The BBD is one of the easiest carbs to overhaul, but care must be taken any time you open any carb up.
Did you tnnk soak the carb after disassembly?
Did you do the "BBD Idle Mod" to allow it to use gasahol?
How did you set the float? What fuel pressure are you running? Did you install a new fuel filter and flush the fuel lines?
Did you have any trouble aligning the main jet needles in the jets when you put the top back on?
Did you use a vacuum gauge to set the idle mixture screws? Is your computer properly controlling the idle needles?
Also, you need to fill out your profile so we know what all is installed on your Jeep.
Carter BBD feeding 4.2 Nuttered 6 banger = 22 MPG Hwy
If it was easy, everyone would be doing it.