What are the main reasons for the deterioration of car power performance?
3 Answers
Main reasons for the deterioration of car power performance: 1. Engine failure; 2. Lack of regular maintenance leading to aging of components; 3. Use of poor-quality gasoline during refueling, resulting in reduced power; 4. Blockage of the fuel tank vent hole, fuel tank switch, fuel filter, or fuel lines between the tank and carburetor, preventing adequate fuel supply; 5. Incorrect ignition timing, causing premature ignition of the air-fuel mixture and knocking. Car power performance refers to the average driving speed achievable by a car moving straight on a good road surface, determined by the longitudinal external forces acting on the car.
When my car's power dropped, it was really frustrating. Pressing the accelerator had no response, acceleration felt sluggish, and climbing hills became more difficult. The reasons are mostly engine-related issues, such as the ignition system: worn spark plugs causing weak ignition and incomplete combustion; fuel system: clogged fuel injectors leading to insufficient fuel supply or an aging fuel pump, making it hard to get fuel during acceleration; incorrect valve clearance or worn piston rings, lowering the compression ratio and reducing power. Another common issue: a blocked intake system, a dirty air filter unable to draw enough air, or poor exhaust flow, a clogged catalytic converter restricting exhaust. Carbon buildup on the piston tops also affects efficiency. Additionally, deteriorated transmission fluid or slight brake drag can sap power. Regular maintenance is recommended: check the filters, clean carbon deposits from the throttle body, replace spark plugs, and older cars especially need frequent upkeep.
Having handled numerous cases of reduced power, the key points lie in several areas: Ignition faults are the most common, with aging spark plugs or ignition coils leading to poor combustion efficiency; fuel system issues such as clogged fuel lines or insufficient pump pressure; obstructed intake and exhaust: carbon buildup in the intake manifold reduces air volume, and a clogged catalytic converter increases backpressure, stifling horsepower. It could also be a drop in cylinder compression ratio due to piston ring leakage; control issues like failed sensors or inaccurate ECU fuel adjustments. Transmission clutch slippage causes power loss, or brake drag increases resistance. It's recommended to first use an OBD diagnostic tool to check for fault codes, replace filters, clean carbon deposits, inspect fuel pressure, and ensure smooth gear shifts. Address minor repairs promptly to prevent major issues.
