What Causes an Automatic Transmission Vehicle to Stall While Driving?
2 Answers
An automatic transmission vehicle stalling while driving can be attributed to electrical circuit faults, equipment malfunctions, or fuel system issues. Below are detailed explanations for each of these causes: Electrical Circuit Faults: During driving, stalling may occur due to low-voltage power failure or quenching. In such cases, the primary components to inspect are the ignition switch and starter switch, as well as the fuse box. A short circuit in the low-voltage wiring can also cause stalling, which typically manifests as intermittent stalling. It is essential to examine the vehicle's low-voltage wiring. Equipment Malfunctions: This issue is often related to the ignition coil, capacitor, or electronic ignition module. The vehicle may start initially but stall after a short period. It can be restarted, only to stall again. Fuel System Issues: Stalling can result from a damaged fuel pump, ruptured fuel lines, a clogged carburetor inlet, or an empty fuel tank. However, in these scenarios, the vehicle can usually be restarted. Problems with the ignition system or the engine's overheating and anti-knock system can also lead to stalling.
After driving for so many years, I'm no longer surprised by automatic transmissions stalling while driving—it's usually due to a few common issues. A faulty fuel pump is the most frequent culprit; if gasoline can't reach the engine, it stops. Or there might be ignition system problems, like dirty spark plugs or a short-circuited coil, causing the engine to stall when it fails to start. Sensor malfunctions, such as a failed crankshaft position sensor, can also lead to stalling if the computer miscontrols due to missing signals. Sometimes, an alternator failure or an aging battery causing unstable voltage can trigger a stall. Safety first: when stalling occurs, the steering wheel becomes heavy, and brake assist weakens—immediately turn on hazard lights and pull over to avoid rear-end collisions. Don’t rush to restart; check the warning lights first. If it happens frequently, get it repaired—replacing a small part can solve the problem, saving a lot of hassle.
