Yes, the EHA is bad. Looking at it closely, I get a feeling it was a salvaged item. It shows more wear than the other plastic components in the engine compartment. It's a 34-year-old car, so that is to be expected. I'm trying to buy new, but some things are not available new. Now that I know everything working, I'll pull the FD back off and recheck the PN is at 0.6mm. Put it back in, check the DP to 0.4 bar, and adjust the sensor plate for proper height. Pierre talks about using a vacuum gauge to set that. I think I can put a "T" in the vacuum line from the back corner of the manifold to the instrument cluster and get a good reading there. The EHA that's working I picked up on an extra FD I bought.

Thanks again for your input.