What Is A Cruise Control Vacuum Reservoir?

When you set cruise control, the vacuum reservoir is what artificially monitors the pressure in the pistons. By harnessing pressure, the vacuum ensures the vehicle speed is kept steady, in position and at the speed it is set at. Without proper functioning, the car begins going haywire. The reservoir stores a space of vacuum when supply runs low, and the cruise control vacuum now has more flexibility in maintaining the constant flow of air to keep pressure. When you speed up your cruise control, this reservoir ensures your car can keep its position and maintain speed.

Common Signs And Symptoms That You Need to Replace A Cruise Control Vacuum Reservoir

• Cruise control is not smooth - can lurch and cause feelings of queaziness
• Cruise control surges to high speeds when not asked to do so
• Vacuum-operated parts such as AC, heater and power brakes also function improperly
• Cruise control will not sustain speed (drops in speed or fails to maintain position)

How Important Is This Service?

As a convenience feature, you don’t necessarily need the cruise control fixed. When you are ready, have it replaced. The only time we recommend you get it done as soon as possible is if other parts also begin to malfunction and it hurts your in-car experience.