I own a 89 nissan p/u, 4cyl, 5spd, 4x4, reg cab. The problem I am having occurs if I pump the brake pedal 2-3 times rapidly. The truck will try to stall out when at idle. I found this out when the master cyl. was going out and I had to pump the brakes while stopping. I have replaced the master cyl. and brake booster. I now have a great pedal and the truck stops fine but at an idle if I pump the brake pedal it starts to stall. Is there some kind of check valve or possible vacuum leak that I have? All I can see is a hose that comes from the booster, it goes into some sort of connection with a couple vacuum ports (witch are blocked and not leaking), then goes straight into the top of the intake. Any help would be great. Thank You
Dec 5, 2009 at 3:19 PM