PL720 4WD L4-2389cc 2.4L SOHC (Z24) (1983)
Vacuum Delay Valve: Testing and Inspection
1.
Remove vacuum delay valve from engine.
2.
Blow into port on EGR control valve side. Air should flow through valve.
3.
Blow into other port. Air flow resistance should be greater than in step 2.
4.
If condition of valve is questionable, dip port into water and blow air from brown or violet face side. Air bubbles should appear. Avoid entry of
oil or dirt into valve.