Hi
there's a small black plastic component on the top of my engine above the turbo, it looks like some kind of pump as it has two small diameter rubber pipes onto it, one on a fitting marked "out" and one on "vac", I presume it's a vacuum pump for something, there's quite a few small diameter pipes leading about the engine, the reason I'm asking is that recently I have noticed it running when I come to a stop with the engine running, I've only recently noticed it so I'm worried something is happening that shouldn't be.
could anyone please enlighten me?
thanks in anticipation nottonto