vac leak behind dash??

[RunUoveR]

past few days ive been noticing a bit of a hissing noise behind the dash, on and off. sounds like a vac leak but im curious what vac lines would be in that area?

today i also noticed that if i jiggle the shifter around a bit it made the noise stop or atleast change a bit

so whats up??

thanks

[Grand Marquis GT]

It's probably the auto parking brake release. Find the line down by the parking brake lever, and plug it.

[gadget73]

yeah, parking brake release. Its mounted to the column up against the firewall. WHite half moon looking thing.

[CheeseSteakJim]

If you want to replace it I have a perfectly working one I might be willing to part with.

[RunUoveR]

the auto brake release fnction actually still works fine, tested it today. didnt have the chance to get under there though. could it be a hose came undone or cracked

[86VickyLX]

the auto brake release fnction actually still works fine, tested it today. didnt have the chance to get under there though. could it be a hose came undone or cracked

Mine worked fine too, but it still leaked. Capped the line and no more hissing.

[gadget73]

yeah mine worked, but leaked badly. Capped the line off to fix it permanantly on mine as well. The Mark VIi has a bad one too. It will release the brake, but it hisses annoyingly.