PROBLEM.. please confirm my fears

[SATAN]

when my buddies ko3 turbo went out on his audi every time it hit the housing it made what was very similar to a fast buzzing sound and the car lost a shit load of power when it happend every time it spooled.

you may have a rod bearing that is going out. that sounds like a rattle. but it doesnt really sound like it comes from anywhere. then when it does go out eventually it sounds like knocking. but that wouldnt make it pick up truck slow

[MrwassmanNA2T]

If it is pick up slow, maybe the turbo is frozen

[Jason84NA2T]

Did you do a compression ceck or anything else yet?

[OK85ZX]

If it's a rattle noise at high rpms it isn't going to be your turbo.. they spin at 100k+ rpm's, it's going to be a constant sound if it's the turbo going out... it's probably something loose.

[CanadianZ]

pull off the intake pipe. then reach inside the turbo and check shaft play. up and down and forward/back. if it has much play it is shot. also the turbine wheel could have broken off. no easy way to check it though.