What is the reason why Dongfeng Fengshen AX7 cannot accelerate when stepping on the throttle?

[VanKeira]

Reasons why Dongfeng Fengshen AX7 cannot accelerate when stepping on the throttle: 1. Clutch problem: If the engine speed increases when stepping on the throttle but the car does not move, it indicates a clutch issue. 2. Throttle cable problem: If the engine speed does not increase when stepping on the throttle, it means no fuel is being injected, which could be due to a fuel supply system issue or a throttle cable problem. 3. Intake system problem: When experiencing acceleration weakness, check if the intake system is intact. If it is, consider whether the intake system needs cleaning. Below are extended details on related content: 1. Power: Power is primarily generated by the intake system, fuel supply system, and related electronic circuits and components. Therefore, when acceleration is weak, these three areas should be checked to determine if they are affecting acceleration performance. 2. Avoid excessive throttle: Excessive throttle input only reduces driving time by 4%, but increases fuel consumption by 37%-40%. On typical city roads, the speed is usually maintained at 50 km/h, with engine speed around 2000-2500 rpm. On highways, speeds are generally between 90-110 km/h, and for every 10 km/h increase in speed, fuel consumption increases by 10%.

[DiSavannah]

Oh, I've also encountered the issue where the Dongfeng Fengshen AX7 doesn't move when stepping on the accelerator. The most common reason might be a problem with the fuel system, such as a faulty fuel pump or clogged fuel injector, preventing fuel from reaching the engine—no matter how hard you press the accelerator. Another possibility is the ignition system; if the spark plugs are severely worn or fail to ignite, the car will struggle to move. Additionally, faulty electronic components like the mass airflow sensor or throttle position sensor can mislead the ECU into not providing adequate throttle response. Last time my car had this issue, I first checked if the fuel filter was dirty—just pull it out for a simple inspection. If that doesn't work, don't force it; take it to a professional repair shop. Safety first! Regular oil changes and maintenance can help prevent such problems.

[VonWillow]

As a long-time car repairer, I suspect the issue with the AX7 is mostly in the electronic system. The throttle position sensor is prone to failure—it controls throttle response, and inaccurate signals can make the accelerator ineffective. If there are error codes in the ECU, the car may enter a speed-limiting protection mode. Next is the fuel system; for example, clogged fuel injectors or insufficient fuel pressure can prevent fuel from entering the engine, resulting in a lack of power. Remember to check the spark plugs and ignition coils—if one burns out, the engine may stall. Also, don’t overlook the transmission; automatic transmissions might get stuck in a low gear, and strange noises should raise alarms. I recommend checking the brake light switch yourself, as it’s linked to the safety system and can sometimes trigger false alarms. If the issue persists, take it to a professional shop for diagnosis to avoid further problems.

[McSimon]

Having driven for decades, the throttle failure issue with the Dongfeng Fengshen AX7 is quite straightforward: the ignition system is most prone to problems. If the spark plugs are worn out or one of the ignition coils fails, the engine will shake violently and struggle to run. Additionally, carbon deposits accumulating in the intake pipe can block airflow, making the throttle feel sluggish. Small components like the throttle pedal sensor may also become unresponsive and need prompt replacement. Don’t overlook fuel quality—bad fuel can easily clog the fuel pump. Try restarting the car or cleaning the throttle body first, but older models tend to have more issues, so it’s best to get them repaired early.

[ColeAnn]

Encountering throttle failure in the AX7 requires starting with the engine. If there's an air leak in the intake system or the pipes aren't sealed properly, the engine won't respond due to insufficient air. When the fuel injectors are clogged and can't spray fuel, the car becomes sluggish. Additionally, a malfunction in the electronic throttle control unit (ECU) can cause signal disruption, leading to unresponsive throttle. For automatic transmissions, abnormal transmission sensors often result in failure to shift gears, especially noticeable during startup. You can check the air filter yourself or disconnect the battery to restart, but complex issues require a technician to diagnose with a computer for accurate error codes. Remember to avoid slamming the accelerator to protect the system during normal driving.