Bump!

OK. I am hoping someone can give me a few hints here as this problem is persisting.
Considering I had a noticeable difference in behavior when I unplugged the EHA valve, I replaced it with an almost new unit that I bought from PS2CHO. teh existing valve looked like it was a replacement and it turns out the seals were leaking slightly.
Installed the valve , plugged it in , adjusted the Fuel/air screw to lean it out a bit and it ran great. this lasted for about a day before it started acting up and after about 3 days I had to unplug eh EHA valve and enrich the mixture to make it drive-able again.

Any suggestions?

Thanks in advance