How do you test a test light with injectors?
Unplug the electrical connector from the fuel injector you want to test. Turn the ignition switch to the ON position. Touch the terminals (one at a time) of the harness connector with the test light. One of the terminals should make the test light glow, this is the injector power source coming from the computer.
Where is the test light on a fuel injector?
With none of the injectors connected, the flickering pulse should transmit through all of the wires without any issue. Use the test light to confirm this on the wire for the last fuel injector clip (at the end of the fuel rail). Keep the test light connected as you reconnect each fuel injector one by one.
What do you do with broken fuel injector plugs?
You can dismantle your existing broken fuel injector connector / plug using a terminal release tool (or a very small and thin screwdriver or a dental probe). You reuse your existing wires; first cut off the old metal terminals, and then you crimp the new metal terminals on the existing harness wire.
How to check the fuel spray on a TBI system injector?
You can visually inspect the fuel spray on TBI system injectors. Fuel flow spray is readily accessible, making it fast to check for potential problems. Remove the cover off the air cleaner housing (where the air filter lives). Ask an assistant to start (or crank the engine, if it doesn’t start). Check the spray pattern coming our of the injector.
What does it mean when fuel comes out of injector?
* Fuel should come out partially atomized in an inverted V pattern. A single, solid spray or irregular pattern means the injector needs cleaning, or that an internal part wore out or broke. You can try to fix an irregular fuel spray pattern by adding a quality cleaning fuel system additive to the fuel tank.
With none of the injectors connected, the flickering pulse should transmit through all of the wires without any issue. Use the test light to confirm this on the wire for the last fuel injector clip (at the end of the fuel rail). Keep the test light connected as you reconnect each fuel injector one by one.
You can visually inspect the fuel spray on TBI system injectors. Fuel flow spray is readily accessible, making it fast to check for potential problems. Remove the cover off the air cleaner housing (where the air filter lives). Ask an assistant to start (or crank the engine, if it doesn’t start). Check the spray pattern coming our of the injector.
* Fuel should come out partially atomized in an inverted V pattern. A single, solid spray or irregular pattern means the injector needs cleaning, or that an internal part wore out or broke. You can try to fix an irregular fuel spray pattern by adding a quality cleaning fuel system additive to the fuel tank.
When to start troubleshooting on a Jaguar XJ?
If you have a ballast which checks good at both terminals but no voltage at the “+” coil post, then check for a wiring fault between the ballast and the coil. If you don’t have a ballast you should have voltage at the “+” coil post if your wiring is OK, as mentioned earlier.