Lately I have noticed a serious lack of power in my car and a funny noise coming from the turbo side of the engine bay. I am able to boost to 9psi which where my MBC is set at but it is not reaching full boost until later in the power band. When I let off of the gas I hear a distinct "whooooo" noise almost like what an owl would sound like.

The noise does not sound like the tial bov and only is audible after boosting any psi. The more I boost the louder and longer the noise is. Any ideas? I am thinking the turbo might be going so my next questions is how long does Garret warranty their turbos for?

 

check your couplers

 

sounds like compressor surge.

 

Sounds like an owl has parked his *** under your hood..............sorry i just had to.

 

+1 on checking the coupler, had one slide off about two months ago, made a similar sound and noticed the coupler had slid off a bit. Slid back into place and retightened the clamp and voulah, back in business. Check all possible air leaks first before rebuilding or buying a new turbo.

 

Check for shaft play.

 

Check over the car, as others have mentioned. Couple be something very simple like a small leak, or a tear in a coupler.

If it really is a bad turbo, it will eventually fail all together, so just hang tight for now.

As far as the warranty is concerned, I know from experience, that Garrett warranties their turbo, up until the moment you start the engine.

 

im going to check out the car this weekend for leaks and possible shaft play will update..thanks for the advice guys