Popular Mechanics’s automotive experts outline the tools and techniques proven to smoke out even the toughest to find vacuum ...

Most brake boosters run on a vacuum produced by the engine. The cause of booster failure can be as simple as a loose vacuum hose or a ruptured diaphragm that requires component replacement.

This recall includes the Jetta, Golf, Passat, and Beetle. The camshaft lobe that can break off drives the brake vacuum pump, and if the problem occurs drivers would lose power assistance and ...

Engine vacuum is used to reduce the amount of effort you need to press the brake pedal, for example. Some emissions control systems also rely on this negative pressure to prevent crankcase fumes ...

Vacuum leaks can develop in many locations, including the intake manifold, throttle body evaporative emissions system, power brake booster, and several other places, because some vehicles have a ...