Originally posted by jehcpa
EMS on a rex? Closed loop fuel control is via the front O2 which is wider than 1v. The rear O2 is 1v and only for monitoring cat efficiency it plays no role in engine management.
Many have said that they have not been able condition the signal from any other source to duplicate the signal the ECU uses for closed loop fuel control. Do you know of a way?
Admittedly, I know nothing about the rex. If what it responds to is fairly linear, and between 0 and 5V, you might be able to get it to work as is. If not, you might email Klaus (email earlier in this thread) as he might be able to make something work if he is given the correct response curve.