Throw an o-scope probe on there and it should be really obvious which is which. Sounds like Nissan swapped out the teal and black wires, and you're reading the diagram backwards, but who knows. If the yellow comes up at +12v, it's definitely worth plugging in your oscilloscope.

MAF signal should vary with RPM right? While IAT signal should be fairly stable while not at idle?

I can't get a meter on the harnesses with them plugged in, I don't want to strip any wires yet

Here's the info had from probing the harnesses, ignition on, MAF's unplugged

Pass side

Pin 2 (yellow) - 12v
Pin 3 (green) - Signal from sensor to dme
Pin 4 (teal) - Signal from sensor to dme
Pin 5 (pink) - 5v from dme
Pin 6 (black) - Ground

Driver side

Pin 2 (grey) - 12v
Pin 3 (yellow) - Signal from sensor to dme
Pin 4 (brown) - Signal from sensor to dme
Pin 5 (green) - 5v from dme
Pin 6 (black) - Ground

Bridged the IAT and MAF +'s, using the signal from the passenger side (lower reading) MAF. First starting the car, the a/f's seem much better than previously, now around 14.6-15.5 sweeping at idle

holy god.. i just read this entire thread. all i can say is im glad your sticking with it and it will be all worth it in the end. to the rest of you.. there are some very technical and knowledge based people on here. with all of this info.. this setup has to end up working soon.

best of luck man. im in for updates.

At this point, why not just go standalone and MAP metering. Then the piping won't matter.

There's no standalone currently available for the 370Z. Even if there was, that's another $2k minimum.

this is true, but you are pretty much baller :)

actually I am suprised we don't have a full stand alone yet..

Just subscribed. Remember Chris Columbus was looking for India when he found America. Thats supposed to be encouraging.

Very impressed and good luck man.

Doesn't UPREV allow you to switch to MAP sensors as opposed to MAF sensors? That would probably be the way to go, especially if you are running higher boost.....

I will be exploring this as well

Read all 40+ pages, very cool indeed. I am glad 98intrigue is sticking to it and I am sure he will get it working.

I had a friend of mine took the ech and somehow rewired the harness to work on the 370z harness but yea that would be a whole other animal to deal with. stillen manifold will end all the bs lol.

Why are you surprised?

MAP sensors run on 0-5v just as the MAF's do. You could most likely remove the MAF's and replace them with MAP on the stock ECU and with the proper tune it should work. You'd have to add a separate IAT sensor (also 0-5v) as well

Signal is probably coded differently though....not sure though.