Jason Warrum
Newbie
Ok guys and gals…. Need a little bit of direction. 92 Yukon 5.7 Pretty sure it’s a vacuum issue. High idle when starts about 1300 rpms. When I press the brake pedal and let go of it the idle shoot’s up even more about 3-500 rpms. Did a little research and found that a bad break booster could cause the vacuum issue Anybody wann add to this or gimme any ideas if anyone has had this issue. Point me in the right direction. In the process of figuring out how to test booster. The peddle isn’t hard to push down. In fact it seems super soft and I almost had to push the pedal all the way to the floor. My 94 c1500 brakes are much tighter. Any help would be appreciated