: First have always a #10 and 14 wrench. Take the distributor out and have a towel or rag to clean some oil drips. Place it aside and just beneath you will see the sending unit. Sometimes it is just a matter of replacing but the gauges can be already fatigue. However the sending unit is your cheapest beginning. be careful with the plug when disconnecting.
hondahookup.com has manuals
underneath the distributor
The temp sending unit may be shorted to ground. Unplug the sending unit to see if the gauge drops to cold. If it does, you have a faulty temp sending unit.
The 2.2L or the 4.3L engine?
The 4.2 or the 5.3 engine?
The temp sending unit should be found close to the thermostat housing. It will have a single wire attached to it.
The 95 Lumina with a 3.1 engine does not have a temperature sending unit. Instead, the dash temp gauge is controlled by the engine coolant temp sensor. This sensor is located on the driver's side, top of the engine.
THE temp sending unit 4 the inside gauge usally has 1 wire & the sending unit 4 the Computer has 2 wires.
If it starts good when the engine is cold but starts hard when engine is warm and hesitates, check or change the water temp sending unit. Hope this helps.
If the wiring and connections at the coolant temp sending unit check okay start with replacing the coolant temp sending unit. Temp sending unit should be less than $20.
The temp sending unit for the temp gauge is located on the drivers side of the engine between cylinders 3 and 5 spark plugs.
it sends the engine temp to the computer tells if it is hot or cold ....
The temp sending unit on the engine could be unplugged or faulty.