I have a MY99 UK Impreza Turbo and am just wondering what vacuum readings I should be getting. Reason is my brakes are really poor and I'm trying to find out why. Tried bleeding them, and swapping discs and pads, but they are still really bad. All pads seem to wear evenly and calipers appear to work fine. My boost gauge shows about -10 psi with throttle closed. Is this about right or should there be more, I have'nt noticed any leaks when on boost. Regards, Shane.

 

have ur pistons seized? on the calipers.

 

No, calipers appear to be working fine.

 

servo? only thing left if you checked everything surly?

 

hiya, jus to let u know i have a 99 turbo and my boost gauge also shows -10 when car is just ticking over, also dont mean to hi-jack the thread but i have a manual boost ajuster in the engine bay and was wondering how far it should be open or closed or is this just to personal preferance,

 

My 2001 wrx is showing -19 in-Hg at hot idle. Am sure subaru say it should be at least 17.5 ie, more than 17.5 then.

 

-9.6 psi is normal