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Check Direction Of Flow

WARNING: This page is about a different car, the 1995 Ford RV Cutaway, 1995 Ford Econoline, 1995 Ford Cutaway, and 1995 Ford Club Wagon. However, it is still accessible from the selected car via links, so may be relevant.

Observe direction of flow of bubbles. Bubbles should flow from fuel filter outlet fitting to fuel injection nozzle return system. If bubbles flow in direction described, go to next test for single tank systems. For vehicles with dual tank system, go to CHECK FUEL FILTER/WATER SEPARATOR FOR BUBBLES test. If bubbles do not flow in direction described, fuel system is restricted. Go to FUEL FILTER OUTLET PRESSURE  test under ENGINE PERFORMANCE DIAGNOSIS.

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