Usually my car warms up soon as i get on the
road..however all of a sudden it warms up slow
and the car only warms up when its stationary...
When I start driving my temperature gage starts
dropping back down to the cold side, car not
overheating or anything could it be a sensor and
not the thermostat
Sounds like the thermostat needs to be replaced.
The thermostat controls the flow of the coolant so it will maintain the engine temperature at about 200 degrees. The temperature sensor indicates the temperature of the coolant, also it sends information to the computer to adjust all the other sensors to make the engine run smoothly.
You might want to try this simple test. When the temp ga. on your dash indicates a normal Op. Temp.......stop the vehicle...get out and open the hood. CARFULLY touch the top RADIATOR HOSE....it should be hot ...hot....hot. Close the hood and continue to drive. When the Temp. Ga. begins to decline and show a colder temp.....get out and go through the same procedure and see what the upper radiator hose feels like. It should feel just warm. What you have just performed is a good test of the Temp.GA. on the dash....and...the TEMP SENDING UNIT responsible for operating the Temp. G. If things check out as described...I would suspect a bad Engine Cooling Thermostat.
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