* Faulty fuel injector. A faulty fuel injector can cause the engine to run lean (too little fuel), which can also lead to a loss of power.
* Spark plug problems. Worn or damaged spark plugs can cause the engine to misfire, which can lead to a loss of power.
* Ignition coil problems. A faulty ignition coil can also cause the engine to misfire, leading to a loss of power.
* Vacuum leaks. Vacuum leaks can cause the engine to run lean, which can also lead to a loss of power.
* Turbocharger or supercharger problems. A faulty turbocharger or supercharger can cause the engine to lose boost pressure, which can also lead to a loss of power.
* Transmission problems. A slipping transmission can also cause the engine to lose power, as it prevents the engine from effectively transferring its power to the wheels.