I have a 89 Cherokee Laredo and swapped the motor with the a 91 HO that I rebuilt. I kept the Renix wiring system and used the HO intake and TB and made a TPS adaptor for it. My trouble is when I get to about 1/4 throttle it coughs, spits and sputters but will still excellerate but sounds rough. ALL MY SENSORS ARE NEW except the MAP sensor and it wasn't giving me any trouble before i did the swap. DO YOU HAVE TO HAVE A MODDED (ADJUSTABLE) MAP SENSOR TO RUN THIS THROTTLE BODY ON THE RENIX SYSTEM? I've checked my timing 3 times and its dead on, TPS is set correctly, used the renix flywheel and distributor, grounds are good, wiring harnesses are good to go, no Vaccum leaks, new cap, rotor and wires, new renix injectors, new renix fuel pressure regulator, filter and fuel pump is not that old either. I've done a lot of reading in this forum and have seen similar problems but I haven't seen any posts where they found the problem and fixed it. This is a clean jeep and would really like to get it on the road any help is appreciated. TIA