What does the EFI main relay do?

What does the EFI main relay do?

Because the EFI Main Relay supplies battery voltage to the B terminal of the check connector when the ignition switch is in the run position, this is an excellent place to perform a quick check of the relay function.

Does the EFI fuse control the fuel pump?

EFI fuse powers your circuit opening relay,fuelpump and sender,O2 sensors, IAC valve,MAF meter, VSV for EGR, VSV for EVAP, VSV for pressure sensor, ECM, and Point side of the EFI relay.

What EFI in a car relay?

The EFI relay is a heavy duty electronic switch that requires very little voltage to switch on at the same time It may connect a moderate amperage circuit without the switch wearing out. It is also designed to disconnect if overloaded.

Where does a fuel filter go?

The fuel filter is located somewhere in between your fuel tank and your engine. Typically, the fuel filter is either located inside the fuel tank (in the opening of the fuel line, which feeds gas to your car), or somewhere in the fuel line (this is usually at the bottom of your car.)

Why does my EFI fuse keep blowing?

There are several EFI components protected by that fuse and any one of them can cause the fuse to blow, my bet is on the fuel pump needs replaced as it draws the most current and will draw more current as it ages. One other thing can cause it is a short to ground in the wiring, which is rare.

How is the fuel pump relay powered up on a EFI vehicle?

When you turn on the ignition, the fuel pump relay is activated and will supply electricity to turn on the fuel pump. When you shut off the ignition, it powers down the fuel pump.

What kind of current does an EFI relay supply?

Generally speaking, the EFI Main Relay supplies current to the following major circuits: • Injectors (dual relay or dual contact relay only) • Circuit opening relay (power contact and pull-in windings) • Air flow meter VB circuit (when so equipped)

Where is the EFI injector located in a car?

The EFI injector is a solenoid- operated device, controlled by the ECM, that meters pressurized fuel to a pair of cylinders. The fuel injectors are located inside the induction manifold on the fuel rail. The injector receives signals from the Electronic Control Module.

How does an electronic fuel injection system work?

Electronic injection systems. An electronic system is operated entirely by a microprocessor control unit. This measures factors such as the engine temperature, the throttle position and the engine speed to compute the fuel/air mixture required by the engine and its timing to the injectors.

Which is the best throttle body EFI system?

The FiTech Go EFI System is the industry’s most advanced throttle body EFI system and also the easiest to install. It includes a very advanced Handheld Con- troller but is also capable of being far more tunable than any competitive product that utilizes a Handheld Con- troller.