You will need a hair drier and ohmmeter for the testing portion of this process. Since colder air is denser than hot air cold air requires more fuel to maintain equal airfuel ratio.
Standard Ax69 Air Charge Temperature Sensor
Let the engine cool before doing this as you can be severely burned.
Air charge temperature sensor. This increases the risk of detonation and lean misfire which hurts fuel economy and increases emissions. A faulty air temperature sensor that is reading colder than normal will typically cause a rich fuel condition. The air charge temperature sensor sends a signal to the computer during cold conditions that allow the computer to provide additional fuel required during cold starts.
The major function of the air charge temperature sensor also called intake air temperature sensor iat monitors the temperature of the air gaining access to the engine. It should be 100f above or below the ambient temperature of the vehicle. Equip cars trucks suvs with air charge temperature sensor from autozone.
As the temperature increases the resistance is reduced which reduces the voltage at the sensor. This sensor is used to measure the temperature of the air entering into your engine. The pcm changes the airfuel proportion by changing the length of time of the injector pulses.
Air charge temperature sensor. The signals from the air charge temperature sensor and the map sensor are used to monitor both the temperature and pressure of the air entering the combustion chamber. If this is not the case you may have a problem with the sensor.
By bob oneill and bob lincoln. This information is required by the engine computer to evaluate air density for the sole purpose of balancing airfuel mixture. The ntk air charge temperature sensor is a premium quality replacement sensor for your vehicle.
A faulty air temperature sensor that is reading warmer than normal will typically cause in a lean fuel condition. After turning it on check for the temperature of the iat sensor. This information is used by the ecu to calculate fuel delivery.
The control unit evaluates these voltage values since they are directly related to the intake air temperature low temperatures result in high voltage values at the sensor and high temperatures result in low voltage values. A change in the reading indicates a bad connector which then has to be replaced. We know our parts and products.
This wastes fuel and also increases emissions. A failing or defective sensor will not be able to send the correct signal to the ecu engine control unit which can result in increased difficulty when cold starting a vehicle. Shake the iat sensor connection to the mass air flow sensor and check to see if there is any difference in reading.
Allow the sensor to cool before further testing. Remove the air intake temperature sensor after first removing the air intake housing. The air charge temperature sensor sends a signal to the computer during cold conditions that allow the computer to provide additional fuel required during cold starts.
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