Fuel Gauge - Does Not Read Full

Article No.
95-17-6

08/28/95

GAUGES - FUEL GAUGE DOES NOT READ FULL AND/OR EMPTY - VEHICLES BUILT THROUGH 3/1/95

LINCOLN-MERCURY:
1993-95 MARK VIII

ISSUE:
The fuel gauge and message center may not read full and/or empty when the tank is full or empty on some vehicles. This may be caused by interference between the fuel tank reservoir and the gauge sender float arm due to flexing (maximum 1/2") of the fuel tank and/or the calibration of the message center module.

ACTION:
Replace the fuel tank and sender unit with a revised tank and sender to eliminate the interference or replace the message center module. Refer to the following Service Procedure for details.

SERVICE PROCEDURE

FUEL GAUGE AND MESSAGE CENTER DO NOT READ FULL AND/OR EMPTY

Replace the fuel tank and sender with a new tank (F5LY-9002-A) and sender (F5LY-9275-A). Refer to the appropriate year Mark VIII Service Manual, Section 10-01 for removal and installation procedures.

FUEL GAUGE DOES NOT READ FULL, BUT MESSAGE CENTER DOES READ FULL

1. Perform On-Board Diagnostics. Press "RANGE" and "COMPASS" buttons at the same time, then turn ignition switch to the "RUN" position.

2. Press the "RANGE" switch to advance to the "NVM LEVEL" test.

3. If "NVM" is displayed as "NVM LEVEL 2", replace the message center module with a level 3 module (F5LY-10D898-A). Refer to the appropriate year Mark VIII Service Manual, Section 13-08 for removal and installation procedures. The new module will display "NVM LEVEL 3" during On-Board Diagnostics.

PART NUMBER PART NAME
F5LY-9002-A Fuel Tank
F5LY-9275-A Fuel Tank Sending unit
F5LY-10D898-A Message center Module

OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS: Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage

OPERATION DESCRIPTION TIME
951706A Replace Fuel Tank 1.3 Hrs.
951706B Replace Fuel Tank 0.2 Hr.
Sending Unit
9517060 Replace Message Center 0.5 Hr.
Module

DEALER CODING
CONDITION
BASIC PART NO. CODE
9275 42

OASIS CODES: 204000, 204100, 404000, 607000