S13 SR20DET Vacuum piping

[chick_z]

I bought a S14 but it comes with a S13 SR20DET that is replaced by the previous owner. Some of the vacuum pipes are disconnected (Circled). Does anyone know where these vacuum pipes should connect to?

[metako42]

Thats the Exhaust Gas Recirculation valve - the small hose on top goes to the EGR control valve on the firewall, the big ones below that go to the exhaust dump pipe and the air intake, but I can't remember which goes to which.

[chick_z]

Thnaks Metako42, would it be any issue if just leving the EAI valve and the big ones below diconnected?