On an RX8, the electronic power steering and tach are activated by the trigger wheel sensor on the front of the motor. I have a 13B-RE in my RX8 and have been using a stock RX8 trigger wheel and sensor attached to the front of the crank pulley connected to the stock RX8 ECU in order to get the EPS and the tach to function.

I'm wondering if it's possible, using a PWM/AUX out on the E6X, to simulate this signal and feed it to the stock ECU so I can get rid of the trigger wheel and sensor? Long shot I know, but still...

 

The simple answer, no, the trigger pattern from the stock crank trigger wheel would have to be simulated perfectly to be able to accomplish that, and alas, that is something the ECU cant really do. You would have to construct some form of electronic box that would incorporate something that would simulate the trigger pattern exactly AND be running at the same RPMs as what your engine is running for correct operation.

You have to leave the trigger wheel and sensors in place in order for your gauge cluster and a few other functions to work.

The only other solution is to just gut the stock electronic system out and that would literally mean turning your nice comfy street driven RX-8 with AC, stereo, etc, into a race car, do you really wanna do that?