Fuel System (Diesel): Water-In-Fuel
- Fuel filter should be drained every 5000 miles or when "WATER-IN-FUEL" warning light glows. Diesel fuel can damage asphalt and painted surfaces. Always place a drain pan under drain hose to collect fuel.
- Stop vehicle and turn engine off. Apply parking brake. Remove fuel tank cap. Open water drain valve 2-3 turns. Start and allow engine to idle for 2 minutes or until clear fuel is observed. Turn engine off and close water drain valve.
- Install fuel tank cap. If "WATER-IN-FUEL" warning light comes on after driving a short distance or if engine runs rough or stalls, a large amount of water may be present in fuel tank. Purge fuel system. See PURGING FUEL SYSTEM in ADJUSTMENTS in this article.