Idle/Brake problem

I got a 91 Geo Metro 5 speed hach, So the problem is when i drive it and stop on the red light the rpms drop almost to zero, Now that only happens when i step on the break Can somebady give me some ideas what could couse this, Thanks

I got a 91 Geo Metro 5 speed hach, So the problem is when i drive it and stop on the red light the rpms drop almost to zero, Now that only happens when i step on the break Can somebady give me some ideas what could couse this, Thanks

Possibly a vaccum leak in the power brake booster. To check, either pinch off or disconnect and plug the hose from the motor to the brake booster, then depress the brake pedal. If the RPM's do not drop, replace the booster.
Thanks
R. Smith

thanks im Gonna have to check it over the weekend thanks alot