Problem Reports

Delamination of the diesel fuel tank can occur resulting in a loss of power due to debris clogging the fuel filters. In some cases the fuel injection pump and/or fuel injectors have also been damaged. Ford has issued a service bulletin (#19728) addressing this concern. This issue can affect all diesel F-350, F-450, F-550, F-650, and F-750 Super Duty models.

An illuminated Check Engine Light could indicate that one or more of the ignition coils has failed due to excessive spark plug gap. To fix this problem, the ignition coils that have failed, the spark plugs, and all coil boots should be replaced.

Using the correct oil for this engine is critical. Improper engine oil can foam in the high pressure system and not develop enough pressure for operation. Symptoms of this can be hard starting, long cranking time before start, rough engine idle, and a lack of power. Another sign is tiny bubbles in the oil on the engine oil dipstick after the engine is shut off. The additives in the correct oil that protect against foaming can still break down, so changing the oil at the correct intervals is important.

Ford has a manufacturing defect in the assembly of the body panels. The inner fender well and outside body panel area is filled with a solid foam insulation in an effort to avoid metal to metal contact. The foam material retains moisture causing premature failure of the interior wheel arch support as well as the exterior body panel. The repair is costly as it requires the removal of the rusted sheet metal and fabrication and welding in new so...