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.
When do fuel injectors have constant 12V?
Plugged in motor not running key on you will have 12v on both wires only when the ecu grounds the injector will you have a 12v 0v split most dvoms are not fast and will not see this as 12v to 0v. I have no idea what would cause that. One side is hot/12v the other side is ground to fire the injector.
Why does my computer not ground my injectors?
More than likely the driver in the computer for that injector has failed. The injectors are provided with constant voltage. It’s the job of the computer to ground each injector at the appropriate time thru the drivers in the computer.
What should I do if my fuel injector is not working?
Hopefully, these tests have allowed you to find the issue with your fuel injectors; but, as mentioned before, it may not be an electrical problem that is causing the injector to malfunction. The next step if the injector resistance is normal would be to remove the injector and test the spray pattern it produces on an injector tester.
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.
Plugged in motor not running key on you will have 12v on both wires only when the ecu grounds the injector will you have a 12v 0v split most dvoms are not fast and will not see this as 12v to 0v. I have no idea what would cause that. One side is hot/12v the other side is ground to fire the injector.
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.
Hopefully, these tests have allowed you to find the issue with your fuel injectors; but, as mentioned before, it may not be an electrical problem that is causing the injector to malfunction. The next step if the injector resistance is normal would be to remove the injector and test the spray pattern it produces on an injector tester.