Celica st205 afr?

Snake19888

New member
Hello, does anyone have a afr wideband gauge in his st205 with oem ecu?
Im interested in the afr under boost under 4000rpm (2500-4000 with boost) and over 4000rpm.. in 3rd or 4th gear.

My issue is that i have a afe from 13.1/13.5afr under 4000Rpm with full boost and after 4000rpm a 11.1afe and i dont know if that is normal or what the problem can be if not normal.. map sensor is it not because i changed it already..
 

aus jd 2703

New member
doesnt sound abnormal, you can run almost stoich AFR's to a few psi, then you need to run rich to be safe.

rpm isnt a great indicator, boost is the concern if you had 5-10psi and 13:1 i would be a little concerned.

ideal power afrs are around 12-12.5 so 13 isnt that bad. 11 is really rich (typical of Toyota).
14:1 to 16:1 is normal for idle cruise etc when no boost is present
 

Snake19888

New member
Thank you so much. My is the same so its normal.
I was only confused because on my gen2 it was completly different. Tjere o have 12.5afr at the moment where boost cames al the time. But how i see on a gen3 its not the same so i was confused :)
 
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