Brake Booster Question

[ford4wd08]

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?

 

[Uncle Gump]

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.

 

[ford4wd08]

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...

 

[Uncle Gump]

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.

 

[ford4wd08]

Understood. I'll confirm when I drive it tomorrow.

 

[ford4wd08]

I believe it is a woosh, I had just never heard it before.

Thanks for the feedback!

 

[Uncle Gump]

Welcome...

 

[19Walt93]

If a vehicle makes a new noise it's usually a sign of something going wrong.

 

[ford4wd08]

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

 

[Uncle Gump]

Next time you park the F150... after you shut it off... push the brake pedal. You will hear it whoosh

 

[ford4wd08]

@Uncle Gump @19Walt93

I drove it again. It does hiss when I press the brakes and hold the brake pedal mid stroke.

If I hold it to the floor it stops.

 

[19Walt93]

Time for a new booster.