Why so lean on a cold start?

**infurNOS** · 24-10-2014 05:28 PM

Go to post 9

**curtis265** · 24-10-2014 05:47 PM

i'm no tuning expert but - what's your post start enrichment %?

and how accurate is an o2 sensor when it's cold?

Does it smell rich?

**infurNOS** · 24-10-2014 05:57 PM

Originally Posted by curtis265

i'm no tuning expert but - what's your post start enrichment %?

I have no idea, didnt check

and how accurate is an o2 sensor when it's cold?

probably not a lot, esp since I am not using wideband

Does it smell rich?

After I turn car off, yes,

**infurNOS** · 24-10-2014 06:12 PM

Am i suppose to disable closed loop to get more accurate reading?

**curtis265** · 24-10-2014 06:20 PM

You should be open loop for a cold start

**infurNOS** · 24-10-2014 06:24 PM

I want to drive the car to make sure no CELs appear at all before the dyno, but not sure if it is safe with that AFR. Dont why it is doing it as I am running a stock ITR basemap

**mocchi** · 24-10-2014 06:49 PM

Originally Posted by infurNOS

Hi

Can anyone tell me why I am running so lean on a cold start? Just got my S300 and wanted to make sure no CEL's appear etc before dyno time (hence why I had to disable barometric pressure sensor and injector error) and noticed my AFR in the 30's.

Stock ITR base map for stock ITR with I/H/E.

thats ignition table u looking at dude