1985 Toyota MR2 K24A2 Engine Swap - BAT Voltage Fluctuations

[WolfStar]

Hello,

I have a 1985 Toyota MR2 AW11. Over the past year or so I've installed a K24A2 in place of the stock 4AGE.

I'm using Kpro V4 with the Rywire Budget Kswap Engine Harness. I got the Hux Racing DIY harness. I believe the relays come wired from Hybrid Racing.

https://www.huxracing.com/online-store/ ... p117206595

The vehicle runs but I've been chasing some voltage fluctuations in the BAT signal in Kpro.

They oscillate from 11.1 to 13.3V. Vehicle seems to idle okay but I think this is not normal.

Attached is some photos of the fluctuations. Also attached is photos of the powers and grounds. If anyone can see anything out of place, let me know.

[WolfStar]

More photos

[WolfStar]

Oh and motor is stock from a 2006 Acura TSX.

[TTR]

It's probably where the swap harness is getting power from. I have seen this so many times on swap harnesses. If you want to be sure run Ig1 and Ig2 ecu power as close to the ignition switch as you can eliminating as many connections as you can.