Yepper, if your pourin alot of black smoke, no power or boost, turbo feels free, no play in it, and even a minor (not much) leak you should get somthing! I can only speculate but the vac/kill test outta show if it had a severe leak? A 4-stroke diesel has a tremendous amount of intake suction force, someone on here mentioned that big Cat diesels can suck the head gasket in if the intake gets shut off! If it were leakin bad i would bet you could hear it and it should take longer to possibly die. Also, i happened to blow the wastegate line on my benz apart once and i never heared it blow but once open there was a very noticeable loud air whooshing sound under spool. It was a good size leak and i still made full boost (granted the wastegate wasnt opening:spit
If you powerbrake the truck sitting there you should certainly have boost And hear it spooling up! If its just smokin like hell and no turbo whine (and the turbo is free).......
Sticking to my original guess, Wastegate flap valve is broke/gone
If Dan mentioned thinks so too, maybe hes seen this before? All the internal flap gated turbos ive seen...the flap is attached to the arm with basicly, a badass rivet. With the extreme enviroment its in, i could see it fatiguing and breaking off.
:thumb:
