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You may have a bad guage. To check, ground out the sender by placing a screwdriver or alligator clips accross the ground tab and the center positive terninal. If the guage works you would normally expect a sender problem, but since you put on a new sender (assuming it's wired correctly [ no offense ]) you will need to trace t the wires from the guage to the SU. The fuel guage power lead is pink ( or at least it is on boats ) Look for a bad connection, corrosion, frayed wires or anything else that looks abnormal. You may want to simply replace the existing wire temporarily with another wire. This new wire should tell you immediately if your guage is bad. Good luck!
you will find the temperature sender unit going to gauge is faulty
will be located somewhere near top of engine on cylinder head or thermostat housing check wire going to it make sure its not earthed or grounded in any way
Hi, sounds like your temperature sender unit is not the correct one, three quarters on any vehicle is too high, i would get it looked at as soon as possible or change it, most sender units have a rating on them so change it to a "cooler" unit
You can test the guage by removing the wire on the engine temp sender and then grounding the wire to a ground. THen turn the ignition to run and the temp guage should go to hot, and when ungrounded the guage will go to cold. The temp sender is a single wire sensor screwed into the intake manifold top left side of engine, with a red/white wire. PLease rate me as this will help me out . Thank you RJ
finder the sender unit on engine normally in cylinder head or thermostat housing a small unit that screws in with a wire on it if ya remove wire and ground it and your gauge go s the way up the sender unit the problem replace
the cable going from the gauge to the sender unit is an earth return. if you take it off the sender unit wire if the gauge does read hot the sender and earth it out the gauge should go to the hot segment.dont leave this cable to earth very long do it quickly. if the gauge does read it is ok, there is no earth to the petrol tank. if it does not read it will be faulty. hope this helps.