Check The PCSV

Ignition "OFF".
Disconnect PCSV and Vacuum Hose.
Apply vacuum on PCSV with Hand Vacuum Gauge.
Is the PCSV keeping the Vacuum?
YES
- Go to "Check Injector" as below.
NO
- Substitute with a known-good PCSV and check for proper operation.
  If the problem is corrected, replace PCSV and then go to "Verification of Vehicle Repair " procedure.