Strange 'valve-like-release-sound' heard from accel pedal area?

[longlivetitus]

Good evening ladies & gents,

Strange thing started to happen a couple days ago with my 02 Q45 Sport. My baby starts up fine, and when I gas to take off I can hear a 'valve-like-release-sound' from the accelerator pedal area. The sound is low, and last for approximately 2-5 seconds. I'm also noticing a rough idle during the morning start ups that last for a couple minutes, and then it goes away for the day.

I wanted to know if anyone knew of any parts or components that could be the the cause to the sound, I would really appreciate your insight.

By the way, how do you upload pictures?

Longlivetitus 2002 Q45 Sport47,000 miles!

[maxnix]

By the way, how do you upload pictures?

Do you need pictures posted? CLICK HERE.

[Q451990]

WAG here, but any chance it's coming from the brake booster?

Heath

[longlivetitus]

Brake booster...interesting? Even though it happens when I step on the gas pedal and not the brakes.

Do you have any recommendations for testing the brake booster part or components?

Thanks!

[maxnix]

Check the hoses and one way check valve.

[longlivetitus]

Ladies and gents,

Just an update with the 'hiss-sounding-when-accelerating'; it turns out that my hose from the brake booster has harden and has multiple cracks causing the vacuum leak.

In fact, a couple days ago just before taking it to the shop, I lost 90% of braking! This happened as I was approaching a stop sign, my brake pedal became stiff as rock and barely able to stop.

If your experiencing similar issues, check that hose!Thanks maxnix!

longlivetitus

[maxnix]

Glad you found it!

Brakes should still work fine, just require more effort. Welcome to pre 1955 when vacuum brake boost was not common. but an option (power brakes).