FD4 - Fuel Injector Cleaning and Leakage Check

NOTE: This procedure does not require the matching of injector color with flow gauge band color on the Fuel Injector Tester/Cleaner.

WARNING: Before starting these tests, release the fuel pressure from the fuel system to reduce the risk of injury or fire, as outlined in Service Precautions.

- Use the Rotunda Fuel Injector Tester/Cleaner 113-0001A, or equivalent and accompanying instructions to clean the fuel injectors.

- With the fuel injector tester/cleaner still installed on the fuel system. note any significant pressure loss due to injector leakage when the tester pump is turned to Off.

NOTE: The fuel injector has side inject fuel injectors. Therefore they cannot be bench tested. See the following procedure.

- Disconnect the fuel rail from the intake manifold. Leave fuel hoses connected. Jumper the F/P terminal of Data Link Connector (DLC) to ground. Key On. Verify that each injector leakage rate is within specification (1 drop/2 minutes maximum).

- Is the leakage rate for individual injectors within specifications?

YES -- Go to Powertrain Management / Testing and Inspection / Procedures / Diagnostic Routines.

NO -- Replace faulty fuel injectors as required.