2 weeks a go I put a new gas tank and sending unit. Last week my rear carb was coughing up gas so I pulled the needle and seat and cleaned it. Today it was surging on the freeway. I got home and checked the sight plug. Gas was pouring out of the sight hole. I adjusted the float down a little and no gas was coming out of the hole. Not even a dribble. This was with car off and shaking the car a little with my hip. So I adjusted the float a tad. Now gas is pouring out of the sight hole again. I did put the float in a cup of water and noticed no bubbles. Does this sound like a bad float? I noticed the the idle was about 1400 when the float was high. Can the idle be high with a high float? I did order a new float just in case.