sometimes the proportion valve will close or partially close when the system feels a big loss, because most of the newer stuff in a single reservoir. sometimes i have needed to leave bleeders open and hit brake pedal like a panic stop to open it back up.
i was Leary after being told that by the gm dealer, but it worked, it was either that or a new prop valve.
this was on a 98 3/4 ton chevy truck
|