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Your engine is a giant air pump that sucks in air on the intake stroke, which pulls air through the air box and into the engine. If the throttle is closed, then the intake stroke creates negative pressure, which is known as vacuum. That vacuum is harnessed to operate many of the systems on your car. Vacuum hoses connect from supply points on the engine and run to other components in order to supply them with the negative pressure needed. The negative pressure is regulated by valves or solenoids to open, close or adjust the amount of vacuum a device requires. If the vacuum hose is cracked, leaking or missing, the component supplied by that hose may not receive enough negative pressure to operate its valve or solenoid. Additionally, the engine may not run properly if vacuum pressure cannot be maintained due to a leaking hose.
While vacuum hoses are not typically serviced, they should be inspected on a comprehensive checkup. A simple visual inspection is often enough to determine the condition of most vacuum hoses, allowing you to replace worn hoses before they begin to leak. If a vacuum hose is leaking or in poor condition, have one of our expert mechanics replace it.
Some vacuum hoses operate accessories that are not required for safe operation of your vehicle, while other vacuum hoses are for critical components. If the vacuum leak affects your engine’s operation, have it replaced immediately.