2011 Ford F350 Super Duty Crew Cab Diesel Supplement 5th Printing - Page 39
2011 Ford F350 Super Duty Crew Cab Manual
Page 39 highlights
Maintenance and Specifications LOW FUEL PRESSURE MESSAGE The engine is equipped with a low fuel pressure detection system. If the message center displays: LOW FUEL PRESSURE the following explains why and what to do: • Cold start or cold operation (below 32°F (0°C): If this message appears during a cold start or during cold operation up to 10 minutes after the initial cold start, monitor the message center. If it disappears and does not re-appear after the engine has fully warmed up, the low fuel pressure message is most likely caused by waxed or gelled fuel. Do not use alcohol based additives to correct fuel gelling. This may result in damage to the fuel injectors/systems. Use an anti-gel additive as listed in Maintenance product specifications and capacities section in this chapter. The customer warranty may be void from using additives that do not meet or exceed Ford specifications. If the low fuel pressure message persistently appears after re-fueling during the cold start and cold operation conditions defined previously and then disappear when the engine has fully warmed up, consider different fuel sources. • Low fuel operation: If the message appears when the vehicle is warm and during low fuel tank level operation, i.e. the tank level is at or very near empty, refuel the vehicle and operate the vehicle. If the message reappears after fueling, see below. If the message does not come back, the low fuel pressure condition was due to low fuel levels in the fuel tank. • Normal operation: If the message appears during normal operation when the vehicle / engine is fully warm, and fuel level is not low, the fuel filters must be changed regardless of the maintenance schedule interval. • If replacement of the fuel filter does not remedy the low fuel pressure message during normal operation as defined above, take the vehicle to your authorized dealer. CHANGING THE ENGINE-MOUNTED AND DFCM FUEL FILTERS Your vehicle is equipped with two fuel filters; one is mounted on top of the driver's side of the engine and the second filter, inside the DFCM, is mounted on the frame rail under the driver-side floorboard near the transmission. Both filters should be replaced at the same time. Regular fuel filter changes are an important part of engine maintenance; failing to keep with the scheduled maintenance could lead to engine performance issues and/or fuel injection system damage. Refer to the scheduled maintenance information of this supplement for more information. 39 2011 Diesel (eco) Supplement, 5th Printing USA (fus)