ok so my 6.5L all of a sudden wont start. has half tank of diesel, i cracked the t valve and i get diesel coming out as well as i cracked off a few injectors and i get fuel while starting.

it seems to start when return line off injector pump is off, could the problem be a clogged return line/?

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tomorrow im going blow out the return line and see what happens, but im reading that the pmd fails often on these

anyone have any thought on this?

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Ok so i have put clear tubing on the return off the ip after blowing out the return wich when i was doing so i could hear the air in the filler neck slighly

Not air bubbles when i run the truck eith the clear tubing i have also ran the lp eith t open to see if its pumping which it is,

What should i check next iv spent over 3 grand into this since i bought it little over a month ago starting to think i bought a lemon