What is the reason for intermittent throttle failure in the FAW J6?
4 Answers
The reasons for intermittent throttle failure in the FAW J6 are as follows: 1. Carbon deposits: With prolonged use, the interior of the vehicle may accumulate sludge or other contaminants due to incomplete combustion, which can adhere to components and cause the engine to stall during operation. 2. Road conditions: Apart from internal components, throttle failure can also be related to road conditions. For example, driving in congested traffic with frequent acceleration and deceleration can prevent vehicle components from responding promptly, leading to throttle failure and weak starting performance.
When driving heavy trucks like the FAW J6, I once encountered an issue where the throttle wouldn't respond, especially during long-distance hauls when sudden power loss would send chills down my spine. This intermittent acceleration failure is most commonly caused by an aging throttle pedal sensor, which is responsible for transmitting the throttle signal to the ECU. If the connection is poor, the truck behaves erratically, sometimes working and sometimes not. Another common issue lies in the fuel system, such as a clogged fuel filter or an intermittently malfunctioning fuel pump—when fuel supply is insufficient, acceleration naturally suffers. The electronic control unit (ECU) might also have bugs, with software errors causing sluggish throttle response. Sometimes, loose wiring connectors can cause intermittent connections due to vibration, or a heavily carbon-fouled mass airflow sensor can disrupt air intake. Back then, I first checked the throttle connector myself to ensure it wasn’t loose, then promptly drove to a repair shop to inspect the wiring and sensors. In the end, replacing the sensor fixed the issue. My advice: don’t push through long trips with such problems—get a professional mechanic to diagnose it with a scanner. Safety first.
When encountering the issue of the FAW J6's throttle not responding, my experience suggests it's mostly related to the electrical circuit or fuel supply. The first thought is that the throttle position sensor might be faulty, causing unstable signal transmission—when pressing the accelerator, the ECU doesn't receive the command, preventing acceleration. Secondly, a clogged fuel pump or filter can restrict fuel flow, especially in older vehicles where dirty fuel lines are more prone to intermittent failures. Additionally, aging wiring or loose connections can cause intermittent disruptions due to vibrations, or carbon buildup in the throttle body can lead to uneven air flow. While helping friends repair their vehicles, I've frequently seen such issues. Prioritize testing the sensor's resistance and fuel pressure. If the problem occurs intermittently, it's best not to overlook checking the relays and ECU software, as unresolved issues can easily lead to misdiagnosing more significant faults.
When driving the FAW J6, I occasionally experience unresponsive throttle, which could be caused by aging sensors leading to signal interruptions, or loose circuit connections causing resistance changes. A clogged fuel pump or filter resulting in irregular fuel supply can also cause this issue. To prevent such problems, regular inspection and maintenance are crucial. I always clean the sensors and fuel lines to minimize the risk of malfunctions.
