[williamoss]

Last October I installed a new fuel sending uit as my guage was stuck at 1/4 tank and would not move up or down. The installation was simple as all one had to do was slip off the electrical connector loosen the ring and remove the old unit. The installation was the reverse but also included installing a new gasket. In 10 minutes the job was done and the guage worked again. Yippee that was easy. Unortunatly onece again my guage reads 1/4 tank as it is stuck here again. Could it be a bad sending unit or could my guage on the dash gone bad? I hope not as the guage is $400 plus installation cost requiring taking the dash apart. If it turns out that the guage is defective are there any other parts needed as the dash will be apart?

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[banditsc]

You could take the sending unit out of the tank, hook the wire up to it and slide the float up and down to see if the gauge moves up and down. Taking the instrument cluster out only takes like 15 minutes, it's possible there is a loose or corroded connection there.

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[MB968]

I like the idea of taking the unit out of the tank. Rotate it end for end and it should go from full to empty. If it does not, check to see if it looks OK. When I repaired your old sender I found that the top of the aluminum cylinder was badly deformed at the top so the overall length was about 3/8" shorter than it should be. It also had one of the two rods that the float moves up and down on that was bent not allowing the float to go all the way to the bottom. Looked to me like the bent rod and the deformed top piece were connected problems. Could there something in your tank that smashes up against the bottom of the sender when installed and deforms it so it won't allow the float to go always to the bottom of the travel? Probably not your issue, but you unit was deformed from something either in the tank, or someone had overtightened the nuts on the bottom of the sender.



If the sender unit looks good, and when you flip it end for end the gauge doesn't go from full to empty, then you should look to the gauge.

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[williamoss]

funny thing was when i installed the 2nd unit ( the new one ) it just droped into the tank. and did not feel as if it hit bottom. Then all I did was tighten the nut on top, which also went in smooth and connected the electrical. It then immediatley went to full and worked fine for 4 months. Now it is stuck once again at 1/4.

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