Did some datalogging and have some questions

The low load could also be caused by running lean for any other reason like low fuel pressure at WOT. It could also be from having some kind of mechanical problem with the engine (I doubt it).
 
Hmm.. well maybe I'll do a fuel pressure test before I go off buying a new MAF then. I've been suspecting that my fuel pump is weak anyways, I don't think it's ever been replaced and the car has 114k miles on it.
 
I logged the fuel pump flow rate a couple months ago when I did some WOT runs, would you be able to tell if the fuel pump isn't running up to par by that?

Here's that log if anyone wants to look at it. It's a lot longer than the other two.
 
So I recently got a fuel pressure gauge and hooked it up to the schrader valve, and I've come up with some not so normal readings.

I get around 24-25 psi at idle with vacuum, about 31-32 psi without. Here's what I thought was weird though: when I turn the car off, the pressure slowly climbs to about 32 psi. I didn't think it was supposed to do that?

I haven't got a chance to test the pressure under load yet, I'm waiting for the correct fittings to come in.
 
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