Diagnostic Aids

WARNING: This page does not describe the selected car, but rather 16 other vehicles, including the 1996 Ford RV Cutaway, 1996 Ford Pickup, 1996 Ford F-Super Duty, 1996 Ford Econoline, and 1996 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

Purpose of this test is to see if fuel system is getting sufficient clean fuel for engine to operate properly. Cloudy fuel indicates fuel may not be a suitable grade for cold temperatures. Excessive water or contaminants may indicate fuel system and tank may need to be flushed.

Connect a hose to fuel drain line at bottom of fuel filter. Place other end of hose into a suitable container. Open fuel drain. Start engine and observe fuel. Fuel flow should be a steady stream. Turn ignition off.
Turn ignition on. Check WATER IN FUEL warning light indicator. If warning light is on, fuel is contaminated with water. Service fuel system as necessary. If engine oil is present in fuel, injector "O" ring maybe defective. Perform INJECTION CONTROL PRESSURE TEST . Repair oil leaks as necessary.

NOTE: Some sediment and water may be present in fuel sample if fuel filter has not been serviced for a prolonged period of time. A second sample may be necessary to determine fuel quality.