Brake pedal hard & hissing

[Ajetsprt]

Hi everyone,
I have a 1992 coupe and over the past week noticed the brake pedal at times extremely hard to press down and feeling like the car isn't going to stop. Yesterday I noticed for the first time that if I have the brake pedal pressed down I can hear a fairly loud hissing inside the car like an air leak. I pulled the trim panel off under the dash and the hissing sound is coming from where the rod goes through the fire wall. Any ideas?

 

[Kevo]

you need a brake booster. If it has brake fluid in it you will need master cylinder also.

 

[WhalePirot]

Surely a vacuum leak. Open the hood to get a closer ear (listen/look) to ensure it's not the hose or fitting, but the booster itself.

 

[Ajetsprt]

Any suggestions on where to get or what manufacturer on the brake booster?

 

[91corvette]

Had to put one on my 91 last summer. Corvette Central.

 

[Ajetsprt]

Thank you!

 

[Ajetsprt]

Brake booster replaced and back on the road. The pedal doesn't engage as high as I'd like it to but we have brakes again! Thank you!!!

 

[91corvette]

Same thing here. Pedal not as high but good brakes again.