Cold Start Diagnostics

A cold start can be a chaotic event for an engine. Cold temperatures increase air density, and the fuel trim has to match. Understanding how an engine operates when it first starts can help you formulate a diagnostic strategy to resolve complaints that start with the phrase, “It only does it when it is cold.” In this video, we cover the events that occur during a cold start.

Видео Cold Start Diagnostics канала NGK Spark Plugs USA