LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Emission Systems (Diesel Engines) >> Exhaust Gas RECIRCULATION >> Notes

Exhaust Gas RECIRCULATION: Notes

NOTE: For additional information on the Exhaust Gas Recirculation (EGR) system, see appropriate SYSTEM & COMPONENT TESTING article.

The EGR system limits formation of oxides of nitrogen (NOx) emissions by reducing peak combustion chamber temperatures in which NOx is formed. EGR system consists of an EGR valve, EGR vent/EGR solenoids and EGR fault detection. A vacuum pump is required to provide a vacuum source to operate the EGR system.