[Ronin114]

My truck has recently been acting up (or so I think). My turbo seems to be higher pitched than normal at cruising speed (30-35). Also, along with the normal v8 rumble there seems to be a moan or groan when taking off from a dead stop. I have noticed a streak of black on the inside of my exhaust pipe as well; I do not know what the substance is... As far as I know, no coolant is puking or leaking... Any thoughts would be appreciated.

 

[dannyboy950]

You may have a cracked exhaust pipe or loose clamp causeing a leak or a turbo oil seal may be leaking. Any smoke? Other symptoms?

 

[Ronin114]

A tiny bit of light smoke on startup; clears in about 10 seconds. Also noticing some vibration/grinding noise when letting off the gas but it may be unrelated.