Datalog with huge numbers

[Illegal Vette]

I just did a datalog and some of the cells have really big numbers in them, what am I doing wrong?
19502

[Illegal Vette]

Looking a my calc.selbens I have some non linear readings with spikes, I'm wondering if my MAF because of it's non traditional installation could have anything to do with that. It's inside of this airbox in front of the throttle body.
19504

[statesman]

Your MAF readings don't look unusual to me... what does look very unusual is your equivalence ratio is reading 1 for your WOT pull in frames 3651-3681. Also, your wideband doesn't appear to be working.

[Illegal Vette]

Well shoot, I don't know what the equivalence ratio means! I will recalibrate the wide band and hope that it works. Is it possible for the null modem to be installed backwards? It'll go on either way and I always wondered if it made a difference. Thanks for your help, I'm finding it to be a challenge understanding all of this.