Fuel injectors and distributor (CR-V 1997-98): 1, 2. Connectors; 3. Pulsation damper; 4. Fuel distributor; 5. Nozzle |
Fuel injectors and distributor (CR-V 1999): 1. Pulsation damper; 2. Fuel distributor; 3. Nozzle; 4. Fuel pressure regulator; 5. Ring; 6. Shock absorbing bushing; 7. Seal |
1. Disconnect the battery from ground.
2. Perform decompression.
3. Disconnect the connectors from the fuel distributor
4. Disconnect the vacuum hose and fuel line from the pressure regulator.
5. Loosen the bolts and remove the fuel distributor.
6. Remove the nozzles by rocking them from side to side and pushing them upwards.
7. Installation is carried out in reverse order. Replace all seals, lubricate the injector rings with engine oil. Secure the injectors with clamps. When finished, turn on the ignition for 5 seconds and make sure there is no gasoline leak. Then fill the system with gasoline by turning the ignition on and off several times.
Examination
1. The operation of the injector is listened to with a stethoscope at idle speed (the head of the stethoscope should be applied to the body of the injector). Regular clicks in time with the operation of the injector valve should be clearly audible. The manufacturer recommends combining the injector check with the spark plug insulator check, which can be used to assess the mixture composition and determine the cause of unstable engine operation.
2. The reason for enrichment of the mixture by the injectors may be:
- pressure regulator malfunction,
- increased fuel pressure, leaking injectors,
- clogging of the vacuum hose of the pressure regulator.
Reasons for lean mixture:
- pressure regulator malfunction,
- decrease in fuel pressure,
- clogged injectors,
- sticking of injector valves,
- injector winding failure,
- poor ground connection,
- or the absence of voltage pulses on the injector winding.
3. If clicks are heard on all injectors (and it is known that the ignition system is in good working order), then you should check the cone of the fuel sprayed by the injector on the stand. To do this, remove the injector, connect it to the fuel line under pressure, connect 12 V voltage to the injector and turn it off immediately. If the cone is missing, replace the nozzle. Replace the leaking injector as well.
4. If clicks are heard on some of the injectors, then check for voltage pulses on the injector by flashing the control lamp, which you connect to the injector wire connector. If the lamp flashes, check the resistance of the inoperative injector, which should be 1.5-2.5 ohms. If the lamp does not flash, check the circuit between the terminal of the wire connector and the corresponding terminal of the connector disconnected from the processor PCM unit. The resistance should be no more than 5 ohms. If the resistance is normal, replace the PCM unit.
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