Can a fuel injector be turned off with the key off?
The fuel injectors should not be receiving any power with the key off, or with the key on engine off (except for 2 seconds during pump priming). The injector positive voltage is supplied along with the fuel pump positive.
How does the engine control unit ( ECU ) work?
The ECU can then perform an action on the engine, allowing the correct amount of power to control actuators precisely. These can include controlling fuel injector pulse width, exact timing of the ignition system, opening of an electronic throttle body or the activation of a radiator cooling fan.
How do you replace the fuel injectors in a car?
How to Replace Fuel Injectors. The metal rod over the fuel injectors is the fuel rail. Use the socket and ratchet to remove the bolts and brackets holding the fuel rail in place. Depending on the model, some engines will need the fuel line disconnected from the fuel rail in order to move the rail.
When to reset the ECU after changing an O2 sensor?
Sometimes an O2 sensor fails, and you need to replace it. Once you’ve replaced your vehicle’s O2 sensor, you’ll need to reset the ECU so it can properly gather information from the new O2 sensor.
How to Replace Fuel Injectors. The metal rod over the fuel injectors is the fuel rail. Use the socket and ratchet to remove the bolts and brackets holding the fuel rail in place. Depending on the model, some engines will need the fuel line disconnected from the fuel rail in order to move the rail.
How do you check for fuel injector leaks?
Turn the key to the on position and wait 10 seconds before turning to engine start. This will allow the fuel pump to refill the lines and fuel rails before the engine cranks. After the engine drops to the normal idle RPM, turn the engine off. Take a flashlight and check all the injectors for fuel leaks.
What happens to fuel injector when engine is shut off?
Fuel injectors deliver fuel to the combustion chamber directly or indirectly. During its evolution; the fuel injector has moved from the intake manifold to the combustion chamber. Over time the nozzle of the injector can become dirty; and partially blocked. When you shut off your engine; the injector will soak up the heat of the engine.
What is the code for a fuel injector failure?
If you are using a generic (not vehicle manufacturer specific) code reader; then you can expect to see codes beginning with P02. For example, a fault with an injector in cylinder one would give a code of P0201.