[CalibraX] JTEC calibration tool (Chrysler/Jeep/Dodge 68HC16)

[davgeek]

Hey all,

I've been working on CalibraX, a Windows tool for tuning JTEC ECUs — the 68HC11-based engine controllers used on 1996-2004 Chrysler/Jeep/Dodge vehicles, talking over J2534/SCI. Sharing the first public beta here in case anyone wants to kick the tires.

What it does:

Reads and writes the ECU's flash over a J2534 pass-thru interface
Table and scalar editors with correct units/scaling/axis breakpoints per part number — no guessing at offsets
Compare-to-original and Undo while editing
Curve and 3D surface views for any table, not just the raw grid
Built-in update check so you always know when a newer build is out

Licensing: Reading, editing, and saving projects is completely free, no license needed. Writing a checksum-valid flash back to a real ECU requires a license. Details on how to request one are in the app's About window.

Download: https://github.com/davgeek/calibrax-ecu/releases/latest

It's a portable .exe, no installer, no separate runtime needed — unzip and run. Windows will likely show a SmartScreen warning since it's not signed. A SHA256 checksum is published alongside the zip if you want to verify the download.

This is a beta — feedback, bug reports, and compatibility reports on your interface/vehicle are all welcome.

[antus]

Looks good! Watching with interest.

[delcowizzid]

We need a like button haha .great work

[davgeek]

Hi everyone,
I'm still working on it and have uploaded some improvements to the beta release. I'm currently testing custom-coded launch control on the XJ; once it's ready, it will be distributed as plugin for CalibraX. Cheers!

[jakka]

this is really good work!

[davgeek]

A lot of progress in the development, currently testing on a truck Custom Boost OS, boost cut, wastegate valve pwm controller using evap output, real MAP sensor scaling. software now can read and write without any license, custom code will be sold as a patches maybe.

Cheers!