I had same problem with mine. The fix it to adjust floats. I believe the book says quarter inch below for the floats, however, this is terrible setting if you offroad steep hills. I set mine at a little over 3/8s below and it help tons. Might be able to do a hair more, but I was worried about starving it at high speeds wide open. It has no prolonged wide open throttle problems where it is now.
89 YJ Islander, AC,PS, 10 inch lift, 32 BFG MT's, sway quick disconnect, rear track bar quick disconnect, 400 watt 12 speaker cd player for tunes,8000lb warn 8274 with 150 ft cable, and a high lift jack.. Lockers, 35's, webber carb and jacobs ignition comming soon.