![](https://www.hondabook.ru/img/hr-v/0504.jpg)
1. plunger body; 2. filter; 3. solenoid coil; 4. core; 5. plunger; 6. distribution fuel line; 7. sealing ring; 8. intake manifold; 9. fuel injector; 10. spacer ring; 11. O-ring
Description
Fuel injectors - solenoid driven, constant stroke, pin type, consist of a solenoid, needle valve and housing. When current is applied to the solenoid coil, the valve rises and fuel is injected under pressure. Since the needle valve lift and fuel pressure are constant, the amount of fuel injected depends on the length of time the valve is open (those. from the duration of the current supply to the solenoid coil). The fuel injector is sealed by an O-ring and a sealing ring in its upper and lower parts. These seals also contribute to noise isolation.
Examination
Note: Before testing, check the following items: idle speed, ignition timing and CO concentration at idle speed.
If the engine is running:
1. While the engine is running at idle speed. disconnect each fuel injector connector in turn and check for a change in idle speed.
- If the drop in speed x.x. almost the same on all cylinders, fuel injectors are fine.
- If, when any fuel injector is turned off, the idle speed or the mixture quality remains the same, replace the fuel injector and retest.
2. Check the click of each fuel injector with a stethoscope while the engine is running at idle speed.
![](https://www.hondabook.ru/img/hr-v/0505.jpg)
If any fuel injector does not make a clicking sound, replace it and check again if the new one clicks.
If there is still no click, check the following:
- Is there a short, open, or loose connection on the BLACK/YELLOW wire between the PGM-FI main relay and the connector.
- Is there a break or rust in the connector.
- Is there a short, open, or loose connection on the BLACK/YELLOW wire between connector and fuel injector.
- Is there a short, open, or loose connection in the wire between the fuel injector and the ECM/PCM.
If OK, check the ECM/PCM and PGM-FI main relay (see below).