S14 Sr20 Ran Beautiful after retune. Now runs LEAN!

[ghudson]

Let me start out with the info.

I just rebuilt my s14 sr20 and went to crank it up and a crazy amount of fuel would dump into the combustion cambers and flood my sr out immidiatly. The ecu was "said to be tuned" for this setup (550cc's, z32 maf, gt2860rs, fmic exhaust...) My setup consists of:

550cc's
z32 maf
gt2860rs
fmic
3'' exhaust
wiseco pistons
cosworth hg
arp's

So I wittled it down to the tune after checking all voltages(maf,tps) both at the sensors and the ecu (checked ect resistance at the sensor and ecu also)

I then proceeded to get Jason at e-mance to retune this bogus ecu and got the ecu back at WALA! The car started and ran AWESOME. AFR's were 14.5-15.0 idle, and 12.5 wot for the whole night. It was doing perfect! (I did overheat that day because my fan stopped working on my drive but i fixed it immidiatly and then went on to cruise the rest of the night with great AFR's)

Next day slowly the idle AFR's becae more lean (17.0-18.0) and the same with wot. I barley got into boost and let off due to the dangerously lean fuel mixtures.

Went on to check everything again timing, maf, tps, ect... And found out my pcv valve was allowing manifold vacuum to suck from the valve cover. That explained the lower and bouncing vacuum reading on my vac/boost gauge. The AFR turned to 14.7 now and it idles AWESOME. My problem is now the thing leans out horribly during wot (16.0-17.0) I dont have the pcv valve yet but i have blocked off the pcv valve hose off the manifold and I am just letting the valve cover breath to atmoshpere with no pcv valve.

I have looked at fuel pressure static and wot (45psi/55psi). I have looked at fuel pump volatge(12.6v). I have looked for exhaust leaks before the wideband o2 sensor. I checked the plugs and you can tell they were rich for a while but now they are slowly turning white (typical for running lean). I am so lost right now, I want to make myself believe that the fuel injector pulsewidth is off right now during wot-aka bad tune Its almost like the computer adapted/learned horribly and changed the injector pulsewidth within a day or so of running the car which seems IMPOSSIBLE!!!!

Any advice/questions will be appricated.