Temp sending unit 3.9 liter
Recently my temp gauge on my 95 D90 became inoperable...no reading. I ordered a new sending unit,part # PRC2506 and installed it. Started the engine and let it run up. The gauge slowly began reading and climbed steadily to the center of the gauge...but then kept going,right to the edge of the red. The engine was not hot. The gauge wasn't pegged,just stayed at the edge of the red.
Thought the unit might be faulty,checked that it was the right number and obtained a new unit.same story . Climbs right to the red and stabilizes...the engine is not over heating.
It seems like the unit I am installing is not calibrated for my gauge.
Any thoughts or suggestions?