What Causes Poor Acceleration and High Fuel Consumption in Cars?

[FaithFitz]

Poor acceleration and high fuel consumption in cars can be caused by issues such as malfunctioning ignition systems, fuel system failures, or clogged catalytic converters. Below are detailed explanations: Malfunctioning Ignition System: For example, aging ignition coils or spark plugs that haven't been replaced for a long time can lead to insufficient ignition energy, poor combustion, weak engine acceleration, and the illumination of the engine warning light. Replacing ignition system components can resolve the issue. Fuel System Failure: Fuel system failures can result in low pressure and insufficient fuel injection, leading to weak engine acceleration. It is necessary to inspect and replace the fuel filter and fuel pump. Clogged Catalytic Converter: If the vehicle uses low-quality fuel, it can affect the lifespan of the exhaust system's catalytic converter. Once the catalytic converter becomes clogged, the car will experience poor acceleration and increased fuel consumption. Checking whether the catalytic converter is functioning properly and cleaning it can restore normal operation.