Mechanics

FUEL GAUGE

1997 Ford Taurus

Electrical problem
1997 Ford Taurus 6 cyl Front Wheel Drive Automatic

the fuel gauges is reading wrong. What could the problem be?
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Woodpusher420
September 24, 2008.




TSB
FUEL GAUGE DOES NOT READ FULL/READS FULL TOO LONG -1997 Ford Taur.
FUEL GAUGE DOES NOT READ FULL/READS FULL TOO LONG
TECHNICAL SERVICE BULLETIN
Reference Number(s): 99-2-6, Date of Issue: February 8, 1999 Related Ref Number(s): 99-2-6
ARTICLE BEGINNING
CONDITIONS
FUEL GAUGE - DOES NOT INDICATE FULL - SERVICE TIP
FUEL GAUGE - FLUCTUATES AT 1/4 TANK OR BELOW WHILE DRIVING - SERVICE TIP
FUEL GAUGE - INDICATES FULL TOO LONG - SERVICE TIP
APPLICATION
Model(s): Ford: 1996-98 Taurus
Lincoln-Mercury: 1996-98 Sable
Bulletin No: 99-2-6
Date: February 8, 1999
ISSUE
The following may be fuel gauge/tank concerns: ? 1) Overfilling fuel tank/fuel gauge stays on full too long/tank holds more fuel than the rated capacity. With different fuel nozzles, filling angles and filling methods, it is possible to add more fuel than the advertised tank capacity.
? 2) Fuel gauge will not read full though the tank is full. Incorrect fuel sender installed/fuel gauge inoperative/fuel tank not filling properly.
? 3) Fuel gauge fluctuates at 1/4 tank and below while driving. Dynamic movement of fuel in tank causes gauge fluctuation during vehicle maneuvers.
ACTION
Discuss with customer or perform the following for the listed concerns: ? 1) Inform customer to use the 3-click fill method described in the Owner's Guide. Do not continue to add fuel after the third automatic shutoff of the pump. For this issue, the fuel sender and gauge must not be replaced. Also, when the gauge is indicating at or near the " E" gradient, there could be 7.5-11 L (2-3 gallons) of fuel remaining in the tank.
FUEL GAUGE DOES NOT READ FULL/READS FULL TOO LONG -1997 Ford Taur.
? 2) Fill vehicle with fuel using 3-click method described in Owner's Guide. With vehicle on level ground, disconnect C496 and check resistance on tank side of Circuit 29 (Y/W) and Circuit 398 (BK/Y). If resistance is 155-162 ohms, tank/fuel sender is acceptable. Check forward (in the circuit) to gauge (refer to the appropriate year Taurus/Sable Service Manual, Section 13-01, Pinpoint Test C, Group 13). If sender resistance is lower, check for proper fuel sender part installed. Inspect vapor lines on top of tank for any possible restricted/crushed lines. If no problems to the lines are evident, check carbon canister, canister vent valve, and canister vent hose for restrictions.
? 3) Inform customer that gauge movement up to 1/8 tank fluctuation is normal when driving with fuel level 1/4 tank or below. Do not replace fuel sender or gauge.
NOTE: Do not bend float rods on fuel sender in an attempt to service this or any other fuel indication issue. Also note when checking fuel sender operation (action section issue #2), empty stop sender resistance is 15 ohms and full stop resistance is 160 ohms unlike fuel gauge test resistance points of 22 ohms empty, 145 ohms full.

BMRFIXIT
Sep 24, 2008.


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