choking/fluttering

[crooser]

hi all

i get this strange "choking/fluttering" feeling between approx 4500 and 6000rpm with my rb25det.

under and over this range the car feels strong as normal.

at 6000, it comes good again with a noticable increase in power.

First i thought it might just be the factory boost solenoid doing its thing because of the change at 6000 but now thats been disconnected - no change.

happens at standard and slightly raised (9psi) boost. same deal.

only mods are 3" cat back exhaust.

standard ecu/afm etc

i recently changed plugs to NGK PFR6A-11 ones re-gapped to 0.70mm

could this be my problem, too small a gap?

help!

[nismoman18]

is it manual tranny? my NA R33 does that too when i slip into the 3rd or 4th with lightning speed, the engine flutters abit then off it goes. i was wondering if it had anything to do with the gearbox because it doesnt happen in any other gearbox. i guess it could also be me dropping the clutch with no accel. resulting in a bouncy effect. Its more annoying then worrying