5k rmp stutter

[MOTORSR20]

i have a red top sr20det mostly stock and im haveing a stutter at 4300 rpm to 5800 rpms it only occurs under load in 2nd,3rd,4th,5th gears i have a walburo fuel pump with stock regulator and i still have stock ecu.... plugs are gaped right..... idk where eles to go but to the coils any other ideas

[compactfean]

Haha! That is the same problem I just got done diagnosing! There is a whole list of stuff I did toget rid of my high rpm under load stuttering. Please look at "fuel or spark I need the pros on this one" title. If you go there and have any questions ill guide you through any of it. The main thing that finally solved my problem was because the z32 maf. Didn't have a screen witch caused turbulence in the maf but there were a lot of other things I found along the way that helped each time.