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16:1 afr in power enrichment mode

copperpacecar

copperpacecar

SexyStudmuffin
just as the title states...i have my pcm tuned to a afr of 11.3:1 in power enrichment mode and after dropping a new motor in my afr has gone crazy and pegged my wideband. even the normal vehicles o2 sensor is reading lean in power enrichemnt. i just swapped out my high compression na block for a regular supercharded gen 3 block and now im having this problem. what could cause this?
 


yes...same kinda gen v supercharger just a new one with better rotors is all thats different. i was wondering why when i floored it it felt like it was lame in power enrichemnt mode and assumed a bad boost controller so i swapped it with no difference. thats when i saw that afr was massively out of wack...my duty cylce on my fuel injectors also never went over 14%...granted i have 65lbs injectors but this doesnt seem right to me
 
Wait, has the car been tuned before or after the motor swap? Me going from an L67 to a L26 threw my old tune way out of whack.
 
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