AEM wbo2 lean at idle rich at WOT

[2GEEZEY]

I just installed my aem wideband, at idle im getting ---, and at wot, its in the 11's and 10's.


Mods:
14b, stock boost
walbro 255
fuel labs afpr
fmic
intake

ideas?

 

[blackhawkgsx]

Check ignition wires plugs etc. does it run right at all? I have seen some cars run slightly leaner at idle My car had 18 at idle but i have since then put new plugs and a Coil on plug kit and now i idle at 15.6-16.1

 

[turboglenn]

your title is backwards... 10 and 11 are rich, and "---" is lean

thta's how it should be, but now you need to tune the car so these AFR's are in the exact areas they need to be (14.7 or so at idle and cruise and 11.5 or so on pump gas at WOT, and if you have racegas or e85 you want 12.5 or so at WOT)

 

[2GEEZEY]

i thought --- was rich? like when it gets into red?

yeah the car runs perfectley fine

whoops, then yeah im running rich at cruise and WOT and lean at idle.

 

[turboglenn]

nah, 10 is as rich as the AEM WB reads, and the dashes are once it gets past i think 18:1 on the lean side... lower numbers are richer and higher are leaner

If you drive and let offthe gas while in gear the gauge should go to the three dashes ("---") because the deceleration fuel cut is in effect and the car is pumping only air and since for whatever reason AEM decided to limi the meter's range we get to see "---" instead of say 25:1 where my other "lab grade" unit reads (lab grade 10 years ago and 800 bucks )

AS FOR YOUR AFR"S... since you have no management and it's lean beyond correction the only thing i can think to have ya do is to check the fuel pressure..It might be too low and causing your lean reading at idle (the car will run super rich stock anyway and should peg a AEM WB02 out at 10:1 anytime you're WOT.... back to the fuel pressure, if it's not already at ~42.5 i would raise it up to there or to where the afr's strat bouncing around the 14.7 range at idle (as long as you don't have a vacum hose off or anything causing this)