Bump any updates on this?

 

You guys are all off the mark here. The throttle lag happens because Nissan in all of it's wisdom and glory programmed the throttle plate to only open 75% at full throttle and we are a drive-by-wire system. To get rid if the issue we basically have 2 options to get rid of the lag. Buy a Sprintbooster or have your car tuned with a program like Osiris that will allow the TP to open 100%.

After swapping out my rear end to a 3.5 and getting Osiris tuned, I can pound the gas at 30 MPH and break my back end free. And I drive a 5AT.

 

Get a sprintbooster. Do the maintenance first on the throttle body. I just put one in and there is a lot of difference. Instant throttle response I love it.

 

I have the same problem and I pulled the code P1283. When I turn the car on from a cold start the car will run like a bat out of hell. But once it warms up the throttle sucks again! =/ Let me know if you get yours fixed and how! Or vice versa.