Got a busted hose, going from fuel pump to the air inlet; what does it to?

[$hitblast]

Cracked where it fits to the air inlet. There seems to be some oily stuff coming out of it. Car operates normally.

Edit: Sorry bout typo: "What does it do?" was the question.

[gldgti]

It supplies boots pressure to the injector pump which adjusts the fuelling as boost increases.

If its broken, you will have a small boost leak and no increase in fuelling when you get on boost (less power).

The AAZ pump has a 'boost pin' which is very mild so you probably wouldn't notice a huge difference.

A great modification is to take out the AAZ pin and put a 1.6TD pin in there instead. An easy 10hp.