trying to read between the lines, is it stalling when the throttle gets closed? You might take out the idle mixture screws and shoot a 3 second blast of starting fluid into each port then replace the idle mix screws. Before you remove them screw in CW to lightly seated & count that number of turns to easily return them to their orig position and I put the same screw into the same hole it came out of (OCD). mod the plastic nozzle on top of a can of starting fluid slightly so you can affix a thin red straw to it so you can get up in the ports. Holler how it turns out