B2300 Regular Cab 2WD L4-2.3L VIN A (1997)
EGR Electronic Vacuum Regulator Solenoid: Description and Operation
COMPONENT
Electronic Vacuum Regulator (EVR) solenoid
FUNCTION
Regulates vacuum supply to EGR valve. PCM outputs a duty cycle to drive the EVR solenoid.
REMARKS
As duty cycle increases, vacuum output also increases. With 0 percent duty cycle or no electrical signal applied, EVR solenoid allows some
vacuum to pass, but not enough to open EGR valve.
