bigtex
trial and error
I got a 1988 f-250 with the 6.9 idi. Well the fuel gauge starting waving at me and then went out. I swapped a new sending unit and now the gauge pegs out way past the full mark. Tank is stock and the sending unit was a direct replacement. Whats stumping me is when the unit is out of the tank, it works fine. When it is half way covered in diesel, the gauge pegs out. I've tested the gauge cluster, fuel tank switch, the switching valve and checked for bad grounds and even regrounded the ground wire from the sending unit to the frame. This is a new sending unit and I'm at a loss at what to do next.
Btw, the gauge cluster tested positive continuity to the sending unit.
Any suggestions before I go bat **** crazy?
Btw, the gauge cluster tested positive continuity to the sending unit.
Any suggestions before I go bat **** crazy?