1989 Sidekick Brakes Booster Check Valve

[charlo]

Hello ...my brakes pedal suddenly became very hard...what could be the problem?...and does the brake booster carry a check valve?  1989 Sidekick 2dr mt...Charlo

[jwunsch]

Hello,

My booster blew a year ago. Did not notice a check valve. I could hear hissing sound in the cabin as vacuum was leaking trough the booster. Also ecu did not like it and idle rose to about 1200 RPM and higher when pressing brakes.

You could pull the vacuum hose off the booster (and plug the hose with wooden peg). Start up and see if the brakes are as hard without the booster. If the brakes require about same mount of force to work with, the booster probably broke.

I did buy new one with bit different part code (it was supposed to fit), but we actually had to hit the wheel well from engine bay side so that there were about 1" dent to make the new one fit.

Pegging it.

https://fixkick.com/forum/attachment.php?aid=961



Whole thread: https://fixkick.com/forum/thread-vitara-...eplacement

^Note1; Check how I have reported my car info, report those. Fixkick mist not be able to help you with only year and doors.
^Note 2 my car is newer and from different country so check internet for part numbers, might be different.

[fixkick]

MY GUESS OR FUZZY MINE, SAYS
CHECK VALVE IS INSIDE,
THE HOSE VACUUM IS DEAD NO VAC, OR BOOSTER IS BAD.
OMG , I DID THE BOOSTER, AND IS EVEN YOURS.

http://fixkick.com/brakes/brakes.html#Boost

THE CHECK VALVE IS PART OF THE ENTRANCE 90% HOSE NIPPLE
BINGO.
MY PAGE TYPED 15 YEARS AGO. STILL; LIVES. (I'D NEVER GUESS IT WOULD)