water temp gauge and sender

• 2022-09-29

Automobile water temperature gauge and sender need to be used together. Different water temperature sensors have different resistance values. Not matched. Although the sensor normally sends the signal, if the signal value is different from the standard signal of the original vehicle, the water temperature identified by the computer is inaccurate! Many systems will be affected successively (such as fuel injection system and cooling system) .

If the water temp sender sensor is broken, it will affect the fuel injection during cold start, which will make it difficult to start the car, or even impossible to start. Today's cars basically have their own emergency system. If the water temperature sensor fails, the fuel injection volume of the car will be limited. If the water temperature is too high, the engine will be pulled and the engine will be overhauled. Therefore, if the car breaks down, it must be replaced instead of relying on the emergency system.

The ECU measures the temperature of engine cooling water according to this change. The lower the temperature, the greater the resistance; On the contrary, the resistance is smaller. The ECU measures the temperature of engine cooling water according to this change, which is used as the correction number of fuel injection and ignition timing. To put it simply, we can know the running state of the car, stop or move, or how long it takes to move through the temperature of the engine water temperature.

The water temperature sender allows the instrument panel thermometer to display the engine operating temperature, and the power injection system ECU corrects the fuel injection quantity (air fuel ratio).

The engine doesn't work well at the working temperature (it is also an accident). Especially after high speed, the engine can be started after a while. It doesn't work well. Start hard for a long time, the car can start. There is no other strange feeling during the driving process. Occasionally, when shifting gears, I feel very frustrated. I think there is a problem with the clutch. The water temperature gauge indicates abnormally and swings back and forth; In the winter morning, the pointer will respond after starting a short time (previously, it was about 20 degrees below zero outside, and it took 10 minutes to reach the engine operating temperature). Fuel consumption increased significantly. If so , need to change a new water temp gauge sender .