neil-h

Right, I'm wondering if this is the start of a problem with my car or if it's normal. I noticed earlier that if I lift off from full throttle I can hear a noise like a dump valve opening, even though I've got the OE recirc valve. It's not particularly loud so it's possible I've missed it previously but I've had the car a couple of years now so I'm not convinced.

Any thoughts?

joz8968

iTrader: (13)

I have the Forge MY97/98 recirc plumbed into my set-up, and it also makes a (satisfying) rapid #pee'owwn#-type whistle, when coming off the throttle from high boost -- despite the air being directed back into the intake hose i.e. no air escaping to atmos. Obviously.

Do you normally drive with the radio/music on and haven't really noticed it before?

joz8968

iTrader: (13)

Obviously, check the security of all your clips for the turbo hoses... Esp the recirc hose's ones, 'twixt dump valve and intake.

Also check all hoses for splits.

neil-h

This was my initial assumption tbh but I do drive around with it off from time to time.

jaygsi

iTrader: (46)

Check hoses etc i fitted an STI intercooler to mine and after it was making a weird sound, i pulled it all apart and noticed there were 2 gaskets on the Y pipe on one side. Only small thing but air was getting out.

alcazar

iTrader: (2)

I can hear mine, a Forge recirc, but the car has an induction kit and is MAf-less.

joz8968

iTrader: (13)

Yes, I also forgot to mention, mine has a cone air filter too - so that acts as a route (albeit baffled) for some of the sound to escape to. Neil, have you got an open air filter set-up?

Matt_STi

Mine did this for a while, turned out it was the gasket on the rear of the valve was broken, got a new gasket and refitted the recirc valve and it fixed the issue.