legacycentral bbs

Whenever I let go of gas, I can hear a high pitch whiney noise.

It seems to be coming from the drive side of the engine, near the back.

I looked at all the hoses, seems to be clamped properly and no physical damage.

Any ideas?

...turbo car?

Is it your blowoff valve maybe? That's located about in that area... the stock valve recirculates excess air back into the turbo's intake, that may be what you're hearing. Although I don't really remember the stock valve making much noise...

No, is a NA car.

It sounds like it happens only above certain RPM's at a higher range.