boost issue

[2.5bluenob]

Hi All, my car has a small problem at the mo. im only able to unleash 500 horses as high boost isnt working too well.
low boost seems ok i think its hitting about .8 bar of boost but high boost isnt as it should be. If im already on full boost on the low setting and i hit the high boost button the boost seems to only increase slightly and steadily. im sure before it used to go to 1.2 bar on high boost and the needle used to fly round to 1.2 now it just creeps up.
Does anyone know what the problem could be?
Cheers
Steve

[2.5bluenob]

ok cheers guys i will take a look. are there any tricks for finding such a leak?

[2.5bluenob]

ok thanks Rob.

[2.5bluenob]

This fault turned out to be a faulty alternator and st wiring to the plug. after changing the car was back to full power.
Cheers Steve