When my car is at idle and I push the brakes a few times my car will start to bog down and die. Could this be a brake booster leak???

 

hello

 

Probably not, depending on how much it bogs down.

If you repeatedly pump the brake pedal, you can expect that the idle will change somewhat. This is because you're creating a vacuum 'leak' in the booster, since when you pump the brakes, it draws a vacuum from the intake manifold. The brake booster line has a one-way valve in it that prevents the brake booster pressure from making it's way back to the intake an causing vacuum problems. When you pump the brake pedal at idle, it works through this one-way valve resulting in a slight vacuum leak at your intake.

What normally will happen is that you apply the brakes once, the engine bobbles for 1/2 a second and then stablizes since you're not drawing additional vacuum by pumping the brakes.

What you described is normal as long as your idle doesn't drop so much that the engine dies. If so, this may be a poorly set idle, idle mixture, or a bad one-way valve to the brake booster. HTH,