# Recent map writing issue **URL:** \ **Category:** EMU BLACK / CLASSIC\ **Created:** [January 1, 2026, 9:45pm UTC](https://community.ecumaster.com/t/recent-map-writing-issue/4991 "2026-01-01T21:45:33Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Fractional](https://avatars.discourse-cdn.com/v4/letter/f/49beb7/32.png) [@Fractional](https://community.ecumaster.com/u/Fractional)\ **Post date:** [January 1, 2026, 9:45pm UTC](https://community.ecumaster.com/t/recent-map-writing-issue/4991/1 "2026-01-01T21:45:33Z")
Hi all, Recently, as of a few weeks ago, the client will ask me to “use data from EMU or write new map” while cranking. Used to be that I would get asked that upon connecting and bringing up the client only. Now it asks for it as i load up AND, a second time while cranking. Not sure what to make of it. Any ideas? Edit: ive been enjoying v3 ---
**Author:** ![noobtuner](https://avatars.discourse-cdn.com/v4/letter/n/e274bd/32.png) [@noobtuner](https://community.ecumaster.com/u/noobtuner)\ **Post date:** [January 2, 2026, 5:53am UTC](https://community.ecumaster.com/t/recent-map-writing-issue/4991/2 "2026-01-02T05:53:02Z")
Have you made wiring changes? This sounds like the ECU is rebooting while cranking instead of staying powered up. Maybe put a multi-meter on the ECU power source and watch while turning the key. ---
**Author:** ![Fractional](https://avatars.discourse-cdn.com/v4/letter/f/49beb7/32.png) [@Fractional](https://community.ecumaster.com/u/Fractional)\ **Post date:** [January 11, 2026, 10:00pm UTC](https://community.ecumaster.com/t/recent-map-writing-issue/4991/3 "2026-01-11T22:00:47Z")
I have not. Its weird. Ill have to check wiring to see if anythings loose at the connector or whatever. When i switch power it asks me ab9ut using emu data or client data. I choose emu. I start cranking qnd it asks again.