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/58656-z32-maf-upgrade.html

http://jimwolftechnology.com/wolfpdf/MAF%20Z32%20CONVERT%20TO%20OTHER%20NISSANS.PDF

http://zilvia.net/f/tech-talk/97622-z32-maf-install-sr20det-pics.html

[VNG704]

2 month old thread, but did you ever find out what the problem was? how did you fix it?

[MrFairlady]

Enthaply Tune (tuned for 50psi base) + D/W injectors Flow rate states on the Chart that 50psi Base Pressure = 553 (+/-) cc injectors.

MEANING basically at 43psi Stock base pressure, i was only getting like 480cc's worth.
Car Ran Like a Champion till #2 Rod Bearing Took a shit.

[VNG704]

Ran lean and lead to the rod bearing crapping on you? So then if you bumped to 50 psi, you would have been in the good? Making sure b/c I'm kinda having a similar predicament. thnx.

[MrFairlady]

Ran lean and lead to the rod bearing crapping on you? So then if you bumped to 50 psi, you would have been in the good? Making sure b/c I'm kinda having a similar predicament. thnx.

No..lean in fuel didn't cause the Bearing to go...someone before me that had this engine was a Moron and didn't take care of it.
It was Pretty Dirty Inside and Most likely didn't like to change the oil much.So It decided to "just go" 1 day.Oh well.All Getting fixed now.

50psi had my a/f's in Great shape after I adjusted it.
My injectors are Rated "550" at 49psi.Stock pressure is 43psi IIRC, and the injectors only flowed like 470 at that setting.