A vacuum leak occurs when the vacuum system in your Ford allows air that is not metered into the engine. Unmetered air causes an inappropriate amount of fuel to be released into the engine, causing the vehicle to run on lean. A vacuum leak can cause severe engine damage.
Several signs indicate a vacuum leak, with the most obvious being the check engine light coming on. Other signs of a vacuum leak include fuel economy drop, an audible hiss from your vehicle’s engine, the inability of the car to maintain a stable RPM when idling, mistimed ignition, engine stalling when stopping, and misfiring engine.
You should seek Ford repair services from TSC Ford Specialist if you notice any signs of a vacuum leak.