boost problem

[sophie23_98]

hi just a quick question i have just started with a boost problem it is loosing air pressure when reaching about 6.5 on the boost and the 2nd turbo doesnt seem to be kicking in.
i have check all the hoses today had all off and changed all the jubilee clips they all seem ok, as anyone any sugestions please i want to get it right for rotostock.

[clive]

Hiya,
Check your  little vacuum hose\'s, i.e. if one has pulled off or is split, particularly have a look at the small triangular plastic box [ middle of engine under throttle cable ] where there are three pipes, one directly controls the second turbo.
BTW if you are not making enough boost on the first turbo, the second won\'t come in.

 Somewhere out on the site l have put boost and vacuum diagrams that show all these pipes and their functions.

[sophie23_98]

thank you clive i will go and look now i printed off the diagram but i didnt mention that i here a air leak from somewhere just cant find were it comes from.
thats probably why my 2nd turbo isnt coming in bcause of it

[clive]

Favorite one is the Boost pipe that connects straight on to the inlet [drivers side] if you can hear air.

[sophie23_98]

we checked all the pipes only one of them seemed to be a little mishaped a bit not loads though u here the noise like its a dump valve on the car when u rev the car high revs