Will a faulty idle motor cause the car to consume more fuel?

[AllisonFitz]

A faulty idle motor can cause the car to consume more fuel. Function of the idle motor: The idle motor is controlled by the computer and affects the engine's air intake. The air intake impacts the engine's fuel consumption. Additionally, if the idle motor malfunctions or operates abnormally, it can affect the idle speed, potentially causing sudden stalling, which compromises driving safety. The engine's speed at idle is referred to as the idle speed, which can be adjusted by modifying the throttle opening size. Idling essentially means the engine is "running without doing work." When the accelerator pedal is fully released while the engine is running, the engine enters idle mode. During idle speed adjustment, the RPM should not fluctuate abruptly, as this can lead to premature engine wear. It is best to have this adjustment performed by an automotive repair service. Observing unstable idle: From the engine tachometer or by reading data blocks, observe if the RPM fluctuates around the expected idle value or oscillates violently on one side of the expected value. The programmed idle expectations include standard idle values, load idle values (such as when lights are on or the automatic transmission is engaged), and warm-up idle values.