FiTech EFI system
Have you tried increasing the accel settings, and or changing the accel decay, for the different temp settings? or does yours not have access to accel decay that either.
I used to have the slight tipin of the accel pedal lean spikes too, but the increase in accel pump settings got rid of that
As indicated in another post, if the WOT AFR readings are going too rich after increasing the accel settings, the WOT AFR should be able to be changed to compensate ??