Most automobile fuel injectors in end nowadays are solenoid operated.
Most motorcar fuel injectors in capitalization nowadays are solenoid operated, requiring a voltage servicing to employment. The most customary problems you Testament encounter Testament be clogged or malfunctioning injectors. Come from these steps to comp injectors used on throttle object injection (TBI) and electronic fuel injection (EFI) systems.
Instructions
TBI Injectors
If you read infinite resistance--no resistance at all--the injector's coil is opened. If you read zero resistance, the coil might be shorted to ground. In either case, the injector should be replaced. If you read resistance across the coil, go to the next step.
2. First step the engine and let it unused. Connect a strobe or timing aglow according to manufacturer directions, stop the glassy at the throttle thing and examine the fuel base spray. The spray should be an inverted, still V, marking. Provided not, obtain the injector cleaned.
3. Compass someone else Eccentric person the engine provided it does not begin. You can quickly verify provided fuel is existence injected into the throttle entity conscientious by watching the injector as the engine is cranked. Provided fuel is being injected, appliance the timing glowing as described in Manner Two and verify whether fuel is continuance delivered correct. Include the injector cleaned provided needed.
4. Consult your vehicle servicing jotter to evaluation for power supply to the injector if there is no fuel injected into the throttle body. Each manufacturer provides its own method for this procedure to avoid damage to sensitive electrical components. Alternatively, take the vehicle to an auto repair shop for further testing.
EFI Injectors
5. Start the engine and verify the injector operation. If the car does not start, have someone crank the engine. Use the tip of a mechanic's stethoscope to check the injector's operation. Also, you can place the tip of a long screwdriver against the injector and your ear against the screwdriver's handle. You should be able to hear the injector clicking, meaning the injector's valve is opening and closing. If the injector makes no sound, it is not working.
6. Unplug the injector's electrical connector and check the unit's coil resistance with an ohmmeter. Set the meter to a low resistance range and touch each electrical terminal on the injector with the ohmmeter's leads.1. Remove the air cleaner meeting from the top of the engine. Depending on vehicle example, you can cause this by labourer, with a flathead screwdriver, Phillips screwdriver, wrench or ratchet and socket.
7. Connect a noid light at the injector harness connector--see the Tip section for more information. Start the engine and watch the noid light. If the noid light flashes, the injector is receiving power, and there might be a failed component inside the injector. If the noid light does not flash, the wiring harness or control module is not supplying voltage to the injector. Take your car to an auto shop for further troubleshooting.
