Brake problem help.

[norville]

Hey folks,

Checked the searches but I want to confirm.. With the vehicle running , if I depress the brake I get an 1" or 2" of slight resistance with a whoosh. Then a very hard brake and little stopping ability. If the vehicle is off I seem to have little change . An 1" or 2" travle then very hard brake. Now I'm thinking the power brake booster, but even after a few day's I still have vaccume when I try to remove the vac hose from the booster. C

Could the check valve be bad?? The vehicle seems to run OK after inital startup, So no huge vac leak. Anything else I should look for?


Thanks for the help.

norville