Hi Lads. Had a look around the forum there and maybe this is in there somewhere but ive missed it. My brake pedal in my forester sg9 STI is very hard. Any ideas on the issue? Brakes seem bad enough due to it.
Also any Sligo lads on here that can work on a subaru?
Cheers.
Had similar problems before with brakes and servo. So a test for servo is let car run and see do you get one assisted press and if peddle gets hard and comes back up to you seal in servo could be gone if like what ken says pull v-pipe off and with car on idle should hear and feel it sucking air if it's doing that vacuum pump ok also when pipe off check it's dry inside small cotton bud no fluid. And always follow pipes from A to B make sure all pipes are in good shape hope this helps a bit it's a pain trouble shooting
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I had problem on type r before where the brake proportioning valve mounted in front of the master cylinder was sticking. If i gave it a tap of a hammer brakes would improve until sticking again , eventually replaced. That was on non abs sti. Would not be familiar with setup on Forrester. Most modern abs equipped cars do away with bias valves but I do see some breed of a valve on the modern Subaru's in same location though different to mine. Like the one in this photo.
You can test vacuum servo assistance by pumping the brake pedal a few times with engine off to empty servo ( or refill with air if you want to be specific). Press pedal hard then start car, if pedal moves away from you half an inch or there abouts servo action is fine.
If no servo assistance measure vacuum with vacuum gauge it should pull 20+ inches of mercury. If vacuum is good use hand vacuum pump to pull a vacuum in the servo it should hold the vacuum if not diaphragm in servo is shot.
Good man fair play for updating it when pads get old they get hard and useless so might not even be a racing pad . Had this on a set of brembo calipers and 10 year old sti brake pads there was just no bit from them new pads and there were sorted
is that your white sti forester 2004