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vacuum leak ?

1K views 2 replies 3 participants last post by  Tote 
#1 ·
This has most likely been answered before, just couldn't find a post directly relating to it...

when i'm at a stand still and on the brakes the idle goes up a little. off the brakes and it drops.

Is this normal?
 
#3 ·
Get someone to put their foot on the brakes while you check and see if the booster is leaking vacuum. Idle will change if you continually pump the brakes but should drop back to normal if you just put your foot on them. I have had a remote booster diaphragm tear and only leak when it was activated. ie stretched by the piston depressing.
Regards,
Tote
 
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