Here is a bulletin I found:

TSB
00-20-1
HESITATION ON ACCELERATION OR TURNING - LACK OF FUEL PRESSURE - EXPLORER/MOUNTAINEER VEHICLES BUILT THROUGH 8/15/2000 AND EXPEDITION/NAVIGATOR VEHICLES BUILT THROUGH 6/30/2000
Publication Date: SEPTEMBER 21, 2000

FORD:
1997-2000 EXPEDITION
1997-2001 EXPLORER
LINCOLN:
1998-2000 NAVIGATOR
MERCURY:
1997-2001 MOUNTAINEER
ISSUE:

A hesitation on acceleration or while turning may be felt on some vehicles. This may be caused by fuel pump cavitation due to fuel sloshing away from the filter sock in the fuel tank reservoir.

ACTION:

To service, check fuel pressure. Check all fuel pump related electrical circuits. If a fuel pressure concern is verified, refer to the following Service Procedure for details.

SERVICE PROCEDURE

Attempt to verify if fuel pressure drops during the event.
If a fuel pressure drop is verified, check all fuel pump related electrical wiring, connections and related systems.
If all checks OK, replace the fuel pump/sender assembly with a revised fuel pump/sender assembly. Refer to the parts listing for application.
Refer to the appropriate model year Workshop Manual, Section 310-01, for removal and installation instructions.

PART NUMBER PART NAME
F7PZ-9H307-BD Fuel Pump - 1997-1998 Explorer/Mountaineer (All)
XL2Z-9H307-AJ Fuel Pump - 1999-2001 Explorer/Mountaineer (All)
XL1Z-9H307-AB Fuel Pump - 1997-2000 Expedition (4X4)
XL1Z-9H307-BB Fuel Pump - 1997-2000 Expedition (4X2 With Base Suspension)
XL1Z-9H307-CB Fuel Pump - 1997-2000 Expedition (4X2 With Air Suspension)
XL1Z-9H307-DB Fuel Pump - 1998-2000 Navigator (4X4)
XL1Z-9H307-FB Fuel Pump - 1998-2000 Navigator (4X2)
OTHER APPLICABLE ARTICLES:

NONE

WARRANTY STATUS:

Information Only

OASIS CODES:

404000, 609000, 609500, 610000, 610500, 611000, 611500, 614000, 614500