I have a 1991 80 with a 5cyl engin. I am loosing vacume someware and cannot find it. the car is hard to start when warm, easy to start when cold. the power brakes are not power at low rpm but good at high rpm the cruze control dosent work and it runs rough at low idle. please help. thanks in advance

 

There are a lot of places for vacuum leaks;
injector seals
vacuum hoses
idle stabilization valve
Bellows between the air flow sensor and throttle body.
Etc.