turbo2mazda1988

i have a 88 rx7 convertible i swaped a turbo motor in it from a 87 rx7. i swaped the motor , tranny, rearend, computer , motor wire harness, sensers, i did not change the wire harness to the rest of the car as it would be to much work. i do have some mods on the car . 3" air intake, 3" exhast, light fly wheel, boost controller set to 14 psi. when the motor was in the 87 it ran good and it had all the same mods. then i put it in the 88 convertible and now it is running super rich. im not sure what to do. the only thing i can think is it has something to do with the wire harness. i know meany people have done this swap so hopefuly someone can help me.