What is the problem when the car cannot accelerate?
2 Answers
From the perspective of the fuel supply system: The power for car acceleration comes from the engine, which operates by being driven by fuel. If there is an issue with the fuel supply system, the vehicle speed cannot increase normally during acceleration. From the perspective of engine carbon deposits: After prolonged use, cars will accumulate carbon deposits, which can severely affect engine power. From the perspective of engine intake and exhaust: When the air filter and catalytic converter are blocked, it can also seriously impact engine power. During intake, if the engine cannot absorb enough air to mix the fuel-air mixture properly, it will result in an overly rich mixture, affecting engine power. Additionally, if exhaust is not smooth, the exhaust gases that should be expelled may flow back into the combustion chamber, affecting the combustion of the mixture.
I encountered a lack of power during acceleration when driving my family's old car, especially when overtaking on the highway. First, I checked the air filter and found it heavily clogged with dust, but replacing it didn't help much. Later, a fuel system inspection revealed that the fuel filter was blocked, causing insufficient fuel supply—this part tends to cause such issues if not replaced regularly. It could also be due to worn spark plugs or faulty ignition coils affecting ignition efficiency. Low tire pressure or dragging brakes can also make the car sluggish. That time, I spent over 200 yuan replacing the fuel filter to fix the issue. Regular maintenance really shouldn’t be skipped, especially for older cars—paying attention to these areas can prevent breakdowns and avoid trouble on the road.
