What happens when a cruise control vacuum fails?
What happens when a cruise control vacuum fails? If the cruise control vacuum reservoir fails, the cruise control system will be left without the vacuum it requires to hold the vehicle at a steady speed or rate of acceleration. The cruise control may still try to hold the vehicle at a certain speed, however, it will eventually run low on vacuum which will cause the vehicle to slow. What are the signs of a bad cruise control? Common signs include speed surges and inability to maintain speed on cruise control, as well as general engine performance issues. 1. Speed surges...