If your Ford F-150 stalls right after starting on a cold morning, common culprits include a dirty throttle body, failing coolant temperature sensor, or vacuum leak. Here’s what to check first.
Common Causes of Cold-Start Stalling
When your F-150 struggles to stay running after a cold winter start, the engine's air-fuel mixture is likely off. The most frequent offenders are a carbon-fouled throttle body or a faulty coolant temperature sensor (CTS). A dirty throttle body restricts airflow at idle, while a bad CTS sends a falsely warm signal to the PCM, leaning out the mixture. Also inspect the idle air control valve (if equipped) and the mass airflow sensor—both can cause stalling when cold.
