# EMU Classic V3 crashed **URL:** \ **Category:** V3 SOFTWARE\ **Created:** [September 16, 2026, 12:48pm UTC](https://community.ecumaster.com/t/emu-classic-v3-crashed/6513 "2026-09-16T12:48:54Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![christoph.vrt](https://avatars.discourse-cdn.com/v4/letter/c/46a35a/32.png) [@christoph.vrt](https://community.ecumaster.com/u/christoph.vrt)\ **Post date:** [September 16, 2026, 12:48pm UTC](https://community.ecumaster.com/t/emu-classic-v3-crashed/6513/1 "2026-09-16T12:48:55Z")
Hello, i updated my running old Classic from 0.67 to 0.68 V3 with unplugged Coils, after reconnecting the car synchronized, but it doesn´t start anymore. I turned off Ignition to restart again, my PC lost connection to the software and the software became very laggy. The connection USB sound is audible, but still no connection. I also bridged TX and RX with turning on ignition, nothing. What can i do now? ---
**Author:** ![Jadzwin\_ECUMASTER](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/jadzwin_ecumaster/32/28_2.png) [@Jadzwin\_ECUMASTER](https://community.ecumaster.com/u/Jadzwin_ECUMASTER)\ **Post date:** [September 16, 2026, 3:00pm UTC](https://community.ecumaster.com/t/emu-classic-v3-crashed/6513/2 "2026-09-16T15:00:19Z")
Did you restart your PC ? ---
**Author:** ![christoph.vrt](https://avatars.discourse-cdn.com/v4/letter/c/46a35a/32.png) [@christoph.vrt](https://community.ecumaster.com/u/christoph.vrt)\ **Post date:** [September 16, 2026, 3:38pm UTC](https://community.ecumaster.com/t/emu-classic-v3-crashed/6513/3 "2026-09-16T15:38:55Z")
Yes, i also installed the driver and the Software new, nothing changed. ---
**Author:** ![Jadzwin\_ECUMASTER](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/jadzwin_ecumaster/32/28_2.png) [@Jadzwin\_ECUMASTER](https://community.ecumaster.com/u/Jadzwin_ECUMASTER)\ **Post date:** [September 16, 2026, 6:28pm UTC](https://community.ecumaster.com/t/emu-classic-v3-crashed/6513/4 "2026-09-16T18:28:16Z")
Do like that. Short rx / tx in circular connector, then power up ECU (with tx /rx shorted). Then start emu v3 client. There should be message that ecu is in bootloader mode and software ask you for the upgrade. ---
**Author:** ![christoph.vrt](https://avatars.discourse-cdn.com/v4/letter/c/46a35a/32.png) [@christoph.vrt](https://community.ecumaster.com/u/christoph.vrt)\ **Post date:** [September 16, 2026, 7:19pm UTC](https://community.ecumaster.com/t/emu-classic-v3-crashed/6513/5 "2026-09-16T19:19:43Z")
i already tried. it didnt work, the software became very laggy, the connection field is flashing in different distances and i cant really go through the menu because it is so laggy. i also tried it over 10 minutes out of the car only with 12+ and - with rx/tx nothing happend. ---
**Author:** ![Jadzwin\_ECUMASTER](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/jadzwin_ecumaster/32/28_2.png) [@Jadzwin\_ECUMASTER](https://community.ecumaster.com/u/Jadzwin_ECUMASTER)\ **Post date:** [September 16, 2026, 9:38pm UTC](https://community.ecumaster.com/t/emu-classic-v3-crashed/6513/6 "2026-09-16T21:38:05Z")
Are you sure you short proper pins (tx and rx). It forces ECU to go to bootloader. ---
**Author:** ![Jadzwin\_ECUMASTER](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/jadzwin_ecumaster/32/28_2.png) [@Jadzwin\_ECUMASTER](https://community.ecumaster.com/u/Jadzwin_ECUMASTER)\ **Post date:** [September 16, 2026, 9:39pm UTC](https://community.ecumaster.com/t/emu-classic-v3-crashed/6513/7 "2026-09-16T21:39:11Z")
Aslo could you please send me your base map that you had for 0.67 version ([info@ecumaster.com](mailto:info@ecumaster.com)) ? I will try to reproduce it on the table ---
**Author:** ![christoph.vrt](https://avatars.discourse-cdn.com/v4/letter/c/46a35a/32.png) [@christoph.vrt](https://community.ecumaster.com/u/christoph.vrt)\ **Post date:** [September 18, 2026, 7:02am UTC](https://community.ecumaster.com/t/emu-classic-v3-crashed/6513/8 "2026-09-18T07:02:13Z")
Yes i shorted TX and RX twice. I send the map to you. ---
**Author:** ![Jadzwin\_ECUMASTER](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/jadzwin_ecumaster/32/28_2.png) [@Jadzwin\_ECUMASTER](https://community.ecumaster.com/u/Jadzwin_ECUMASTER)\ **Post date:** [September 18, 2026, 1:39pm UTC](https://community.ecumaster.com/t/emu-classic-v3-crashed/6513/9 "2026-09-18T13:39:36Z")
I got it. I will let you now if I can reproduce it. Otherwise if I cant reproduce it and find soulution, you need to send the ECU back to us to check what is the problem. ---
**Author:** ![christoph.vrt](https://avatars.discourse-cdn.com/v4/letter/c/46a35a/32.png) [@christoph.vrt](https://community.ecumaster.com/u/christoph.vrt)\ **Post date:** [September 24, 2026, 7:49am UTC](https://community.ecumaster.com/t/emu-classic-v3-crashed/6513/10 "2026-09-24T07:49:58Z")
Hi, Do you have some new Information for me? ---
**Author:** ![Jadzwin\_ECUMASTER](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/jadzwin_ecumaster/32/28_2.png) [@Jadzwin\_ECUMASTER](https://community.ecumaster.com/u/Jadzwin_ECUMASTER)\ **Post date:** [September 24, 2026, 10:32pm UTC](https://community.ecumaster.com/t/emu-classic-v3-crashed/6513/11 "2026-09-24T22:32:25Z")
Yes, I made several upgrades from 3.067 to 3.068 and all works like expected. Something unusual had to happen. ---
**Author:** ![christoph.vrt](https://avatars.discourse-cdn.com/v4/letter/c/46a35a/32.png) [@christoph.vrt](https://community.ecumaster.com/u/christoph.vrt)\ **Post date:** [September 25, 2026, 7:10am UTC](https://community.ecumaster.com/t/emu-classic-v3-crashed/6513/12 "2026-09-25T07:10:52Z")
Can i send you the emu? ---
**Author:** ![Jadzwin\_ECUMASTER](https://dub1.discourse-cdn.com/flex013/user_avatar/community.ecumaster.com/jadzwin_ecumaster/32/28_2.png) [@Jadzwin\_ECUMASTER](https://community.ecumaster.com/u/Jadzwin_ECUMASTER)\ **Post date:** [September 25, 2026, 3:30pm UTC](https://community.ecumaster.com/t/emu-classic-v3-crashed/6513/13 "2026-09-25T15:30:06Z")
I sent you an email with the details.