Atmospheric pressure sensors are fitted at the engine air inlet to measure the air pressure that affects engine calibration. They are connected to a computer that reads the signal from the pressure sensor to regulate fue... More » Vehicles Car Parts & Maintenance Engine

Air pressure is caused by the weight of the air pressing down on the Earth, the ocean and the air below. Air pressure is also known as atmospheric pressure and barometric pressure. More » Science Earth Science

Humidity lowers air pressure by displacing nitrogen and oxygen molecules with lighter water molecules. Differences in humidity can cause storms to form. Humid air also presents challenges to pilots. More »

A rotary vane vacuum pump works by using centrifugal force to turn blades against the circular surface of a cylinder whereby pockets of air are pushed from an inlet port to an outlet port as air pressure increases. Air p... More »

An engine stumbles during acceleration if it has a fouled spark plug, a vacuum leak, or a blocked airflow meter or airflow sensor. A mechanic has to conduct comprehensive tests to find the cause of the stumbling and to a... More »

Some possible reasons that a car stalls include a defective airflow sensor, an engine vacuum leak or a faulty coolant sensor. Other potential reasons a car stalls include a defective speed control system or low engine co... More »

Some manufacturer specific Chevy check engine codes are P0342 camshaft position sensor A bank 1 low input, P1105 secondary vacuum sensor circuit, P1106 MAP sensor circuit intermittent high voltage, P1107 MAP sensor circu... More » Vehicles Car Parts & Maintenance Engine