I just bought a used 2002 Blaster. When I first start it in neutral the RPMs ramp way up unless I put it in gear and go. It seems to be relate to the choke. If I warm up the engine a bit and then put it in neutral for it will idle properly sometimes. If it doesn't idel right I can control the wild idle by adjusting the choke. What would cause this? Bad choke? Bad carb? Has anyone else seen this issue? What fixed it?