What kind of reading should i be getting? Is there there a wide range of values depending on other factors?

 

The EGR solenoid resistance should be between 30-100 ohms. An ideal solenoid (new) should be 32-35 ohms.

The voltage reading you may get at the EGR solenoid may or may not be significant. The EGR solenoid is supplied with 12VDC from the GAGE circuit fuse. The ground lead from the EGR solenoid is switched by the ECM. The ground is switched rapidly, and for a varying time and duration (Pulse Width Modulation - PWM) to operate the solenoid rapidly open and closed to vary the amount of average vacuum applied to the EGR valve pilot. You'll find that the EVAP purge solenoid operates in the same manner, as do the A.I.R. injection select and port/divert valves.

Connecting a meter to the EGR solenoid may yield some unusual voltages if this switching is happening at varying rates. Your meter could indicate anything between 0 and 12V depending on the pulse width, whether the EGR is being operated and all, the meter propogation delay and count rate, whether the meter is a true RMS type, and probably some other factors I'm overlooking. And all of this could be completelty normal. As long as the GAGE circuit is providing 12VDC at the EGR solenoid "A" terminal, the ECM should handle the rest.