What to know about the Vacuum Pump:
While all gasoline engines generate vacuums during operation, sometimes the amount generatedisn’t enough to power the accessory systems in the car. Diesel engines do not generate vacuums at all during operation. In both of these instances, a vacuum pump is used to either augment or provide the vacuum power necessary to operate the various other systems on the car, including the brakes, some HVAC functions and more. The vacuum pump is usually situated behind the engine, mounted near the firewall and close to the master cylinder and brake booster. It’s easily recognizable for its two nozzles on top, as well as the design of the canister. It is an electric air pump that sustains a constant amount of vacuum in the vacuum reservoir behind the front bumper. If the vacuum pump stops working or develops a leak, the engine compartment may release a hissing sound, the heater controls may not switch when operated, or the brake pedal may be hard to depress.
Facts to Note:
The vacuum pump is an electronic device that can experience both electrical and mechanical problems.
The vacuum pump is not designed to be serviced, so it will not be inspected during routine maintenance aside from a vacuum line inspection.
Leaks in vacuum lines can mimic symptoms of vacuum pump failure.
How to Fix:
The defective vacuum pump is located and identified
The valve vacuum pump is then detached
The new vacuum pump is then installed
The brakes are tested for proper vacuum pump operation
The vehicle is road tested and checked for proper vacuum pump and brakes operation
The vacuum pump, which is expected to last the life of your vehicle, does not receive any upkeep and is only serviced when it malfunctions. If you are experiencing symptoms related to the vacuum system, have your vehicle diagnosed by one of our expert mechanics.
SEE ALSO:WHAT ARE SIGNS OF A BAD VACUUM PUMP
Common symptoms indicate you may need to change the Vacuum Pump:
Heater controls don’t operate properly
A hissing air sound is present
Brake pedal is very hard to press
Importanceof this service:
If the vacuum pump malfunctions, your brakes may not function properly and vehicle operation turns unsafe. Have your vacuum pump changed immediately if it is diagnosed as faulty.