What does it mean when the engine power is reduced?
3 Answers
The reasons for displaying reduced engine power include: 1. Excessive carbon buildup in components such as cylinders, throttle valves, and spark plugs: When there is too much carbon buildup inside the engine, the vehicle's ignition energy decreases, intake efficiency drops, ultimately leading to reduced engine power and symptoms like weak idling. 2. Malfunction in the fuel system: Using an incompatible fuel grade can cause a decrease in the vehicle's output power, resulting in reduced power. Alternatively, if the fuel tank vent is blocked or components like the fuel tank switch, fuel filter, or fuel lines between the tank and carburetor are partially clogged, the required fuel supply cannot be met, leading to overly lean air-fuel mixture and weak engine acceleration. 3. Severe wear of pistons, piston rings, or cylinders: This increases the clearance between pistons, piston rings, and cylinders, reducing sealing effectiveness and causing cylinder head leakage, which lowers cylinder compression pressure. 4. Engine overheating: This leads to poor lubrication, increased mechanical wear, reduced engine power, and higher fuel consumption.
In my many years of repairing cars, power loss is quite common. It could be due to aging spark plugs or excessive carbon buildup, causing poor ignition and affecting power output. Or the fuel filter might be clogged, leading to uneven fuel supply from the injectors. A dirty air filter can also suffocate the engine. Sensor failures, like inaccurate oxygen sensor readings, can cause the ECU to adjust parameters incorrectly. Also, if the ignition coil is burnt out, it directly impacts the engine. I recommend first reading the trouble codes to pinpoint the issue before randomly disassembling parts. When experiencing power loss, driving on highways or climbing hills consumes more fuel and risks breakdowns. Regularly check spark plugs and filters every 20,000 kilometers to prevent minor issues from turning into major repairs.
Last time I was on a business trip, the power suddenly weakened on the highway, which almost scared me to death. After thinking about it for a long time, the reason might be water or impurities in the fuel tank, clogging the fuel line. It could also be insufficient fuel pump pressure, causing improper fuel injection. Sensors like the throttle position sensor might be faulty, leading the ECU to limit output to protect the engine. Driving habits also play a role—for example, I often press the accelerator hard, which burns fuel quickly. Simple self-check: listen for unusual sounds when starting the engine; if there are any, there might be multiple issues. If power drops, don’t stomp on the accelerator to save yourself, as it can easily stall or worsen wear. Take it to a professional shop for diagnosis with proper tools to avoid wasting money.
