What should I do after replacing fuel pump?
After replacing a fuel pump and fuel filter, it is highly recommended to fuel up at a gas station with good gas, such as Techron or Chevron. This fuel is very clean and has detergents that help clean the fuel system.
Can fuel pump relay work intermittently?
It is the job of the fuel injector pump relay to supply a steady flow of electrical current to the fuel pump. If there’s something wrong with the relay, you can expect the fuel pump to fail intermittently. The good news is it’s easy to check for a broken injector pump relay.
Can you remove a fuel pump relay?
Remove the fuel pump relay, which is a cube-shaped object that connects with prongs like an electrical plug. Disconnect the plug-in (and fuse, if needed) to the relay to remove it. If the relay is within the box, pry it out carefully with the help of a flathead screwdriver.
How does the fuel pump relay work on a car?
Usually, the fuel pump relay is commanded by the ECM. The ECM grounds the fuel pump relay control or primary circuit, which then feeds power to the fuel pump using the power or secondary circuit. On some vehicles, turning the key on will turn the pump, on for a few seconds, to prime the system.
How to check the fuse on a fuel pump?
Voltage Check – First, check that the battery has at least 12.6 V with the engine off and at least 13.5 V with the engine running. Correct any problems here before proceeding. Fuse Check – Check the fuel pump fuse.
Can a fuel pump short circuit be repaired?
Proceed with caution – simply replacing the fuse may result in another blown fuse until you repair the short circuit. Short Circuit Check – With the fuel pump relay removed, you should measure at least 4 Ω through the pump to ground. If you measure <4 Ω, you’ll have to find and repair the short circuit.
When does the AFM take over the pump relay?
Yep you are right The AFM takes over once it pulls enough air to open but It takes fuel Spark and air to start. The jumper on the 22RE makes the connection from Pump relay to Ground So yes the light goes out once it starts because it finds another way to ground decides the light.