Just like the title says guys, I've been having a sort of little hesitation when I reach 6k rpm. Its like it does not want to go all the way to 7k, but its like a split second. then it will still continue to go up. Anybody knows what's causing it or have experienced and solved the problem? I am thinking that I probably need to replace my wires or needed a tune-up(I just replace the plugs by the way). Need help guys.

ive seen on some cars, it could be the spark plug gapping or are you running a piggyback? if u have a piggyback, it could be a 'fail save mode'.
but im no mechanic. im just saying what i think it could be.

i have the same problem i was told its my knock sensor but then again idk much about nissans i do haVe my check egine light its one of the problems that came up i took the black canister of my motor and ran a hose str8 from the valve cover to the block and it picks up a bit better but still kinda does it ill keep checking this thred for info or pm me if you figure it out ill do the same

For my car, the hesitation under WOT was due to a dirty MAF.

Thanks guys for the advise and help. these past months also i was experiencing a static noise off my sound system. I went back to the place where i got my car re-wired. The main installer there said that I might be having a little electrical problem due low on power. He did install a noise filter, made the static to be not so obvious. He has the feeling that I need to replace my plug wires and the plugs as well.

@K20 what's a piggyback?LOL

A piggy back ecu takes signals from your sensors and modifies them to trick your ecu into reading a different value.
is sorta like a stand alone. but again, im no master at cars lol