I recently changed my '87 Buick " T " over to vacuum brakes, I used a set-up off an '86 Caprice 10 3/4" booster w/master cyl. All the parts bolted up ok but I had to drill and tap the intake plenum in order to get 16.5-17" vacuum. The pedal is pushed all the way back to it's limit installed. Pedal seems Stiff to push, and is Hard then goes down off panic stops. Will not even lock up front brakes on hard stops. This set-up does not work much better than the Powermaster. Whats going on here???? Any help would be greatly appreciated. Kcuster57@aol.com
2006-11-18 17:02:26 · 1 answers · asked by Anonymous in Cars & Transportation ➔ Maintenance & Repairs
It sounds like the vaccumn canister is not holding vaccumn.( weak or cracked diaphraim) Also did the swap come with a regulator valve (porposting) to set rear and front psi? Make double sure the system is bled well.. In addition the master cylcinder has a shuttle rod that must be centered up in order to porposition the fluid front and rear.Have a fun day and good luck.
2006-11-19 00:17:04 · answer #1 · answered by ? 4 · 0⤊ 0⤋