As I said I have some documents about the Motronic MP3.1, mostly in French but worth the read. You can probably use optical character recognition and automatic translation online to create english versions, I don't think my english is good enough for proofreading.   Due to the upload limit I had to find them on the internet again.   First the XU9J2 from the 405 and BX:   http://405sri.free.fr/Documentation/manuels_atelier_405/405__114-F-02_90_MOCIR_01_moteur_XU9J2_injection-allumage_bosch_motronic_MP3.1__controles_interventions_reglages.pdf http://405sri.free.fr/Documentation/manuels_atelier_405/405__158-F-09_90_MOC_AI_01_moteur_XU9J2_injection-allumage_bosch_motronic_MP3.1__controles_interventions_reglages__additif.pdf http://www.lacitroenbx.com/~gwen/divers/bx/NT_BX_01_101.pdf   Then the TU3FJ2, this one is really cool but a bit strange as it's way beyond what a mechanic needs to know to fix a car:   https://prepa205gti.files.wordpress.com/2014/01/bosch_motronic_mp3_1_ax_gti_institut_citroen.pdf   And some in English:   http://www.squadramoravia.com/manual/33/ignition/MP31.pdf http://www.alfa145.com/upload/Alfa145Manual/Volume 3 - Section 2/Injection & Ignition Boxer - 1.6 - Motronic MP3.1.PDF https://prepa205gti.files.wordpress.com/2014/01/bosch_motronic_mp3_1_toutes_marques.pdf   There is also the AFM delete mod from the 309 GTI16 Gr.A, too bad the special .bin file from this ecu is nowhere to be seen:     Speaking of .bin file does anyone have the ZX 1.9i one?