October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

EGR Thermal Vacuum Switch

EGR TVS, used on all models, closes to prevent EGR operations when engine coolant temperature is below 85°F (29°C). This improves cold engine driveability. When coolant temperature rises above 85°F (29°C), TVS opens to allow vacuum to be directed to EGR valve.