Pedal hard? Idle effected when brake depressed? Sounds like a brake booster is bad
Mar 22, 2010 at 3:17 PM
JIS001
CAR REPAIR CONTRIBUTOR
3,412 POSTS
Most likely your brake booster has a vacuum leak.
Mar 22, 2010 at 11:45 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.