I tried another stock parts store replacement ECU I find that I didnt realize I had with no change on the idle. I'll throw another coil on there the next time I get the car out. I tried an extremely rich jet and rod combo on the old carb and that didnt help the situation either. I totally agree on fine tuning with a wideband but how useful would it be just to establish a base idle and is there a such a thing as a no weld O2 bung kit?