F 250 2WD Pickup V8-7.3L DSL (1990)
from the fuel filter/fuel heater/water separator manual drain valve as soon as possible to prevent damage to the fuel injection system.
Drain water from the fuel filter/fuel heater/water separator manual drain valve whenever the warning lamp comes on or every 5,000 miles. The WATER
IN FUEL lamp will glow when approximately 3.5 fluid ounces of water accumulates in the separator.
1.
Stop vehicle and shut off engine.
NOTE: To avoid engine stall-out caused by air entering the fuel system, do not drain fuel/water separator while engine is running.
2.
Place an appropriate container under the fuel filter/fuel heater/water separator drain tube to collect drain fluid. The drain tube is attached to the
manual drain valve at base of water separator drain bowl.
3.
Manually open drain valve by unscrewing. Allow drain valve to remain open approximately 15 seconds or until clear (water-free) diesel fuel flows
from drain tube. Close drain valve by threading into water separator drain bowl until liquid no longer drains from drain tube.
WARNING:
Ensure that drain valve is fully and securely closed.
4.
Re-start the engine and check WATER IN FUEL lamp. The lamp should not glow. If it continues to glow, have fuel system checked and repaired.
Drain all traces of water from the fuel filter/fuel heater/water separator as outlined at (5,000 mile) intervals as specified in the maintenance schedule.
Refer to MAINTENANCE SCHEDULE. At this service interval, if the warning lamp is not glowing, examine the draining fluid to determine when
clear diesel fuel flows from the drain tube. Stop draining procedure as soon as clear diesel fuel appears.
