28. Fuel System Debris Check
28. FUEL SYSTEM DEBRIS CHECKPurpose:
This test determines if there is debris in the high pressure fuel system requiring the replacement of the entire high pressure fuel system (fuel rails/fuel lines/fuel injectors) when a new high pressure fuel injection pump is installed. To be carried out if the high pressure fuel injection pump did not have a solenoid concern, no electrical concerns and no leaks found.
Fuel System Debris Check
- Carry out the Fuel System Debris Check.
Recommended Procedure:
NOTICE: Do not cut the secondary fuel filter open to determine if there is debris in the fuel system. The purpose of the fuel filter is to collect debris and may be indicating that it is correctly functioning.
- Raise the rear tires of the vehicle 6 to 8 inches.
- Disconnect the cylinder number 1 fuel injector from the jumper tube, connect a rubber hose, crank engine over and drain the fuel through a coffee filter or paint strainer.
- Disconnect the cylinder number 2 fuel injector from the jumper tube, connect a rubber hose, crank engine over and drain the fuel through a coffee filter or paint strainer.
- If there is shiny metallic material in the fuel, install new high pressure fuel system rails, new fuel injectors, a new high pressure fuel injection pump, new high pressure lines and a new fuel cooler. Flush the low pressure fuel return lines until they are free of any contamination.
Possible Causes:
- Water in fuel
- Gasoline
Tools Required:
Coffee filter or paint strainer