Talk:Gen 3 & 4 Erratic Fuel Gauge (Flex Fuel only)

From Taurus Car Club Maintenance and Modification Wiki

Good article.

I discovered the very same problem on the 2000 flex fuel SE that I had. The fuel guage would sometimes go to empty and then return to the correct amount, all while driving the car. I checked wiring from the front of the car to the plug that connects to the fuel pump in the tank and found no problem. I checked the wiring to the guage and found no problem. I even installed a brand new fuel guage and that didn't fix it. While studying the wiring in a Haynes manual I found a small device in the circuit. That device turned out to be the module and when I discovered it behind the radio and bolted to the dash I began to troubleshoot it. Turned out that there wasn't much to check because the electronics are encapsulated with epoxy. Connecting/disconnecting the plug to the module made the guage waiver. I ordered a new module and it fixed the problem. My guess is that a solid state part mounted to a pc board goes bad intermittently.

Mark said:

I had a 2000 flex fuel with the same problem. A Ford manual describes the part as an ac/dc converter that allows the gauge to display properly with the flex fuel sending unit . These instructions are perfect for a 1996 model. On my 2000 the mounting is relocated a little lower down on the drivers side of the radio. The screw is turned around so it can be accessed from reaching behind with no need to remove the radio or the radio trim plastic piece. The application of this part is at least 1996-2001 for salvage searches. May 2010 dealer price here is about 65$ US. If going to a dealer take the part number YF1U-14A069AA since the naming is confused. I think mine calls it a sensor (its not) This is a photo of a nice closeup of the part and the later model mounting:

http://www.taurusclub.com/forum/index.php?showtopic=40573

comes from: http://www.justanswer.com/questions/11jjm-2000-ford-taurus-se-ffv-3-0-65k-has-a-problem-fuel-gauge