Do you have a vacuum leak?

Do you hear a leak when you step on the brakes?

I would guess the vacuum line to the manifold is either lose or has a hole in it,possibly the checkvalve at the connectionon the brakebooster.

The other posibility is there is a problem with the diaphragm in the brake booster.

There is enough good in the worst of us and enough bad in the best of us that it does not behoove any of us to criticize the rest of us.
-
-
Be yourself. If you are ever lost, It will be much easier to find yourself if you know who you are!