Why does the JMC Shunda suddenly stall during normal driving?
4 Answers
JMC Shunda suddenly stalls during normal driving due to fuel quality issues or circuit board problems. Below are the specific reasons for the JMC Shunda suddenly stalling during normal driving: Fuel quality issues: Water or impurities in the fuel tank, clogged fuel injectors, or dirty filters; inspect and clean the fuel supply system. Circuit board problems: If the vehicle stalls, depending on the road conditions, if there is no emergency, you can gently apply the brakes to prevent a rear-end collision. After reducing speed, steer slowly to the roadside lane. Be sure to keep the brakes pressed continuously. Apply increasing pressure gradually—do not pump the brakes, as this will deplete the remaining vacuum.
The day before yesterday, I was driving my Shunda delivery truck when this happened—suddenly stalled while cruising at 60 km/h. Don’t panic, first check if the fuel tank is empty. Diesel engines shut down immediately if the fuel pump runs dry, and some older trucks have inaccurate fuel gauges. If you just refueled, it’s likely a fuel line issue—last time for me, the diesel filter was completely clogged, and replacing it fixed the problem. Another possibility is a burned-out fuel pump relay, located in the fuse box under the steering wheel—if it’s hot to the touch, that’s probably it. Loose battery terminals can also cause sudden power loss; try tightening the screws with a wrench. Whatever you do, avoid forcing a restart—call a tow truck and have a repair shop check the fuel pump and electrical system to be safe.
Those who drive Jiangling trucks know that sudden stalling is all too common. Once, I stalled on the national highway because I ignored the water separator alarm, and water got into the engine, causing it to shut down completely. Diesel vehicle owners must remember to drain water regularly, especially when refueling at small gas stations. Electrical control system glitches can also cause this—just like a phone freezing. Turning off the ignition and waiting three minutes before restarting might fix it. Another troublemaker is the crankshaft position sensor; if it fails, the ECU gets completely confused. If you smell something burning, cut the power immediately—it could be a short circuit. I recommend keeping an OBD scanner in the car; scanning the fault code will quickly reveal the issue.
Last time when driving a Shunda for delivery, the engine stalled, giving me a cold sweat. Briefly, here are a few possible reasons: the diesel filter needs replacement causing insufficient fuel supply; the coarse filter screen in the fuel tank is clogged with debris; the injectors are stuck due to carbon buildup; more troublesome is the wear of the high-pressure fuel pump, which is costly to repair. By the way, for National V and VI vehicles, special attention should be paid to the urea system—crystallization blocking the exhaust pipe can also force the engine to stall. First, check the dashboard warning lights. If none are lit, try listening for the fuel pump's hum when turning the key. If it's silent, it's a fuel supply issue. Avoid continuous ignition attempts; calling for rescue is the safest bet.
