Hissing sound

40

Asked by Jan 10, 2016 at 02:43 PM about the Jeep Cherokee

Question type: Maintenance & Repair

My 2000 Jeep Laredo is making a hissing sound
coming from the brake pedal. When brake pedal is
pushed hissing stops and engine idles at less than
normal. Patient continues with car started with no
pressing on the brake and even with the e brake off
engine in park. Anybody know what the problem is
and how I would fix it?

8 Answers

54,435

Sounds like the vacuum brake booster may be leaking and bad.

3 of 3 people found this helpful.
6,765

Sounds like the brake booster seal where the brake pedal rod goes into it is leaking vacuum into the cab of the truck. Likely that the booster needs replaced.

2 of 2 people found this helpful.
6,765

Great minds Bob, typing again at the same time.

2 of 2 people found this helpful.
54,435

Guy, beat you by 12 seconds. LOL

2 of 2 people found this helpful.
40

Thanks y'all

2 of 2 people found this helpful.
40

is it safe to drive tell Monday

1 of 1 people found this helpful.
6,765

Unless its loosing enough vacuum to make the pedal hard to press it's just annoying for now.

2 of 2 people found this helpful.
40

Awesome thanks man I appreciate it

1 of 1 people found this helpful.

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