I have been having issues with keeping my engine running and having it stall when stabbing the throttle and even after idling for a couple of minutes. I started clamping off vacuum hoses to see if I could find a leak. When I clamped off the hose for the brake booster the engine idle slowed down 100 rpm and vacuum reading smoothed out. I can blip the throttle with no hesitation now... that leads me to believe my booster has an issue. The FSM doesn't have much in ways of testing the booster. Does anyone have an idea on what to do to test if the diaphragm is blown? I tries a vacuum hand pump, but i think its too small to pull enough vacuum.