slammed83mazda
+1y
So we got the master cyclinder to pump perfect fine. The brakes are normal when the truck is off, but as soon as you turn the truck on. It goes straight to the floor, which leads me to believe my booster is crap. Seems like it's getting no vacuum at all. If you pump it about 4-5 times its okay. But as soon as you let off and go to hit it again. Same thing, no brakes at all.