I need some help. I have an 87 FJ60 that has a Jimc rebuilt carb from about a year ago, new fuel pump(oem) same time, and just changed out fuel filter. At idle it is fine , about 1200-1800rpm it will hesitate for a second or two then return to normal, above 2000 rpm it will act like it only has 3/4 power but no hesitation at all. It will not do this all the time , it did it going to gym this morning and all day yesterday, but by the time i got back home (25 mile one way country driving ) it would not do it . Going down the road it will buck every once in awhile. It has been doing this about one week now, but not all the time. Only when it wants to it seems. I was thinking maybe trash in the bowl or a clogged jet. Watching the site glass the fuel never gets below 1/2 way down so I would guess it is not the pump. Or maybe just bad gas could do this. Any help would be greatly appreciatted.