Inspecting for Fuel Contaminants

WARNING: This page is about a different variant/trim than selected.

Test the fuel specific gravity and record the results. Refer to Fuel Specific Gravity Testing
Remove the fuel filter and inspect the inside area of the fuel filter for dirt, water deposits or other debris.
Drain the fuel filter into an approved clear container and allow the contents to settle. Observe the container for contaminant separation.
Remove the water-in-fuel sensor from the bottom of the fuel filter and inspect inside the filter for rust deposits, dirt or other debris.
If contaminants are present in the fuel or in any of the inspected areas, remove the fuel lines to the injectors and inspect the fuel injector return outlets and feed inlets for rust or corrosion.
NOTE: The presence of water or gasoline in diesel fuel may also cause damage to other fuel system components.

Replace the fuel injectors if rust or corrosion is present. Refer to Fuel Injector Replacement and Fuel System Cleaning .
If rust or corrosion was not present in the injectors, but contaminated fuel was present, refer to Fuel System Cleaning and attempt to start and run the engine after procedure is completed.
If rust, corrosion or water is present, test the Water in Fuel Sensor for proper operation. Refer to Water-in-Fuel Lamp Diagnosis