2003 Leon Cupra Turbo.

[boobles]

Hi, I have recently purchased my first ever petrol turbo powered car & loving it. However, on a couple of occasions whilst driving at low speeds & not accelerating or slowing down the dump valve is releasing the pressure. To be more specific, i was driving at 20mph in second gear for about 10 seconds, didn't accelerate or let off & suddenly the pressure is being released from the turbo & wanted to know if this was normal? I can just about hear it with no music playing & window open. The car itself drives fine & goes pretty well with no signs of any smoke from the exhaust but i don't understand why the pressure would be released when under no load or not even slowing down.

[Robatr0n]

Are you sure you didn't accelerate slightly? At certain revs you will ever so slightly hear the car coming on boost. I don't mean to sound patronising by the way!

Aside from that, you would notice a big boost leak so it's quite possible that the dump valve / divertor valve is on it's way out.

[MonkeyHanger]

If it's still got the bog-standard (plastic) DV, swap it for a decent one. If the standard one hasn't failed, it probably will soon enough because they're rubbish.

[boobles]

Cheers guy's. I am pretty sure that it's already fitted with an aftermarket DV because although it's not noisy, i don't think it is standard.