Fernandes

Hi

When I come off the power at about 3-4000 revs - it makes a sort of whining noise briefly.
It's an STi

Any ideas?
Fern

MorayMackenzie

You may be hearing the standard recirculating dump valve, which would make a slight whooshing noise as the pressurised air bypasses the throttle body abd is returned to the inlet system.

coolhand

U'll surely hear the noise unless yr turbo's jammed or something. It's a normal case as the turbo is still spinning n is slowing down.

Fernandes

Thanks for that, I forgot to mention that it has a dump valve on it, and yes that makes a whooosh sound, but there is a whine - a mwhaa kind of sound - that is present when lifting off the accelerator - but not at low speeds... Just seems a bit odd - sounds a bit odd as well?
Fern