An air charge temperature sensor is a device inside the engine that monitors the temperature of the air going into the engine. In cars made after 1995, this part is called the intake air temperature sensor. The sensor sends temperature data to the car engine's computer for air density estimations used to maintain a proper mixture of air and fuel.Know More
A car's computer needs an intake air temperature sensor to send it data regularly, as different temperatures of air have different density levels. The computer uses the timing of the injector pulses to maintain the proper air-to-fuel ratios at the various densities.
This sensor is most commonly found on the intake manifold with its tip exposed to monitor the air entering the engine. If the engine is designed with a split or separate intake manifolds, there is a sensor for each one.
Due to its location, the intake air temperature sensor can be damaged if the intake manifold backfires. Other factors that damage its functionality include oil and carbon contamination and degradation due to heat and age. In either of those circumstances, the sensor becomes less responsive or ceases to function altogether. Poor electrical connections also prevent data transmission from the sensor to the computer.Learn more about Car Parts & Maintenance
An engine control module is a device that monitors a network of sensors in a car and performs necessary adjustments to the conditions when they are outside of the normal operating range. The module stores a code whenever it encounters a problem, allowing a mechanic to scan it later.Full Answer >
To clean a mass airflow sensor, remove it from the vehicle, submerge it in a plastic freezer bag filled with rubbing alcohol and shake the bag until the sensor is clean. This 30-minute procedure requires a flat head screwdriver, a plastic freezer bag, rubbing alcohol, latex gloves and a towel.Full Answer >
A mechanical temperature gauge uses a Bourdon tube filled with temperature-sensitive liquid to indicate temperature, while an electrical model uses a variable-resistance unit that varies current to the dial as temperatures change. Most modern vehicles use electrical gauges as the mechanical versions are sensitive and expensive to replace.Full Answer >
A bad mass air flow sensor in a vehicle makes starting difficult and affects the performance of the engine because he engine-control unit uses data from the MAF sensor to balance the fuel ratio the injectors deliver to the engine. A bad sensor returns a significantly different temperature than that of the engine coolant when read using a scan tool set to temperature.Full Answer >