Hondata

- what vehicle you have - Fiat X1/9 with K20A3 from a 2003 RSX
- serial number of your K-Pro: 51894
- version of software being used (from Help, About): 4.4.3.0
- ECU part number (starts with 37820) and serial number (the number under the part number) 37820-PND-A06, 2062-602363

Hello,

This is my first swap, and I was hoping that someone could kindly look at my calibration and log and give me a tip as to where to look.
The car is a Fiat X1/9 with a K20A3, type-S intake, custom exhaust with single O2 sensor.

The problem:
The car fires right up but is idling roughly around 1200 rpm. It is blowing out a ton of gray, foul-smelling smoke that is stinking up the house and making my wife unhappy.
I'm not getting any MIL errors. I notice that the AF is stuck at 10.7. I've tried 2 different O2 sensors (Denso 234-9005). I've tried both open loop and closed loop with the same result (open loop runs even more roughly).
The wiring to the ECU is custom, so it is entirely possible that I messed up, but I have checked it numerous times and all seems correct.

Again, any hints by looking at the calibration and log would be greatly appreciated.

Be well.

The datalog is only 22 seconds long and the engine is completely cold. Really can't tell a whole lot from just that.

Even in those 20 seconds it's filling up the garage with thick smoke - not safe to leave it on for longer.
Do you see anything obvious (e.g. the AF means O2 sensor not working, or the MAP is not reading an accurate number)?
I can put it outside and let it run for a while tomorrow, but it's clearly way out of spec by how roughly and inefficiently it's running even when cold.

It could be a mechanical issue, fuel issue, blown head gasket...Not something that can easily be diagnosed form just a datalog or description.

Okay, thanks. Odd as everything is brand new and the engine was just rebuilt. The O2 sensor readings don't make sense. I'll figure it out eventually.
Cheers.