I just tried to install my LM1 wideband with the LMA2 aux input cable in my EVO. I have an AFC that I previously installed using a fields harness, its been on the car for a few months and up through this afternoon it has been working fine.

So, I wired the LM1 & LMA-2 up using the same fields harness the AFC is hooked up to. After I finished splicing all the wires for the LMA2 (RPM, TPS, IAT, Ignition & Knock) my AFC all of a sudden won't power up & my CEL came on as soon as I started the car. The code was for the MAF sensor, something like incorrect voltage so I figured I must have messed up one of the AFC connections while I was splicing the wires for the LMA-2. I disconnected all the new inputs I installed from the LMA2 and reinstalled the harness w/ just the AFC inputs but it still did not work.

As a final measure I pulled the harness off again and checked the ohms on all the connectoins w/ my multimeter, everything checked out OK so I reinstalled it once again but the AFC still doesn't work.

Does anyone have an idea why or how that could have happened?