What is wrong my Brake pedal is hard ,and idle is rough when i slow or stop. on 1994 Toyota 4Runner

What is wrong my Brake pedal is hard ,and idle is rough when i slow or stop.

Asked by for the 1994 Toyota 4Runner
2 answers
Large vacuum leak!! Have a mechanic check it out, 'possible' brake booster. Check engine light on?
The EGR valve may be stuck open.