So I was wiring my aem wideband into the stock ecu so that I could easily log it in evoscan. Unfortunately, i'm an idiot and accidently wired it into pin26 on a evo9 which is the rear o2 heater control. Ever since then I have a problem with the car idling really lean sometimes (16.x af ratio) and my knock sensor is now giving me 8-10 counts of knock just cruising without any boost at 2500rpm on up. Did I blow a portion of my ecu up?? Please help this moron out. The rear o2 simulator in tephra v7 is enabled. Does anyone have a schematic of the stock ecu?

Thanks

 

pin out is here

http://evoecu.logic.net/wiki/USDM_IX_ECU_Pinout

you want pin 73...how did you get 26 instead?

 

I got color wires mixed up like an idiot. Its hooked up and functioning correctly now... However I think the ECU may be damaged in one part of it.

 

Okay, just to confirm I am an idiot I finally figured out all that was going on.

Me wiring the wideband had no effect on blown fuses or damage to the ecu. This entire time it was because the knock sensor was disconnected (not plugged into harness). I accidentally removed its connection to the harness while removing all the EGR related stuff behind the intake manifold. I even bought a new ECU locally, thinking it was the ECU. I guess you should always check the easy stuff first, lesson learned.

 

how did unplugged knock sensor count knocks ?

 

Guessing the Knock filters in te ecu expect a certain voltage and if it doesn't get it, it registers as knock. All I can guess.