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Brake Booster Question


ford4wd08

Well-Known Member
Joined
Nov 12, 2018
Messages
1,259
City
Alcoa, TN
Engine
2.8 V6
Transmission
Automatic
Should a brake booster hiss at any point during applying the brakes? (Loosing vacuum I assume?)

I've never experienced it before this during using the brakes.

Could my booster have a leak?
 
Is it a steady hiss? Or a whoosh only til the pedal gets firm?

If it's steady... most likely a booster.

A whoosh.... just displacing air from the bellows.
 
Is it a steady hiss? Or a whoosh only til the pedal gets firm?

If it's steady... most likely a booster.

A whoosh.... just displacing air from the bellows.

Let me check and I'll let you know.

I think it's only when I apply the brakes...
 
Lets make sure we understand each other...

during the act of pushing the pedal down... a little whoosh sound is probably ok. But when then pedal stops and brakes are applied... it should be silent... no hiss.
 
I believe it is a woosh, I had just never heard it before.

Thanks for the feedback!
 
If a vehicle makes a new noise it's usually a sign of something going wrong.
 
If a vehicle makes a new noise it's usually a sign of something going wrong.

I agree with that.

Guess my comment is from driving my 2016 f150 daily to the 85 bronco 2. The f150 doesn't whoosh. Lol
 
Next time you park the F150... after you shut it off... push the brake pedal. You will hear it whoosh
 
Time for a new booster.
 

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