The coolant temperature sending units are near the thermostat housing. The small one is for your temperature guage, the larger one is for the EEC system.
Under hood, center, front engine area, mounted on front top of engine near water outlet
The engine coolant temperature sensor and coolant temperature gauge sender are located on the passenger's side of the engine, under the intake manifold.
Your 1993 Honda Accord can use any SAE certified coolant. The coolant should have a temperature range of -25 degrees Fahrenheit to 120 degrees Fahrenheit.
Ground the wire that goes to the temperature sending unit and if the gauge goes up then the sending unit is defective.
It is in the fuel tank, along with the sending unit/float assembly
It is on the cylinder head near the thermostat housing.
its screwed in on the front of the water pump
Under the hood on the driver's side next to the washer fluid and engine coolant container.
on the front of the intake on left side when standing in front of truck.
Can be a defective temperature sending unit. If you just chance the coolant can be air trapped in the cooling system. You would need to bleed all air from the system. Can also be a defective gauge, but highly unlikely.
Bad gauge, bad sending unit, bad wiring.
it's on the intake manifold.