What Causes a Wuling Hongguang to Suddenly Stall While Driving Normally?
4 Answers
Wuling Hongguang suddenly stalling during normal operation may be caused by excessive carbon buildup in components such as the throttle body, idle speed control valve, intake valves, intake manifold, combustion chamber, spark plugs, and fuel injectors. Relevant explanations are as follows: 1. Cause: Carbon deposits can block the idle passage, causing the idle speed control valve to stick or exceed its adjustment range, leading to low idle speed, unstable idle, and engine stalling when releasing the throttle. 2. Precautions: Pay attention to checking whether the fuel injectors are leaking. Fuel injectors constantly in the fuel supply state will cause an overly rich air-fuel mixture during low-speed driving, resulting in unstable idle speed after releasing the throttle. If the condition worsens, it may lead to engine stalling.
Last time I was delivering goods in my Wuling Hongguang, I encountered this issue—suddenly stalled while driving. First, I checked the fuel pump because the Wuling Hongguang's fuel pump is positioned low and prone to sucking up debris from the bottom of the fuel tank. Then, I inspected the ignition coils and spark plugs, as excessive carbon buildup can cause poor ignition. If the alternator belt is loose, it can also drain the battery and lead to stalling. Oh, and the crankshaft position sensor failure is the most common issue; if it fails, the ECU won't know when to ignite. In the end, I found out the throttle was too dirty and stuck—cleaning it fixed the problem. Older cars especially need attention to sensor and fuel system maintenance. Parts for this car are cheap, but basic upkeep requires extra care.
Over the years of car repair, I've encountered many cases of Wuling Hongguang suddenly stalling. Fuel system issues account for the majority, such as clogged fuel filters or burned-out fuel pumps causing insufficient fuel pressure. For electrical circuits, focus on checking the fuse box, as a faulty generator regulator can lead to unstable voltage. Among sensors, the crankshaft position and camshaft position sensors are particularly critical - Wuling's OBD system will cut fuel supply immediately upon detecting faults in these. For automatic transmissions, also check the gearbox sensors. Additionally, a clogged fuel tank cap vent causing negative pressure can prevent fuel suction. It's recommended that owners keep an OBD scanner handy to read trouble codes first when stalling occurs before troubleshooting.
My friend's Wuling Hongguang had this issue last week—it suddenly stalled while waiting at a red light in the city. After towing it to the repair shop, they found the spark plug electrodes were burnt out, and replacing them with NGK spark plugs fixed the problem. The mechanic mentioned other common causes for such vehicles include: loose battery terminals causing poor contact, clogged fuel injectors, and dirty mass airflow sensors. Wuling's ECU is quite sensitive; even interference signals from aging wiring can trigger protective stalling. Later, I helped him by adding fuel system cleaner to the tank and regularly cleaning the throttle body, and the problem hasn't recurred. For older cars, maintaining clean fuel and electrical systems is crucial.
