Engine Stalls When Stopping at Traffic Light: What’s Really Causing It and How to Fix It Direct Answer:If your engine stalls when stopping at traffic light, the most common causes are a dirty throttle body, failing idle air control valve, vacuum leak, weak fuel delivery, or a bad crankshaft sensor. The engine can’t maintain stable […]
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Engine Overheats Only in Traffic If your engine overheats only in traffic, the problem is almost always airflow or heat management at low speed. When the car isn’t moving, cooling depends on the radiator fan, coolant flow, and sensors. A weak fan, stuck thermostat, air in the system, or partially clogged radiator are the usual
Engine Vibrates Only at Idle When an engine vibrates only at idle, it usually means the engine is running unevenly when load is lowest. Common causes include worn engine mounts, minor misfires, vacuum leaks, dirty throttle components, or incorrect idle control. The vibration disappears at speed because engine load and RPM smooth out the imbalance.
