What is the Fuel Pump Relay?
Every time you turn on the ignition of your car, you activate the fuel pump relay. This device directs an electric current to the fuel pump. Upon receiving this current, the fuel pump directs gasoline to the engine and the car starts running. While the fuel pump is active as long as the car engine is running, the fuel pump relay operates only at startup and when you turn off the ignition. As long as the car is running, the fuel pump runs on the power it receives from the oil pressure sending unit or any other such power source.
The fuel pump relay is also known as the relay switch and its jobs are similar to those of the automotive fuse. Controlled by the engine control module, the fuel pump relay controls the current sent to the fuel pump. This device is a black plastic component, set in a small box with a wiring harness attached to its underside. Its sprockets attach to the engine assembly. With regards on the make of the car, you will find the fuel pump relay under the hood or under the dashboard, near the steering wheel of the car.
Facts to Note:
Fuel relay pumps can oxidize or rust and need to be changed more frequently that the fuel pump.
Typically, the coil and contact points of the fuel pump relay show damage.
How to Fix:
The vehicle hood is raised and held
The faulty fuel pump relay is removed
The new fuel pump relay is installed
The fuel pressure is tested and codes cleared with a scanner or gauge
The vehicle hood is closed and road tested for proper operation
The fuel pump of the car is a costly device that operates well with the optimal amount of current. If it receives excessive power, the wiring system around the pump overheats, and the fuel pump could get damaged or fail completely. The fuel pump relay has a limited lifetime so you should have our expert mechanics check it every time your brakes are changed.
Common signs indicating you may need to change the Fuel Pump Relay:
Engine cranks but does not start at all.
Engine functions irregularly and does not start right away
Car slows down without your braking
Car comes to a halt after running only for a short distance
Importance of this service:
If the fuel pump relay does not function appropriately, it will not activate the fuel pump and your car will not start. Further, a faulty fuel pump relay could conduct too much power to the fuel pump and cause damage to or ruin it completely. This is why we recommend that you keep the fuel pump relay in perfect working order at all times.