So the EJ25 is throwing a P1143 code ("P1143 manufacture control fuel air metering") and I think I have the problem cause tracked down.  Any one out there have an EJ25 factory set up (preferably from a 1997 Subaru Legacy) who could help me reconnect the hoses around the MAP sensor?

Here's what I think I did wrong.  In my plan to remove "excess" from the engine, I thought I was removing the charcoal canister purge control solenoid.  I think instead that this solenoid allows the MAP sensor to read both manifold and atmospheric pressure by alternating the solenoid back and forth.  Well... I just have a MAP sensor plugged into the manifold now and its throwing a code.

I have to locate the solenoid (was planning on using it as an idle control solenoid possibly) so first I have to find it.  I also found this page that describes how it may be connected in a stock set up:

http://wac.addr.com/auto/obs/boostnanny/boostnanny.html

From these diagrams, it looks like there is a 3 port solenoid.  When I find mine, I need to know which port hooks to where (map, manifold, filter, atmosphere?).

I solved the last major code today which was a rear o2 heater malfunction.  I've been working with Tom on a simulator for a rear O2.  Well I hooked up just the heater portion of an O2 sensor (the rest was just zip tied to the rear cage), and the code has not reappeared. 

Thanks, Paul...