1999 Jeep Wrangler hissing noise

1999 JEEP WRANGLER
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IMAGXO
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  • 1 POST
inside the car i hear a hissing noise like an air hose going off.when i step on the brake pedal it goes away
Apr 6, 2009 at 1:04 PM
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BLUELIGHTNIN6
  • ✓ASE Certified Mechanic
  • 16,542 POSTS
  • ASE Certified Mechanic
Suspect faulty/damaged vacuum hose. Inspect all vacuum hoses, especially brake booster hoses since braking stops the hissing.






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Mar 15, 2021 at 2:37 PM
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MECHCURT
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  • 184 POSTS
The last post has it right but one other problem is the booster itself. They begin leaking vaccum and is heard inside the cab and it does go away when you press the pedal. You will have to replace the booster itself to fix the problem. Let us know how it comes out thanks Curt
Mar 15, 2021 at 2:37 PM
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