3 using 20 roughly and the truck wont start at all, possibly ecm? It will run off old cosby juice but thats it, any info or thoughts?

 

[Chevy1925]

How many dmaxes have you worked on?

I pray the glow plugs were disconnected when you threw ether down it

Its hitting 180mpa with fpr disconnected and cranking?

Whats the cam and crank signal doing on scan data?

How did this issue come about that brought it to the shop? (Customer description and what theyve done)

Codes?

You got a scope? Probably going to need it

 

[TheBac]

Moved to LB7 section.

 

[2004LB7]

Welcome

Got to fix that 2 mpa issue first. Even with a bad FICM, crank and cam sensors, it should still build pressure. I'm going to assume you unplugged the pressure sensor to get it to show 180 mpa. If so, that doesn't really tell you much

How are you priming the filter? Explain your process please