# Emu classic only reading 8-9V, when harness has 12.4V **URL:** \ **Category:** EMU BLACK / CLASSIC\ **Created:** [December 13, 2025, 4:42am UTC](https://community.ecumaster.com/t/emu-classic-only-reading-8-9v-when-harness-has-12-4v/4898 "2025-12-13T04:42:22Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![npc42](https://avatars.discourse-cdn.com/v4/letter/n/8e7dd6/32.png) [@npc42](https://community.ecumaster.com/u/npc42)\ **Post date:** [December 13, 2025, 4:42am UTC](https://community.ecumaster.com/t/emu-classic-only-reading-8-9v-when-harness-has-12-4v/4898/1 "2025-12-13T04:42:22Z")
As the title states I’m having an issue with my emu classic paired to a 2JZ-GE non vvti pnp adapter. I am able to connect to the ecu under K.O.E.O, but as soon as I activate the starter or the fuel pump the ecu disconnects and often wont connect unless the battery is fully disconnected and reconnected. Its also reading a randomly spiking voltage of 8.2-9.1V even though when unplugged and checked with the multimeter i see 12.4 at the ecu power pin. I am trying to get my car to start and am at a total loss right now unfortunately. thanks in advance for any advice/tips/ideas! ---
**Author:** ![derUltraTT](https://avatars.discourse-cdn.com/v4/letter/d/ba8739/32.png) [@derUltraTT](https://community.ecumaster.com/u/derUltraTT)\ **Post date:** [December 13, 2025, 1:12pm UTC](https://community.ecumaster.com/t/emu-classic-only-reading-8-9v-when-harness-has-12-4v/4898/2 "2025-12-13T13:12:54Z")
Hi Either ur ECU or ur wiring is bad. I think more likely is the wiring. If u measure 12V without load bit doesnt mean anything. U should deeply check ur 12V supplay and ground wires. ---
**Author:** ![npc42](https://avatars.discourse-cdn.com/v4/letter/n/8e7dd6/32.png) [@npc42](https://community.ecumaster.com/u/npc42)\ **Post date:** [December 13, 2025, 8:18pm UTC](https://community.ecumaster.com/t/emu-classic-only-reading-8-9v-when-harness-has-12-4v/4898/3 "2025-12-13T20:18:02Z")
Thanks for the info, I’m planning on voltage drop testing all my grounds. And looking for any loose connections today, so I will update as I go