What is the fault when the car cannot accelerate?
3 Answers
First, it is necessary to increase engine power by checking components such as spark plugs, fuel injectors, and the intake system. Next, inspect the transmission system, particularly the clutch plate. Finally, examine the braking system for any abnormal braking phenomena. Below are specific checks for the inability to accelerate: 1. If the issue occurs as temperatures rise, it is likely caused by insufficient air intake leading to incomplete fuel combustion in the cylinders. The air filter might be slightly clogged. Another possibility is the use of 90-octane fuel. While 90 and 93-octane fuels produce similar energy, 93-octane has a higher ignition point. 2. Other potential causes include not cleaning the throttle body, fuel injectors, and catalytic converter for an extended period. The recommended cleaning interval is approximately 20,000 kilometers. Additionally, check if the high-voltage wires are functioning properly and if there are any misfires, which could lead to poor performance in a single cylinder. Furthermore, inspect the clutch for slippage. Clutch slippage can result in partial loss of engine output power, and in severe cases, the car may not move after engaging a gear.
I've been in auto repair for several years, and most cases of poor acceleration are due to engine issues. The most common problems are in the fuel system, such as a worn-out fuel pump not supplying enough fuel or a clogged filter blocking the fuel line, starving the engine of power. Ignition problems are also frequent, like weak sparks from aging spark plugs or leaking ignition coils causing incomplete combustion. In the intake system, excessive carbon buildup in the throttle body or a dirty air filter can restrict airflow and limit power. On the transmission side, a slipping clutch in manual transmissions or dirty transmission fluid preventing gear shifts in automatics can also hinder performance. I recommend starting with simple checks: replace the air filter and clean the fuel injectors. If symptoms appear, don't push the vehicle; stop immediately and seek a professional shop—safety first, no risks or delays. Regular maintenance like frequent oil and filter changes can prevent major repairs.
Last time I was driving, I experienced a lack of power when accelerating. Pressing the gas pedal felt like the car was crawling like a snail, which really made me nervous. It turned out to be a faulty throttle pedal position sensor sending incorrect signals, causing the ECU to limit acceleration to protect the engine. Sometimes, poor combustion can occur due to water or excessive impurities in the gasoline, or the exhaust catalytic converter might be clogged, preventing proper exhaust flow. If the idle is unstable and acceleration is sluggish, it could mean one of the cylinders isn’t firing. Emergency measures: Pull over safely, turn on hazard lights, shut off the engine, and restart—this might reset the system. For daily maintenance: Use high-quality fuel and avoid cheap options; regularly inspect wiring harnesses to prevent loosening. Acceleration issues are dangerous, especially during emergency braking or uphill driving, as they can lead to loss of control. Drive cautiously and address problems promptly—don’t delay.
