VIDEO: Brake Boosters And Vacuum Pumps Diagnostics

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VIDEO: Brake Boosters And Vacuum Pumps Diagnostics

A lot of modern engines do not produce a lot of vacuum when the throttle is closed. This video is sponsored by ADVICS.

Andrew Markel
By Andrew Markel
Andrew Markel is the director of content for Brake & Front End magazine. He has been with Babcox Media for 20 years. He is a technician and former service writer and holds several automotive certifications from ASE and ­aftermarket manufacturers. He can be reached at [email protected].
Published:

Here is the situation. You have a vehicle in the bay and the brake booster is not working and the customer is complaining about a hard brake pedal. Inside the brake booster is oil. Next, you follow the line from the booster to the engine.

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But, the line does not connect to the intake manifold. Instead, the line connects to a pump that is driven by the exhaust camshaft.

This is a vacuum pump is designed to produce vacuum to the brake booster and other items on the engine like the turbocharger wastegate and diverter valve. Why?

A lot of modern engines do not produce a lot of vacuum when the throttle is closed. In this video, Andrew Markel describes the how the pump can fail and the symptoms of a hard brake pedal.

This video is sponsored by ADVICS.

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