I've looked at the Vacuum Diagrams and it doesn't have anything about EGRs on 92 Caravans but on the 93-94 it shows the EGR Valve/Transducer assembly but on my van I don't see any of the wires for it and no place for the valve to mount I know where it should mount but there's nothing there.

 

Do you have an EGR tube bolted under the throttle body? If you don't, then you don't have an EGR valve.