What causes a Buick Excelle automatic transmission to suddenly stall while driving?

[LeSilas]

Common causes of sudden engine stalling in vehicles include: 1. Vacuum leaks in the intake manifold; 2. Unstable idle due to improper idle adjustment, dirty throttle body, or malfunctioning idle control system; 3. Unstable fuel pressure caused by excessive wear or poor contact of the electric fuel pump brushes, or clogged fuel pump filter; 4. Blocked or leaking EGR valve; 5. Malfunctioning fuel pump relay, EFI relay, or ignition relay; 6. Poor contact in the fuel pump drive circuit or fuel injector drive circuit; 7. Ignition system issues such as weak or no spark due to worn spark plugs, incorrect ignition timing, poor contact in the ignition coil, or inter-turn short circuits when hot, as well as poor contact in low-voltage circuits, damaged insulation causing intermittent grounding, or poor grounding.

[LolaDella]

The Buick Excelle's automatic transmission suddenly stalled while driving. I've encountered this situation before, that time was on the Second Ring Road elevated highway, the car stalled as soon as the speed slowed down, and I thought the car was broken at the time. Later, I went to the repair shop and found out it was due to a clogged fuel line, insufficient gasoline supply causing the engine to stop. The mechanic said the fuel filter was too dirty and hadn't been replaced, and over time the buildup would affect fuel supply. When driving, encountering traffic lights and idling makes it more prone to stalling. This kind of problem is quite common, mainly due to improper maintenance. Usually, you should pay attention to using gas stations with good quality fuel, don't try to save money by using inferior fuel. For safety, once the car stalls, immediately turn on the hazard lights and pull over, don't force it to drive, to avoid damaging the engine or other components. Timely repair can solve the problem, and the cost is not high.

[DiLandon]

The Buick Excelle automatic transmission suddenly stalls, and there may be several reasons: First, check if the fuel pump is faulty—listen for any buzzing abnormal noise during startup; second, it could be a spark plug issue, indicating a malfunction in the ignition system; third, check if the air filter is clogged, as insufficient air intake can also cause stalling; fourth, inspect whether the battery or alternator voltage is stable, as too much voltage drop from excessive use of electrical devices may trigger this problem. Try troubleshooting yourself: First, open the hood and check for any loose cables, then pull out the spark plugs to see if they are blackened; if you have a diagnostic tool, connect it to the OBD port to read the fault codes. Regular maintenance, such as cleaning carbon deposits and the throttle body, can help avoid similar issues, saving both money and hassle. Safety reminder: If the car stalls, pull over immediately and check before driving again.

[McBrandon]

Automatic transmission Excelle stalling halfway is often caused by improper idle control or sensor issues. I've experienced similar problems before with a comparable car, mostly due to thick carbon buildup on the throttle or a dirty throttle body leading to insufficient air supply and stalling. Preventive measures: Regularly clean carbon deposits and replace filters at maintenance shops every few thousand kilometers. Neglecting maintenance can lead to high fuel consumption and easy stalling, which is quite dangerous, especially when visibility is poor after rain. Good car condition ensures safety; maintain steady speeds without sudden acceleration in daily driving. If any issues arise, pull over to check the warning lights—don't take risks. Simple maintenance can usually resolve these problems.