Brake Booster Pushrod Adjustment

I extend the adjuster outward and hold the MC against the booster until I feel the rod touching the MC piston, note the gap and repeat, screwing the rod tip in each time. You don't want much play because that would give "lost motion" in your brake pedal. But, you also don't want the rod pushing the piston in much either since too far and the piston won't return enough to expose the "fill port". Many people have issues with that, usually from having the pedal bottom out against the brake pedal switch. Always loosen that switch and adjust it when done. You don't want the switch preventing motion of the pedal, only sensing it. Seems obvious, but many never consider that.