hi there, 1st time on the forums here and i hope you can help me out. first of all i just got a 2.3 Petrol galaxy and while driving it would decide to Rev it self up to about 2500rpm and slowly work its way back to a good idle speed. this done it ALOT of the time not just every now and then, We had a look around the engine and can noticeably here a air sucking/blowing sound from around the inlet manifold / TB. when i turn the engine off you can here the air suck/Blowing sound for a further 3 or 4 seconds after the engine is off. Now we have had a look around the brake pedal has gone very stiff and brakes are hard to use (they do work, but uncomfortably) I hope you can help me out with my problem, Thanks for taking the time to read this. any Help would be greatly appreciated.