Why so lean on a cold start?

[infurNOS]

Go to post 9

[curtis265]

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]

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]

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

[curtis265]

You should be open loop for a cold start

[infurNOS]

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]

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.

http://i930.photobucket.com/albums/ad144/munro88/itrinjector_zpsc559c31d.png (http://s930.photobucket.com/user/munro88/media/itrinjector_zpsc559c31d.png.html)

http://littlefun.org/uploads/5217a194c856110b13000006_736.jpg

thats ignition table u looking at dude

[infurNOS]

http://littlefun.org/uploads/5217a194c856110b13000006_736.jpg

thats ignition table u looking at dude

LOL - no sh!t...

[infurNOS]

fixed, looks a bit normal. running slightly lean at idle maybe because of the mods to engine?

http://i930.photobucket.com/albums/ad144/munro88/itridle_zps90370b54.png (http://s930.photobucket.com/user/munro88/media/itridle_zps90370b54.png.html)