Mine does same, haven't had time to check it out.

It's not a whine or woosh, more of a howl on mine, as the reva drop.

It's either a boost leak, or if yours has a DPF maybe starting to clog up and it's putting back pressure on turbo.

 

Mine is a howl to.

I'm pretty sure my car does not have a dpf.

 

it sounds like a boost leak, mine started the same way and after a few days i started to loose power above 2500rpm due to the split getting bigger. check the hoses for splits.

 

No power loss here, pulls as good as ever

Think mine is coming from the rubber hose coupler on the turbo which connects to the intercooler pipe because last time I checked it was quite oily

 

A bit of an update.

I checked all of the hoses, intercooler pipes etc and the vacuum lines. I used the soapy water spray test to see any bubbling. I also physically checked everything and did not see or notice any splits or bubbling so all the pipes seem fine.

One thing I noticed was when I disconnected the electrical connector on the actuator on the turbo and when I revved the car the woooh/whistle sound went away. It was a lot quieter to the point where you could just about hear it. When I reconnected it the woooh/whistle came back again as before.

What does this mean?

 

A bit of an update.

I checked all of the hoses, intercooler pipes etc and the vacuum lines. I used the soapy water spray test to see any bubbling. I also physically checked everything and did not see or notice any splits or bubbling so all the pipes seem fine.

One thing I noticed was when I disconnected the electrical connector on the actuator on the turbo and when I revved the car the woooh/whistle sound went away. It was a lot quieter to the point where you could just about hear it. When I reconnected it the woooh/whistle came back again as before.

What does this mean?

Actuator controls the VNT mechanism which in turn regulates turbine speed.

Check turbo shaft itself next for movement.

 

Thanks will do.

 

Have you checked your exhaust ?. If your exhaust is blowing you would hear the woosh from the turbo. I have a straigt through exhaust on my mondeo tdci and I get that sound cos of no backbox. You should notice it around 2.5k revs the most