I checked the cables and tried the adjustment screws with no success. Next step I guess is to open the Carburetor back up. I did notice that there seems to be some lateral play in the throttle shaft. Not sure if it's supposed to be there. I was looking at the Diagram provided by impco and was looking at the Idle cutoff Piston and spring. I remember this was pretty gummed up when I cleaned the carb. Does that part have something to do with this issue.