have recently upgraded the turbo on my 4.2
it ran great for about 3 days and seems to have lost boost have taken back and they are sure there is no leaks or blockages
there is a crazy induction noise which is more like an unpleasant screeching than the nice spooling sound its seem to hold from about 14 psi till 20 psi I am yet to get a bigger intercooler and diesel pump its seems to boost hard and fast early in the morning when she is cold (motor and out side temperature ) and lag when is warm (motor and temperature) does this mean intercooler is not doing its job and could I be damaging new turbo.
also seems to be blowing more black smoke than before although I also got a 3 inch exhaust which is now directed out to the left side where as before it was straight out the back maybe I just couldn't notice as much before