Sunday, January 26, 2014
What Is an EGT Sensor on a WRX
An exhaust gas temperature (EGT) sensor is a device used to measure a car engines air-fuel ratio. It often is used on high-performance vehicles, particularly those that have turbocharged engines.
Purpose
The EGT sensor monitors the temperature of the exhaust system of certain internal combustion engines, specifically those that are turbocharged for high performance, like the Subaru WRX.
Placement
The EGT sensor can be placed before the turbo, where it measures the temperature of air as it enters the turbine, or after the turbo, where it measures the temperature of the exhaust.
Importance
High engine temperatures in an engines combustion chamber can cause detonation, resulted in melted valves and pistons, and generally destroying the engine. The EGT sensor can warn the operator of dangerously high temperatures, thus preventing fatal engine malfunction.
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