double check me here a friend's 1997 avenger is running weak and when she hits the brake, it stumbles or dies. my first thought: vacuum leak, possibly at the manifold gasket, throttle body gasket, vac hoses, etc. i haven't seen the car while it's been acting up. i told her to run through the gears and tell me what happens. stumbles/stalls in all gears, but park. when i had her press the brake while in park, it did stumble to. so, to me, it's obviously a vacuum issue. she doesn't believe me, though. other thoughts?