What Causes a Ford to Automatically Shut Off After 30 Minutes of Idling?

[McDallas]

Here are the specific reasons why a Ford may automatically shut off after 30 minutes of idling: 1. Throttle blockage, carbon buildup, or abnormal opening. 2. Carbon buildup or blockage in the fuel injectors. 3. Spark plugs are burned or damaged. 4. Use of low-quality gasoline, leading to fuel pump blockage. 5. Incomplete combustion of the air-fuel mixture in the cylinders. Below is additional information on the effects of prolonged idling on a car: 1. Carbon buildup: If the engine idles for an extended period, the throttle opening is small, and the fuel injectors spray high-concentration fuel to keep the engine running. Therefore, idling itself is more likely to cause carbon buildup than high-speed driving. Prolonged idling leads to severe engine carbon buildup, directly affecting the car's power and comfort. 2. Increased fuel consumption: Idling consumes more fuel. Three minutes of idling is equivalent to the fuel consumption of driving one kilometer. 3. Shortened engine lifespan: When the engine idles, the lower temperature and pressure in the cylinders prolong the fuel ignition time. Combined with reduced cylinder sealing, this can easily cause knocking sounds, shortening the engine's lifespan. 4. Damage to the catalytic converter: Prolonged idling results in a high concentration of the air-fuel mixture in the engine, with low oxygen content in the exhaust. The unburned mixture combusts at the catalytic converter's location, potentially damaging it.