ok I have my mother in law's saturn sc1 and it has some issues. its a 93 and she noticed that it idles fine but when you step on the brakes at a light or stop sign it will sputter out till it dies. so because I love my mother in law so much I look at the car. when you are at a parked idle it will idle fine but when you step on the brakes it dies. would this be a bad booster?

 

Seems like a distinct possibility