I can put the brake pedal almost all the way down the first time, then the second pump is only about halfway. This is after the car was sitting for a weekend. What part number is this check valve in the dmc parts guide? thanks, Adam 16683 --- In dmcnews@xxxxxxxxxxxxxxx, "Jim Reeve" <ultra@xxxx> wrote: > The vaccume check valve for the brake booster also holds vaccume for > the vent flaps. If this isn't holding vaccume after shutting off > the engine, that would return the flaps to their resting position > (closed) everytime you turn off the car. And of course, they would > return to their vaccumed position after you restart the engine. How > far can you push down the brake pedal with the engine off? > > Jim Reeve > MNDMC - Minnesota DeLorean Club > DMC-6960 [moderator snip]