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How the car warm-up routine began The winter warm-up routine started decades ago when vehicles were more prone to stalling in frigid temperatures, according to Carfax.
What you can do. Experts say there are a few things to keep in mind when it comes to idling. If it's not overly hot or cold, the DOE says it's best to shut off your car if you plan to be sitting ...
Modern engines are designed to warm up quickly and efficiently, reducing the need for prolonged idling. “Once fuel-injected engines came along, this practice was no longer necessary,” explains ...
Idle speed, sometimes simply called "idle", is the rotational speed an engine runs at when the engine is idling, that is when the engine is uncoupled from the drivetrain and the throttle pedal is not depressed.
Idle reduction describes technologies and practices that minimize the amount of time drivers idle their engines. Avoiding idling time has a multitude of benefits including: savings in fuel and maintenance costs, extending vehicle life, and reducing damaging emissions.
Directing water to circulate only through the engine allows the engine to reach optimum operating temperature as quickly as possible whilst avoiding localized "hot spots." Once the coolant reaches the thermostat's activation temperature, it opens, allowing water to flow through the radiator to prevent the temperature from rising higher.
Letting a car idle requires more time for the vehicle to warm up and allows excess fuel to get into the engine, which isn't good for wear and tear.
These vehicles have a MAF sensor, Air Temperature sensor, and when equipped with the 2.3L 4-cylinder, two spark-plugs per cylinder. This combination ensures the air is just warm enough to vaporize the droplets and does very noticeably improve performance and emissions at the same time in cold, northern winter weather. [citation needed]