[ArmyJeff]

ok SO HERE IS THE DEAL: as the title of the tread describes, I hav white smoke, it backfires a little at deceleration, no boost above zero, and when it gets close to zero the rear turbo makes a horid grinding noise.

This is what I did, I put MSD wires on and new plat plugs with a gap of 34. I then changed my rear motor mount with a 3SX poly and put it back together to get all what was described above. During the install of the motor mount, I removed the rear downpipe/precat, and the exhaust, as well the actuator to gain room to get to the motormount. Replaced it all the same way and put it back together. Drove the car and could not get any boost and then the grinding started. I took it apart and re-did it and no change???? Otherwise i had the intake pipes off to gain some space and then put it all back together. Motor runs fine. I get no knock according to my HHH dataloger and all sensors seem to read normal??? Any advice? Blown rear turbo seals??? HELP PLEASE!!!!