What is the reason why a truck suddenly cannot accelerate while running?

[DeEthan]

The reason why a truck suddenly cannot accelerate while running is that excessive sludge accumulation in the engine's fuel injectors causes poor fuel flow. The solution is to clean the fuel injectors. The steps are: 1. Unplug the fuel injector's connector; 2. Remove the two screws fixing the fuel injector; 3. Take out the entire fuel injector; 4. Place the fuel injector on throttle cleaner for cleaning. A truck is a commercial vehicle primarily designed and equipped for transporting goods. It has a larger load capacity than ordinary flatcars, a heavier self-weight, and more axles to adapt to the limitations of axle load and load per meter allowed by the route.

[OCarter]

As a veteran truck driver with years of experience, let me address this issue. When a truck suddenly loses power while running, the most common cause is a problem with the fuel system, such as an aging fuel pump or a clogged filter, which cuts off the fuel supply and chokes the engine. I’ve encountered this several times—after long, bumpy trips, debris accumulates in the fuel lines, requiring immediate inspection of the pump and fuel pipes. Don’t push through it, as stalling on the highway is dangerous. Additionally, an inaccurate fuel gauge or an empty tank can cause similar symptoms. Don’t rely too much on the dashboard; developing a habit of refueling every 500 kilometers can prevent trouble. If the issue recurs, it might be due to poor fuel quality or a glitch in the electronic control unit, requiring a professional shop to test the wiring with a multimeter. In short, it’s an old but crucial lesson: regular maintenance of fuel components is key—neglect it, and you risk a breakdown.

[StCarmen]

As an amateur car repair enthusiast, I often tinker with my own pickup truck. When a truck suddenly can't accelerate, it's mostly related to electronic components, like a faulty throttle position sensor or a failed ignition coil. If the signal doesn't reach the engine, it will jerk and stall. I've had a similar situation before, and after troubleshooting, I found that a dirty mass airflow sensor caused abnormal air intake, affecting the air-fuel mixture. You can do a simple self-check: first, check if the battery voltage is stable, or try turning the engine off and restarting to see if it recovers. If that doesn't work, you can open the sensor cover to clean the dust, but it's best not to do it on the road. For daily maintenance, I recommend frequently cleaning dust from the engine compartment to avoid circuit short circuits, which can prevent 90% of failures. Don't underestimate these small issues—fixing them in time can save you a lot of money.

[McMaya]

Just finished modifying the engine of an old truck, sharing some personal insights. Mechanical issues are the main culprits, such as a stuck throttle or worn spark plugs, making it hard to accelerate when the fuel isn't delivering properly. I remember during a test drive, the transmission system overheating also caused sluggish throttle response—fortunately, I stopped to let it cool for a few minutes before continuing. Modified vehicles are more prone to such issues, so it's essential to change the oil and perform maintenance every 10,000 kilometers to avoid leaks from aging hoses. If you frequently drive in mountainous or high-temperature areas, the air filter clogs faster, affecting combustion efficiency. If you're handy, keep a set of tools in the car to replace wear-prone parts on the go. But don't tinker recklessly—if you lack experience, it's better to rely on a trustworthy repair shop for peace of mind.