The spring was in what I would call just about perfect condition before I broke a couple of mm off the end where it clips into the throttle butterfly. I just slightly re-shaped the end of the spring so it clipped into where the rod goes in. The spring is not bent or out of shape in any way which made me think it might not be the cause of the continued hunting.
This one is still beating me! I am frustrated with it but no enough to give up yet.
