I would like to thank everyone for helping. I will get around to replacing the EHA, but for the time being, I put it all back together, with a new air filter, PCV breather hose (from the crankcase to the air filter. The old one was cracked.), and ran Seafoam through it.
The DEQ results were astonishing:
THC 0.71/1.2
NOx 0.29/3.0
CO 8.5/30
Compared to the last test, it's like a brand new car.

So once again, thank you everyone for your help. This site is an excellent resource.

Michael