# Emu classic voltage surge

**URL:** <https://community.ecumaster.com/t/emu-classic-voltage-surge/4803>\
**Category:** EMU BLACK / CLASSIC\
**Created:** [November 25, 2025, 10:03pm UTC](https://community.ecumaster.com/t/emu-classic-voltage-surge/4803 "2025-11-25T22:03:37Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Rwd.Jay](https://avatars.discourse-cdn.com/v4/letter/r/96bed5/32.png) [@Rwd.Jay](https://community.ecumaster.com/u/Rwd.Jay)\
**Post date:** [November 25, 2025, 10:03pm UTC](https://community.ecumaster.com/t/emu-classic-voltage-surge/4803/1 "2025-11-25T22:03:37Z")

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I have a 1jz GTE vvti on an emu classic with the adapter harness from ecu master

The car jumps from 9v to 12v constantly I can’t find the source of the problem. The car runs perfectly and I daily it on a stock ecu. It only has an issue when I plug the classic up. [Video](file:///var/mobile/Library/SMS/Attachments/10/00/FE7E4E80-749A-4953-9A5A-576029B916CD/IMG\_9900.MOV)