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Runing lean problem

pretty sure the n* you use the lower port on the TB to the pcv. im going off pics ive seen where others had the same issue. theres a few other threads with pics that cover it.
 


Fuel pressure good?
Clogged/lazy injectors?
Leaking exhaust gasket?
Fuel filter (this would have the most effect under high load)?
 
Changed fuel filter, got new exhaust gaskets and plugged the pcv house were it goes and removed the oil cap breather and it seams to be doing better. It still throws a lean code like every other day tho? I dont understand. When i look at my fuel tables short term would be normal and long term will be crazy numbers like 18s all across. And then it will switch short will be 18s and long will be normal.
 
Anyone here know what else to look into. I did some tuning today got the right maf tables in for the n* body. But im still seeing crazy numbers on short and long term fuel tables
 


What i dont get is way it switches from long term to short term sometimes my long will be fine and the short one is at 16s then when i scan agian later that day it switches to my short being bad
 
Ok. Looks like ill have to get my car smoke tested to find a leak if there is one ive done everything i can to find a lean and found nothing then went with the tune to see if it was the issue and still cant find anything. Thanks Scotty
 
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