k so the other day i was drivin my civic and i went to the grocery store and when i came back out and started my car the brake pedal was hard as a brick to push and i started driving a bit and all the brakes were almost locked up wtf huh. well i just blead the master cylindes lines on the side of it and i had a perfect pedal again. then i drove it for a while and this time the pedal got hard as a brick and they almost locked up again. im just wondering if anybody has experenced this b4 i never have i think im gonn bleed them all but jw if anyone knows wat to do. Thanks

 

TTT

 

any help????

 

Could be your brake booster going out. Check the hose coming off the BB going to the IM, make sure it is not damaged.

 

TTT