Electric Fuel Pump Inertia Switches

An electric fuel pump inertia switch aka the fuel pump shut-off switch is an electric button included in specific cars with an internal combustion engine.

Fuel pump shut-off switch purpose

The main function of the fuel pump shut-off switch is to turn off the fuel pump when it realizes that the car has stopped too forcefully. The switch is a safety mechanism that deactivates the fuel pump to stop flow and fuel leaks from becoming a serious safety hazard. This electrical component is crucial and if it were to ever have the switch tripped you can restore the fuel pump with the flick of a button.

Common problems with a faulty electric fuel pump inertia switch

A defective electric fuel pump inertia switch can lead to the engine stalling, failure to start, or the switch tripping unexpectedly.