I had the HS headers installed the other day and I hear an exhaust leak, I think it is coming from the rear exhaust manifold because it was really hard to reach some of the bolts from the bottom of the engine. So now I want to pull the intake manifold and tighten them down.

Do I need to relieve the fuel pressure to move the Intake?

I have the Haynes FSM however it only shows how to remove from 95-99 maximas... I know it is similar, I just like exact directions.

I am asking here because I know a lot of you guys have replaced your intake manifold with the 00' VI.

 

No, the injectors/fuel rail are part of the Lower IM not the Upper.