i have a 1990 toyota pickup 3.0 automatic 4x4. when i bought the truck the brakes were not the best meaning at that time it didnt have alot of pressure. my buddies and i went 4x4ing one weekend we were going do the side of this mountain, a simple trail, for about 45min. we were in descent when i keep having to pump the brakes to keep pressure intill one time i did it hit the floor. driving it back i had to limp it in use the hand bake no pressure at all. since then ive replace the master cylinder and blead the brakes including the preportioning valve but i still dont really have much. i read something about the abs relay dont really know anybody can help i would appriciate it.