I noticed in my factory tune for a s/c 2.4L twin cam engine that GM has it wanting the afr at 13.50. Is there any way to change that to 14.70? Also, I have the high rpm tables and low rpm tables done in open loop and the car runs great, once it goes into closed loop, it will throw lean codes and run horrible. Is it because the pcm wants at 13.50 and it is set for 14.7?
Change it to 14.7 and kiss your motor bye bye. Stoich is the hottest mixture and will literally melt stuff if you run it there. 13.5 is more than sufficient. Your car shouldn't be commanding 13.5 in closed loop (Closed loop is anything but WOT). It should be searching for 14.7 roughly.
RSG Offroad
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