Fuel Injector Cleaning
- Remove fuel injectors. Install injector valves in Holding Fixture (13 6 205). See Fig 1. Connect Harness (13 6 206) to injector valves and to a 12-volt battery. This removes remaining fuel from injector valves. Lay a clean cloth under injector valves to catch remaining fuel. Connect holding fixture to compressed air connection (maximum 44 psi). See Fig 2. Residual fuel is now blown out of injector valves.
- Separate Harness (13 6 206) from injector valves. Install injectors with holding fixture in a container with hot water at 140-176°F (60-80°C). See Fig 3. Regulate air pressure at connection on holding fixture to 44 psi. Note volume of air emerging from injectors. Permitted volume of air emerging from each injector is 2 air bubbles per injector within a 15-minute period. Injectors with a larger amount of air must be cleaned. Remove injectors from water and dry well with compressed air.
- Use Ultrasonic Cleaning Unit (13 6 200) to clean injector valves. Attach injector valves to cleaning unit with holding fixture. Fill cleaning unit with Cleaning Concentrate (13 6 207). See Fig 3. Perform cleaning procedure as specified by manufacturer. Perform leak test on cleaned injector valves. See FUEL INJECTOR LEAKAGE .CAUTION: Do not carry out leak test in cleaning concentrate but rather in a water bath.
- To remove preserving agent, rinse new injector valves with fuel only after about 5 minutes. Install injector valves immediately in engine and run engine. This flushes out any remaining cleaning concentrate, preventing injector valve corrosion. Due to the risk of corrosion, cleaned injector valves cannot be stored.