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G552275t4 : CHECK FOR WATER IN THE FUEL 1. After thoroughly cleaning around the connections, disconnect the inlet pipe from the fuel filter. 2. Position a suitable clear container beneath the fuel filter inlet pipe to collect fuel. 3. Key on, engine off (the pump should run for a short period, depending on temperature, etc. It may be necessary to turn the ignition on and off more than once to obtain the desired amount of fuel). 4. Collect approximately one liter of fuel. 5. Allow the fuel to stand for at least one minute. 6. Without disturbing the fuel, check for separation of the fuel into layers (a significant amount of water in the fuel will result in a clear separation between the two fluids, with the water being at the bottom). Does the fuel show clear separation? -> Yes DRAIN the fuel tank and refill with fresh fuel. Install a new fuel filter. Fuel Filter - 2.7L Diesel (19.25.02) Test the vehicle for normal operation.
-> No CHECK for other contaminants in the fuel. PINPOINT TEST G552275p4 : CHECK G552275t5 : CHECK THE FLOW OF FUEL THROUGH THE FILTER 1. After thoroughly cleaning around the connections, disconnect the fuel filter outlet pipe to the fuel injection pump. 2. WARNING: During this test, fuel will flow backwards through the fuel filter because of the fuel cooler circuit.
Position a suitable container beneath the fuel filter outlet to collect fuel. 3. Key on, engine off (the pump should run for a short period, depending on temperature, etc). Is there an unrestricted flow of fuel through the filter? -> Yes CHECK for DTCs, check for another cause of customer complaint.
-> No INSTALL a new fuel filter. Fuel Filter - 2.7L Diesel (19.25.02) Test the vehicle for normal operation. |