PL720 4WD L4-2389cc 2.4L SOHC (Z24) (1983)
Vacuum Check Valve: Description and Operation
Fig. 54 Check valve.
The check valve is located on the VVT valve bracket in the venturi ported vacuum line. This valve prevents the vacuum acting on the VVT valve from
increasing excessively and activates the EGR system properly.