Faulty fuel injectors are one of the most common causes of a Ford Expedition starting slowly. When the injectors are dirty or damaged, they can spray an insufficient amount of fuel into the engine, causing the engine to run lean and stall.
Spark plug issues
Spark plugs are responsible for creating the spark that ignites the fuel in the engine. If the spark plugs are worn or damaged, they can produce a weak spark, which can lead to a slow engine start.
Battery issues
A weak or dead battery can also cause a Ford Expedition to start slowly. When the battery is not able to provide enough voltage, the starter motor will not be able to turn the engine over quickly.
Starter issues
The starter is responsible for turning the engine over. If the starter is damaged or worn, it will not be able to turn the engine over quickly, causing the engine to start slowly.
Engine compression issues
Low compression in the engine can also cause the Ford Expedition to start slowly. Compression is the pressure of the air and fuel in the engine's cylinders. When the compression is low, the engine will not be able to generate enough power to start quickly.
Other possible causes
Other possible causes of a Ford Expedition starting slowly include a faulty ignition switch, a faulty fuel pump, or a faulty camshaft sensor.
