Afr?
 

Is a 13.8 AFR good or ok or ?
I have headers,cat delete, catback,CAI,weapon-r intake manifold,crank pulley.BTW i just installed AEM wideband.

it's not bad but at WOT it should be closer to 13.0

Any NA AFR's to compare?

Its too lean IMO. Hopefully youre running 93oct to save yourself from detonation.
You need a tune.

for a quick fit could i change plugs or use smaller gap plugs?

bump!!!!!!!!!!!!!!

i agree that he should be running 93 octane, but i believe proper afr at idle for the L15 is between 14.7 and 15.3. close to 13.0-13.5 at wot.

where did you install the o2 sensor on your test pipe?

its about 16 or 17in and yes on the downpipe

sorry, i meant is it at 10'clock or 2'oclock? because if it is at a bad angle, the o2 sensor will go bad very quickly and read extremely rich before they die.

also, sometimes if my fit idles for a long time, it will show its idling around 13.

at 2'oclock

well, if it keeps idling at 13, take it to a tuner and have them put a sniffer to your exhaust to see how accurate your wideband is.also, did you ever install an o2 fix to your testpipe for your stock o2 sensor?
i wouldnt see this as an immediate problem, but if you keep idling rich, it could lead to more problems down the road.

it idles at 15 flat its the WOT running lean that im having trouble with

ahh dude, you are all good then. 13.0 for an na engine that hasnt had any timing change is all good.

ive seen it go to 13.8 up to 14.1

its fine dude, i had the same anxiety with my car when i put my wideband in. i thought it ran super lean but when i got my service manual, it set all my worries aside. our cars just run lean. its the nature of the beast.

Thats at WOT

could i put the afr sensor next to the 02 or at the same length as the 02

is your car throwing a CEL?

if the stock o2 sensors are forcing a code then the fit will throw itself into a preset open loop mode. its not quite limp mode though.

at least that is how i understand it to work but i could be wrong.

no I actually never had a cel light come on,but I just want to know if 13.8 to 14.1 is lean rich or normal

for NA fit, that's not lean...