3rzfe spurterring at 2k

I have a freshly rebuild 2.7 that sputters bad at 2k-25k Rpms. I pulled the plugs and they were white I'm guessing running lean. No check engine light. Got New maf, plugs, air idle control valve. Please help.

 

Spark plug wires?

 

I changed the wires already. Could it be an o2 sensor? I have no idea what it could be.

 

Take it to a dealer and have them plug it in. Yes, it will cost you but it will be a lot cheaper than replacing parts without knowing what the problem really is. Many local mechanics can do the same thing and even Autozone can plug into it and at least give you an idea what system is screwed up.