What kind of wire is a fuel injector?
For mine the middle orange/black wire was the sense wire, the black/blue wire was ground, and the dark purple/white wire was the reference voltage. Then it was just a matter of stripping the wires, removing the old connector from the harness and soldering the new connector in place.
How does a fuel injector work in an engine?
Fuel injectors are a particular type of solenoid that are made to actuate their pistons very quickly. This allows the injector to deliver precise amounts of fuel into the cylinder, even while the engine is spinning at higher RPMs.
Why does my injector keep switching to ground?
They very likely switch ground as that’s actually easier to do, electronically. If you see power across the coil of that particular injector all the time, you may have a pinched wire that’s now shorted to ground, for instance. More than likely the driver in the computer for that injector has failed.
What should the ground voltage be on an injector?
One will be connected to ground and will read 0 volts. The other should read around 12 volts. Step 5: Repeat with all injector wiring harnesses. Leave the ground lead in position and test all of your injector wiring harnesses. They should all be around 12 volts. A lower reading means there is excess resistance in the wire somewhere.
How to test the wiring on a fuel injector?
How to Test Injector Wiring 1 Electrical Short Testing. Disconnect all the fuel injector electronic plugs on the engine. 2 Voltage Testing. Turn the ignition key to the “On” position. 3 Fuel Injector Resistance Testing. Turn the multimeter to “Ohms.” Place the multimeter leads into the fuel injector plug terminal.
One will be connected to ground and will read 0 volts. The other should read around 12 volts. Step 5: Repeat with all injector wiring harnesses. Leave the ground lead in position and test all of your injector wiring harnesses. They should all be around 12 volts. A lower reading means there is excess resistance in the wire somewhere.
What is the role of the fuel injector in an engine?
The fuel injector is the main actuator in a modern fuel injection systems. It is responsible for supplying the engine with fuel for combustion. In order to obtain the near perfect air/fuel ratio in today’s engines, the injector must meter and deliver a precise amount of fuel into the intake runners.
Is the hot wire the same color for all injectors?
The hot wire should be the same color to all injectors, but the ground seeking wire should be a different color for each injector. With power off, unplug the harness from the injector and check the resistance of the pin on the harness (not on the injector) that the ground seeking wire is attached to and a nearby ground. Check a couple of plugs.