Z32 MAF Grounding/Run lean?

[MrFairlady]

I'm trying to Diag an issue that my car is Running leaner than it should be.
SR20,Enth ECU tune,D/W 550 etc GT2860RS
the 2 Grounds on the Maf Wiring and the "ABCDEF".
-Some say to ground/Solder together into the stock SR Maf wiring(which is what I'm running).
-Some say to run a ground to the body.

Which is it?
COULD a Diff ground cause a dif reading and Run Lean?
Car is running like 15/High 16.9's @ idle (should be flat on its face) and 15's-16's cruise but when I hit 10psi 1 time it only made it to like 13's.No Bueno'!
Runs/idles Great - No Breaking up - nothing
I just don't Wanna blow it up 1st time out and can't get to a dyno ATM.

My Brand new AEM wideband though, is Mounted very far down the pipe,right up against/near the Flange for the Cat to start.Wondering if thats why is Reading Leaner than it is maybe?
Checking the Maps w/ consult - I'm actually MAXING out the MAP w/ a Z32.That Def should not be!





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theres so many diagrams and yes I've searched and everyone seems to agree on whoevers thread "thanks" or "Thats a good write up".
Not the correct or incorrect way I guess.
http://www.zilvia.net/f/tech-talk/58...f-upgrade.html

http://jimwolftechnology.com/wolfpdf...%20NISSANS.PDF

http://zilvia.net/f/tech-talk/97622-...0det-pics.html