What is the situation when the engine cannot accelerate?

[JessicaFitz]

Engine cannot accelerate due to the following reasons: 1. Fuel line blockage. First check whether the fuel filter is blocked, whether the fuel pump pressure is sufficient, and whether the fuel injector is blocked. 2. Exhaust system blockage. Check whether the three-way catalytic converter and the entire exhaust pipe are blocked. 3. It may be due to excessive carbon deposits on the throttle, idle position sensor, or damage to the air flow meter. 4. Additional information: When driving, do not use the semi-engaged clutch. In special cases where semi-engagement is required, try to shorten the semi-engagement time as much as possible to prevent burning the clutch friction plates.

[MacCorey]

I've been driving for many years and have encountered several instances where the throttle wouldn't respond. That time on the highway was particularly dangerous. When the engine doesn't respond to pressing the gas pedal, it's mostly due to fuel system issues, such as a faulty fuel pump causing insufficient fuel supply or clogged fuel injectors preventing gasoline from spraying. The ignition system is also a common culprit, with aging spark plugs or faulty ignition coils causing the cylinders to misfire. The air supply system can be problematic too; a dirty air filter can block the intake, making the car struggle to breathe. These are all common causes. If not repaired promptly, not only does fuel consumption skyrocket, but engine components can also be damaged, and the risk of breaking down on the highway becomes very real. I recommend not delaying and taking the car to a professional shop immediately to check the fuel pressure gauge and ignition status. Replacing worn parts will restore smooth operation. Regular maintenance, like cleaning the air filter, is essential to prevent small issues from turning into big problems.

[LaAdaline]

As a daily-driving family user, it's really frustrating when the throttle doesn't respond. Common causes include a faulty throttle position sensor or an air leak in the intake system, which can cause the computer to misinterpret throttle commands. It could also be due to low fuel pressure from a leaking fuel pump or high-pressure fuel line, or a faulty ignition coil affecting ignition efficiency. Not addressing the issue promptly can lead to increased fuel consumption, excessive emissions, and long-term damage to the catalytic converter. I once experienced this in city traffic and had to slowly crawl to the repair shop. It's advisable to regularly check sensors and fuel lines, clean the throttle body to maintain smooth operation, and avoid similar embarrassing situations. Safety first—don't wait until the problem worsens to take action.

[VanJuniper]

This type of malfunction is frequently encountered in repair work. Engine power loss during acceleration may stem from ignition issues, such as spark plug carbon buildup or aging coils causing ignition failure, leading to incomplete cylinder combustion. The fuel system poses significant risks—clogged injectors or failing fuel pumps result in unstable fuel supply. Faulty sensors, like oxygen sensors, disrupt fuel mixture control. These issues can cause sluggish acceleration and even stalling risks. Early diagnosis and timely replacement of components save money and hassle, ensuring long-term vehicle maintenance.