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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 12: Fuel Aeration Test >> 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.
  1. Remove the fuel return line at fuel control module.
  2. Attach a 1/4-inch diameter hose (clear) to the fuel pump module and place the other end of the hose into a suitable container.
  3. Turn the ignition on. The fuel pump will cycle on, then off. Diesel fuel may not flow out through the attached hose after only one key cycle. Repeat the key cycle until fuel flows from the attached hose.
  4. Start the engine.
  5. Run at WOT for 2 minutes. Return fuel should be free of bubbles.
  6. If the fuel has air in it, the fuel returning to the tank will appear white, foamy or non-transparent. If no or very little air is present in the fuel, the fuel will appear clear/transparent.
  7. If air is present in the return fuel, inspect the fuel system for leaks.
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