ls2twntur1200hp

I just bought an 88 camaro with a rebuilt 305. Its got the holley intake and throttle body, comp cams emission legal cam and a edelbrock exaust. As far as i know the computer is stock. The problem is its getting way to much fuel. I know the aic motor isn't working but i didn't think that was the problem. I've also turned the fuel pressure all the way down to see if that was the problem but didn't help. Also it missis at idel and hesitates up the power band. The plugs, wires, cap and roter are new.