solid brake pedal

[madwelshman]

To test the vac pump, with the engine off, pump the brake pedal about 6 - 8 times until really hard and on the last push, keep the pressure on it and start the engine. If the vac pump is working properly the pedal should drop down to normal brakes applied position once the engine starts and runs for a second or two. Or, pull the pipe (to the brake servo) off the vac motor, start the engine and put finger over the inlet port you've just removed the pipe from and see if there's vacuum there.
That/those will test the vac motor if nothing else.