LML Injector Return lines keep failing. - Chevy and GMC Duramax Diesel . . . However, I am concerned that I may have some blockage or a bad return pressure regulator or maybe something related to the CP3 conversion The return line regulator is part of the harness i ordered, but I would like to do some testing to rule out or isolate the cause
Lml no start after regulator removal - DuramaxDiesels. com The truck thinks the problem is the circuit for the #2 regulator What check on the circuit was done? If you're satisfied with that, there must be another problem yet to be discovered The attachment is specifically for my 2008 LMM, but the problem is similar for the LML also
6. 6L Duramax LML Fuel Return Testing - Diagnostic Network It seems to me that it should be a valid and safe test to block the return line from the pump (steel pipe), and run the injector return (rubber hose) into a container, then attempt to start the engine
Duramax LLY Injector Return Line Issues Fix - Ron the Parts Guy While repairing just the leaking section might seem economical, it’s often a temporary fix The LLY injector return lines are known to degrade over time, and if one section has failed, others may not be far behind
LML LGH Duramax Injector Return Line Assembly (2011-2016) If the pressure is low and there are no leaks in the fuel return hose assembly, the most likely cause is the return line pressure regulator which is part of the return hose assembly
LML 105K miles NO Start - Chevy and GMC Duramax Diesel Forum Install the CH-50375 Fuel Injector Return Line Adaptor and gauge on an injector return line Crank or start the engine and verify that the fuel pressure is greater than 4 bar (58 psi)
New lml engine build, no fuel rail pressure - duramaxdiesels. com I had thought about pinching off the main return line going back to the tank and that would cover both the injector and rail return Just wasn’t sure if it would cause any issues blocking it off so I didn’t try it