What Causes Lack of Power When the Car is Warm?
2 Answers
The reason for the lack of power when the car is warm is an electronic throttle failure, and it is necessary to promptly visit the car's 4S store or a repair shop to inspect and repair the electronic throttle. Dirty throttle position sensors or voltage imbalances can cause electronic throttle failure, resulting in the situation where the throttle is fully pressed but the speed does not increase. If the fault in the electronic throttle is ruled out, the issue may shift to the engine's intake, fuel system, or ignition system. Any component failure or abnormality in one of these systems could lead to the situation where the car's throttle is fully pressed but the engine speed does not increase. The throttle position sensor signal is part of the intake system. For the engine to work properly, it requires sufficient air. If there is a leak or blockage in the intake system, the car may experience reduced power, inability to increase engine speed, and body shaking when accelerating. The engine's fuel system is also crucial. Using poor-quality gasoline can lead to fuel pump burnout, catalytic converter failure, piston failure, etc., directly affecting engine power and potentially causing engine stalling, inability to accelerate, and other phenomena.
When the car is hot and lacks power, from my experience, there are several main reasons. The engine's air density decreases at high temperatures, leading to incomplete fuel combustion, and insufficient air intake slows down acceleration. Additionally, ignition system components like spark plugs or coils may fail when hot, causing unstable ignition. The fuel pump or injectors may also struggle to maintain pressure in hot weather, leading to poor fuel flow and reduced power. Turbocharged models may experience reduced efficiency due to poor heat dissipation in high temperatures. It is recommended to regularly check the coolant, clean engine carbon deposits, and maintain good heat dissipation. Preheating the car before driving and avoiding prolonged high-speed operation can effectively reduce the risk of power loss when the car is hot. If you encounter this issue, avoid forcing it to run; instead, turn off the engine promptly to cool down before trying again.
