Hey Benginetuner
did you ever work out what was causing the issue?
i have a fairly stock rx8 and have got power steering issues a week after switching my ecu, throttle body, radiator and fans. ive soldered all the connection plugs between eps motor and the control module. there is continuity where it should be. ive followed the troubleshooting guide to the point it says to replace the module and or rack (https://www.rotaryheads.com/PDF/RX8/8Steering.PDF).
in mazda iDS datalogger i get perfect readings from the torque sensor like you did, the eps motor jumps from 0.00A to -1.00A and the torque sensor correction is stuck on 1.75Nm. i assume its the control module and have purchased one from overseas but thought id see if i could find anything else out in the meantime.
cheers!
