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

Often times, brake booster issues can be traced back to other problems within your braking system, such as worn brake pads or ...

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.

Brake boosters assist drivers by multiplying the force they apply to the brake pedal. These boosters use engine vacuum, an electric pump (diesel engines produce little or no engine vacuum) or ...

one each to the vacuum advance on the ­distributor, the power brake booster, and the automatic transmission modulator. When emission controls became commonplace in the late 1960s, some cars had ...