Rb25det idle problems

[5thgenluder]

Ok guys so long story short I need some help. I have a 71 Datsun 240z that I put an rb25det into. Here's the problem. Car idles decent until it gets warmed up. Then when I rev it up it will stumble and hunt between 400-1000rpm. Fuel pressure is steady at 43psi. Here is what I have done. So far. Recirculated the bov. Checked for vacuum leaks. Used carb cleaner searching for even minor leaks. Tried adjusting the idle set screw. I have pulled the codes from the ecu. Got code 12 at 1st which is maf. But I assume that's because I unplugged the maf at one point. Drove around the block cel came back on. Tried to pull the code and got 55 all good. Some quirky stuff that happens. If the check engine light is on and I blip the throttle it goes off then back on. Also if I remove the hose clamp from the throttle body the idle will hold steady at about 1100rpm. Here is a video I made a few days ago. I have recirculated the bov and removed the stock fpr since this video.

http://m.youtube.com/watch?v=Pt8AuViNUSE