CM2350 fuel rail issue

[Rawze]

(09-20-2023 )ktblogistics Wrote:  so have some codes for injector solenoid driver and turbo
for turbo inspected and replaced crankcase filter for maintenance free
(looked like clogged to full capacity)
replaced intake manifold pressure sensor
replaced exhaust back pressure sensor and check tube for clogging
both sensors were painted red so might be original with 750k miles

did fuel leak test and pressure dropped to 100psi within 16sec
so from 30k to 100 ,tried it few week before also
it drops like a extremly fast

did fuel amount test and had 100ml for 1min at 30k psi
used cummins tool at return line from block

what else i can do to find a solution or do i do something wrong
truck is demandated
thanks for your help

FIRST.. if your truck is de-mandated, then you should have had a maintenence free crank case filter in it, or it should have been drilled out, etc..

Is that filter in the photo what it looked like, cut up like that when it cam out? ... or did you cut it up like that after realizing it was completely clogged?. - A dirty and clogged up crank case filter will cause turbocharger damage, bleeding turbo, etc... AND cause the the overhead cam(s) in the engine to flake out, because the cam(s) will get starved of oil.

==========

Your description of the injector test should be done exactly like this, I can only assume you did it like that video shows with the numbers you posted ...

http://rawze.com/forums/showthread.php?t...3#pid75483

... and if it fails then you need to fix whatever is wrong with the fuel system.

Maybe bad relief valve, maybe quell tube not seated or torqued properly, maybe bad and leaking injector, etc.