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Home >> Ford >> 2005 >> Excursion 5.4 L, 4WD >> Repair and Diagnosis >> Engine Mechanical >> Auxiliary Emission Control Systems >> Engine Emission Control System >> Description And Operation >> Engine Emission Control >> Notes
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Engine Emission Control: Notes

CAUTION: Do not remove any part of the engine emission control system. Operating the engine without the engine emission control system will reduce fuel economy and engine ventilation. This will weaken engine performance and shorten engine life.

Some engines are equipped with an exhaust gas recirculation (EGR) system. The function of the EGR system is to reduce the emission of nitrogen oxide (NOx).

The engine emission control consists of the following components:

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