03 Rav4 D4D Turbo Whistle

[JZA80]

I have a bit of an issue that I'd appreciate some help with.

I have an '03 Rav4 D4D (80K miles) that has developed a whistle when accelerating, I can still feel the turbo coming online but there is a drop in power and it is bogging down under wide open throttle. It's definitely turbo related but can't find any obvious leaks after a visual inspection of the pipe work and there are no warning lights coming on.

Before I start stripping the IC and pipework off to inspect the turbo, I was wondering if anyone had any ideas what the problem could be? I've read that it may be caused by a sticking EGR valve but that this normally brings up the engine warning light, which I'm not getting.

[avensisd4d786]

does the noise stop when let go of the accelerator...if yes, Sounds like what I am getting. any chance of a video?

[JZA80]

The whistle can be heard whilst accelerating as the turbo spools up, off boost the sound goes. I know there's a boost leak somewhere, I suspect it's either the egr valve or there is some damage to the turbo, just thought I'd ask for opinions before stripping it to inspect the turbo.

[avensisd4d786]

did you get to the bottom of this?

[JZA80]

No not yet, haven't had the time yet to investigate further.