Missed your post Larry... Naaa, not yet. I wanted to see if you veterans here had some jewels of wisdom for me. I work in a giant gas plant and deal with pressures and temperatures and flows and giant compressors bla bla bla. I get used to watching for changes in the usual way things operate and this A/F thing has me kind of stumped. If it's simply a temperature issue I can accept that. If something else is going on I don't want to throw myself off until I have an idea wtf I am doing...if that is even possible...LOL I need to go for a cool-air WOT blast and see what that shows me. I may eventually reflash my original PPP tune, recreate my changes via the Predator, and see if that changes anything...but I'll do that only if I can't find anything else. I know ujokin2 is having a few heat-related 90mm TB issues so I may touch base with him and see what they are.
I don't know what they do when they go out of calibration. It could be that they get non-linear as you move away from center instead of shifting everything one way or the other. If you can do a free air calibration I'd do that first. and you work in a giant gas plant? The question would be "for a fixed volume of air, and a 30* change in temperature, would the percentage change in air density be roughly the same up here as it would be at sea level?"
LOLOL. Sure sure sure. Put me on the spot I've never really thought about that before but I assure you I will!!!