I have been working hard on re-tuning my 94 383 LT1 using EEhack and tunerpro and at this point am pretty happy with the results. I do have one issue I dont understand however. When I first start the vehicle, when it is cold, before it goes into closed loop, it runs very lean according to my wideband. Like 18 to 1 lean, in spite of the fact the open loop AFR is set to around 14:1. However once the 02 sensors start working, and I log it, all of my trims are within 2 to 4%. What tables can I utilize to try to fix this issue?
Thanks
Roy