Fuel Injector: Testing and Inspection

CAUTION: Keep injector clear of sparks during the test.

Lines At Fuel Filter:

Inspect Injector Operation
- Disconnect the fuel hose from the fuel filter outlet.
- Connect the union and hose to the fuel filter outlet.


HINT: Use the vehicle's fuel filter.

Line Connection:

- Remove the fuel pressure regulator.
- Connect the fuel return hose and hose to the pressure regulator with union, new gaskets and union bolt.

Injector Connection:

- Connect union and hose to the injector, and hold the injector and union with clamp.
- Put the injector into a graduated cylinder.

HINT: Install a suitable vinyl tube on the injector to prevent gasoline from splashing out.

- Reconnect the battery negative (-) cable.
- Turn the ignition switch ON.

NOTICE: Do not start the engine.

Jumper Installation:

- Using a jumper wire, connect terminals +B and FP of the data link connector 1.

Checking Injector Operation:

- Connect wire to the injector and battery for 15 seconds and measure the injection volume with the graduated cylinder. Test each injector two or three times.


Volume:
34 - 44 cc (2.1 - 2.7 Cu in.)/15 sec.

Difference between each injector:
5 cc (0.3 Cu in.) or less

- If the injection volume is not as specified, replace the injector.


Inspect Leakage
- In the condition above, disconnect test probes of wire from the battery and check for fuel leakage from the injector.

Fuel drop:
One drop or less per 3 minutes

- Disconnect the battery negative (-) cable.