8. Disconnect the eight ignition coil electrical connectors.
9. Remove the brake booster bracket and tube.
1. Remove the nut.
2. Release and move the two hose clamps.
3. Remove the brake booster tube.
10. Remove the positive crankcase ventilation (PCV) hose.
For vehicles equipped with 4.6L engine
11. Disconnect the differential pressure feedback exhaust gas recirculation (EGR) connector, then disconnect the upper and lower EGR valve tube fitting.
2001 Expedition/Navigator Workshop Manual
http://www.fordtechservice.dealerconnection.com/pubs/content/~WS1J/~MUS~LEN/20/S