WTB F355 TCU simulator

I drew up and posted instructions a couple of years ago a unit to do this. https://www.ferrarichat.com/forum/threads/simple-2-7-slow-down-ecu-replacement-only-for-no-cats.538719/#post-145063031 Quite easy to bypass. My intention was to create a bypass for de-catted cars and I only tested it on a 2.7 car which 100% resolved the slow down light issues. I can potentially put something together for you, but it will be on an "all care, no responsibility basis" as I no longer have access to a 355, and I really strongly recommend against bypassing overtemp circuitry when cats are still installed.

The risk is clear: if you do indeed have a cat overheat problem the bypass will hide it and result in risk of a fire.

If you're happy to accept the above risk then I would be interested to see if it works on a 5.2 car. Fire me a PM and we can work out getting you a test unit.

 

I have one in Australia. I made mine and from these drawings/guidelines and it's a 5.2 version for the bypass valve. I have checked my cats multiple times and everything is spot on, No issues at all. Very easy to make and components are super easy to get. I just set my volt values as per the instructions. I know there was some negative feedback and that's fine everyone is entitled to there opinion. My car had no cats when I got it and I installed cats so its compliant in Australia. Again I've had no issues other than after installing new mini cats having to put sensor extensions on the post cat sensors. I would sell one I made 3 off them. If your interested let me know and I would set the voltage and post to you.

 

Forgot to mention I'm happy to post a picture if required.