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Home >> Ford >> 2002 >> Taurus SES, 3.0 S >> Repair and Diagnosis >> External Pages >> Different car >> Section 204 (Engine Controls - System & Engine Component Tests - 6.0L (99P F450/550) Diesel) >> Engine Performance Diagnostic Procedures >> Test 11: Electric Fuel Pump Inlet Restriction >> Recommended Procedure

Recommended Procedure

WARNING: This page is about a different car, the 2003 Ford Pickup, 2003 Ford F550 Super Duty, 2003 Ford F450 Super Duty, 2003 Ford Excursion, and 2003 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

Remove the fuel line to the inlet side of the fuel pump. Install Fuel Pump Adapter (310-111) between the fuel inlet line and the electric fuel pump. Connect test adapter to 0-30 in. Hg (0-762 mm Hg) vacuum gauge. Measure restriction at WOT (maximum engine speed out of gear with the brakes set and the wheels blocked). If restriction is greater than 6 in. Hg (152 mm Hg), there is a restriction between the fuel pump and the fuel tank. If restriction is less than 6 in. Hg (152 mm Hg), inspect both fuel filters. If filters are okay, inspect the fuel regulator valve. If regulator is okay, install a new fuel pump.

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