EGR not working

I have a '94 with the 3.0L. I have pulled a "332" code from the computer "insufficiant EGR flow". There is zero vacuum at the EGR valve up to 2800 RPM (I didn't go any higher). I have replaced the EVP and EVR with any effect. Any help would be much appreciated.

remove your throttle body an see if there is an egr passage under the gasket. I had same problem with my 3.0 dohc and all it needed was the egr passage cleaned out, after spending $75 for a sensor ford has had a problem with clogged egr passages for years