Celebrity L4-151 2.5L (1982)
EGR Control Solenoid: Description and Operation
The ECM controls vacuum to the EGR valve electronically--through the EGR bleed solenoid.
-
When the engine is warm the solenoid is de-energized allowing vacuum to the EGR valve.
-
When the engine is cold the solenoid is energized blocking vacuum to the EGR valve.
-
The solenoid also decreases the amount of vacuum to the EGR valve when the torque converter clutch is engaged.