When I am driving consistently on the highway for a while on a bumpy surface then accelerate to 4200 (vvt) my maxima goes into limp mode.
It only goes into limp mode if I hit will and has never gone into limp under 4000rpm.

Do you guys think it's a camshaft position sensor?

Note: on start up there is a big hesitation in my throttle between when I hit the gas and when it revs.

Also I should say my car is completely straight piped from manifolds back with 3" piping. And I have an intake with a nwp block off plate.

Thanks again