installed egr system including new hoses. bled system at least 5 times . no air. i have fair brakes but cannot lock front on pavement. all will lock on dirt but antilock releases rear as it should. my problem is when making a panic stop i can depress pedal another 4 inches without any increase in braking effect. i have about 2000 miles on new system. hydro boost seems to pass test as decribed in 99 service manual. i have bled propional valve & rear antilock valve as well as master cylinder. still feels like air to me . any help would be greatly appricated. thanka in advance. walt gilmer trapper creek ak.