Hondata

Are you getting a speed sensor reading in your datalogs?

If you return to stock the original Honda factory calibration will be uploaded and the immobilizer will be enabled. You will not be able to return to stock. You may be able to get a file from Ariel that is what is currently on it, but you will not be able to "return to stock" as it is.

I'm sorry, but we don't offer anything for your vehicle.

Sounds like a wiring issue somewhere.

Have you discussed this with your tuner to see if they can give you a calibration to get it there for tuning?

Having our software engineer take a look at this.

What is the serial number on the K-Pro board inside the ECU?

It looks like the ECU's socked for use with the s300 have other modifications and altered circuitry and they may be damaged or not have the correct circuitry for AC to work.

It could be the dead times of the injectors

They are completely different pumps.

You cannot use the FlashPro.

You must use the K-Pro and compatible ECU form the list at: https://hondata.com/tech-rsx-ecu-reference

With everything plugged in and the ignition in the on position, go to the Help menu and click on “send feedback”. Include a detailed description of the issue.

Has the ECU been jailbroken?

Try deleting all saved datalogs and then make new ones and see if this resolves the issue.

How are you determining that the multi-tune is not working correctly?