What are the reasons for feeling a complete lack of power when the car is warmed up?
2 Answers
The reasons for feeling a complete lack of power when the car is warmed up are: 1. There is a fault in the ignition system, such as aging ignition coils or spark plugs that have not been replaced for a long time, leading to insufficient ignition energy and poor combustion, which causes the engine to accelerate weakly; 2. A fault in the fuel system causes excessively low pressure and insufficient fuel injection, resulting in weak engine acceleration; 3. Excessive carbon buildup in the engine leads to poor fuel atomization, causing poor combustion of the air-fuel mixture, exceeding exhaust emission standards, and resulting in weak engine acceleration; 4. A fault in the engine system causes the engine to enter an emergency operation mode, limiting the engine's power output and causing weak acceleration; 5. Damage to the catalytic converter or turbocharger. In such cases, it is necessary to visit a repair facility to diagnose the relevant fault codes using a computer and troubleshoot based on the fault codes.
My friend's old Lavida had the same issue before. When climbing uphill with a hot engine, it wouldn't pick up speed even with the accelerator floored. I reckon it's mostly a cooling problem—when the engine bay overheats, it's like a person with fever feeling sluggish. If the intake air temperature sensor is dirty or faulty, the ECU still thinks it's sucking in cool air, resulting in insufficient fuel supply. No wonder it feels powerless. A radiator clogged with willow catkins or low coolant level can also trigger overheating protection. And spark plugs caked with carbon deposits produce weak sparks that can't burn gasoline efficiently, especially those unchanged for 50,000-60,000 km. Last time I cleaned the throttle body myself—once the airflow smoothed out, the power came back even in high temperatures.
