Chuckdiesel
Full Access Member
Ok well usually breaks are real simple and most problems are easy to find, however I dont know whats up. First off, the previous owner replaced the break booster and master cyilnder. the problem is that when I push on the petal while driving, the first time is weak, lots of petal travel, but if i press it again its hard like it should be. Also, I have noticed that if I hit the breaks at the same time i push in the clutch, like at a light, its fine but if i slow down or coast and then hit the breaks its soft,so the secoend time its hard.----When the truck is off the petal is hard, but when I press the petal air bubbles up in the master cylinder,plus theres a thunk that i believe comes from the rod thats attached to the petal that goes in to the booster, and in that spot thats when air bubbles out. Remember that the master cylinder and booster were replaced by a not so very qualified guy. So im lost any ideas. oh yea and the booster moves like a 1/8-1/4 inch or so when i push the breaks with the truck off. oh and i have a new vaccum pump