The EVAP purge solenoid should be on top of the intake manifold towards the firewall. Should be visible and the manifol nipple is just right inder it. You may know this but the JDM intake manifolds do not have a place for the EVAP purge solenoid. Make sure it's not JDM. I have done many JDM swaps and had to tee a vacuum source for the EVAP purge solenoid. Hope this helps.