ok well its been acting a little weird latley and 2 week ago at the pulls it did some funny stuff comnig on and off boost and acting all around weird kind just put it to the back of my mind. well this weekend I had to go to Central amreica AKA El centro CA arm pit of the world LOL . anyways towing my equpiment about 10,000 lbs up hill the trubo was barking really bad to the point tht the truck would almost shut off. got out of the trottle back in it and it would do it again seems at around 18psi it starts so i would have to down shift to 3rd and creep up the hills. so it wouldent bark. It did regardless of my water meth beeing on or off never had this problem with my stock turbo.SO any ways just wanted to see if any one has any insight to wht may be going on Thanks