maybe someone here can help me.
i have a 90 fc auto coupe that idle's erratically and then it also does not idle in drive reverse or any other gear. ive pulled the codes and tjhe only code im throwing is 13 which is intake air pressure sensor.
my tps is porperly adjust as per FSM and i can't see, to find a vacuum leak anywhere does anyone have much exp with this sort of problem also i believe i also need a torque converter so if anyone has done the auto>5spd swap and wants to get rid of it LMK