Brake boost leak?

[Fjo92]

I recently bought a 22. Do all rangers come with a loud break pedal? Like a loud hissing sound when breaks are applied? I took into the dealership and they said that it’s normal operation. Anyone have this issue?

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[Joeiconic]

Your breaks may be fine, but also have them check the brakes.

 

[Fjo92]

I got a call from the dealership and they said everything is fine. Its a loud hissing. I hope the sound dampens as it ages.

 

[Frenchy]

Sounds like a leaking brake booster to me. That said without me being next to the truck I cant say

 

[Fjo92]

It sounds like this.

 

[DukeCanBuildit]

The brake pedal in these trucks is louder than in other vehicles I’ve owned and driven. There is a definite “whoosh” or “hiss” when you press down on the pedal. It could simply be brake vacuum but I’m no engineer. Whatever it is, I’ve heard it in other vehicles and it’s normal.

 

[Fjo92]

The brake pedal in these trucks is louder than in other vehicles I’ve owned and driven. There is a definite “whoosh” or “hiss” when you press down on the pedal. It could simply be brake vacuum but I’m no engineer. Whatever it is, I’ve heard it in other vehicles and it’s normal.

Thank you for clarifying this.

 

[Jason B]

If it was a leak on the vacuum side of the booster, you'd probably get all kinds of ECU codes, possibly with fuel mixture too lean. I think the woosh and hiss heard is the air entering the into back of the booster. You need a pressure differential to get any vacuum system to work. Vacuum doesn't suck in the brakes; it is the air entering the rear that pushes the brake rod.

 

[Fjo92]

If it was a leak on the vacuum side of the booster, you'd probably get all kinds of ECU codes, possibly with fuel mixture too lean. I think the woosh and hiss heard is the air entering the into back of the booster. You need a pressure differential to get any vacuum system to work. Vacuum doesn't suck in the brakes; it is the air entering the rear that pushes the brake rod.

How far in is the break pedal suppose to go in? My break isn’t as responsive as other vehicles. The pedal goes in about 1/4 way before it actually breaks.

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