Well just as an update. I have gone over the entire system as best as possible.
I started by checking/inspecting the fuel system. I replaced the inline tank filter, the fuel filter/accumulator & pump assemblies. Problem still apparent. At this point I checked the current to the EHA. I wasn't all that happy w/ the results, so I replaced it w/ a new unit. No change
I was getting frustrated as hell, b/c I have already dropped over $4k into the car.
From that point, I looked at the possibility of having a defective O2 sensor. Again, swapped it out w/ a new unit. While doing this I said WTF & changed out the KE control unit as well. Still experiencing a hesitation !!!
From this point I am wondering if the poteniometer on the airflow meter has a flat-spot in it. Or if the internal workings of the fuel distributor are fuc*** up. I have check for all possible degradated wire connections and/or possible vacuum leaks. NOTHING !!!!
I love my 16-vlv and just got done swapping a 93 sportline interior into it and aside from the surging issue, it's GREAT !!!!
BUT I HAVE ABOUT HAD IT !!!