There is a vacuum leak that you can hear inside of car. The leak (noise) stops if you are accelerate on the gas pedal
Mar 23, 2010 at 9:58 AM
1987 Ford Crown Victoria vacuum
HAWKBACK
- MEMBER
- 1 POST
Advertisement
vacuum will go away with more acceleration. can you tell if it's from the engine compartment or behind dash? if behind dash it could be part of the heating / ac system.
Apr 22, 2010 at 4:39 PM
I started getting that hissing sound too right after the parking brake auto release stopped working. I was told the hissing sound is coming from the brake booster. That round black thing mounted behind the brake fluid reservoir. I have no clue why my brakes are still functioning. We should be worried right?
May 2, 2010 at 3:39 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement
parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.