S40: 1998 T4 Turbo "wooshing" under Boost

[Haizum74]

Originally Posted by gmain1967

Unlikely - if it's loose, it tends to come off full stop, when you hit full boost. That's why I have Mikalor clamps rather than the std jubilee clips. And if it does come off, you get no boost and the DSA goes la la...

If it is a leak as in a hose with a hole or cut though, you may find that it runs OK until temperture rises and then with expansion and higher boost, it causes the problem.

What do you mean by the DSA going la la?

[gmain1967]

Originally Posted by Haizum74

What do you mean by the DSA going la la?

The traction control light suddenly comes on and it may, or my not cut in. Mine did on sliproad off M61 last winter, when pipe blew off connecting hose...

[Haizum74]

Hmm interesting as mine comes on every so often and am getting what sounds like a faint 'hoover' noise when I accelerate. It could be what the OP is experiencing too. So, on that, what would need checking?

Oh and that comes over the whoosh from the cone filter and seems to be coming from the drivers side.

[gmain1967]

Originally Posted by Haizum74

Hmm interesting as mine comes on every so often and am getting what sounds like a faint 'hoover' noise when I accelerate. It could be what the OP is experiencing too. So, on that, what would need checking?

Oh and that comes over the whoosh from the cone filter and seems to be coming from the drivers side.

Mine was down to larger diameter intercooler piping not having lipped/rolled ends. Jubilee clips could not hold tight enough to prevent connecting hoses blowing off when full boost came on. It was the connection from bottom of IC to turbo that was problem (and a bitch to get to....)!