RB25 problemo

[DR-33EfrenPR]

Hey guys a few weeks ago when my car finally arrived to Italy it started to sputter at high revs between 5-6k and then slowly got worse and worse now it'll run fine for 5 min then start sputter while i'm just cruising and I'm having to press the clutch gas it a bit and it'll be fine for a few then it starts all over again... at first I thought it was the fuel filter so after a few days of looking online for someone that would ship to italy I got it and I swaped it out and nothing I cleaned the MAF and nothing changed the sparkplugs and nothing so now I'm wondering what it could be. I just moved to Italy from the UK (I'm in the U.S. Air Force) and I don't know any other skyline owners around the area. any help would be great for now this is my daily driver and don't want it to get f***ed up, thanks!

[OutToWinPAHC]

I would unplug the injectors 1 by 1 and see if there is a change. I would also try a fresh maf or maybe an o2 sensor.

[DR-33EfrenPR]

I'm looking to get a new maf, would it be worth it to get a wideband kit with a new o2 sensor? right now it just has a narrowband and it's showing rich as hell but I don't trust that thing.

[millerrb]

Sounds like its loading up. Or going the other way and running out of fuel. Check the fuel pressure regulator. Also see if fuel is leaking into the vacuum line. Seems fuel related

[S13Gene]

Sounds like you got yourself a boost leak

[DR-33EfrenPR]

Damn I've heard about 6 or 7 different answers so far... I heard that the coilpacks would be the most common reason for that and on my air/fuel gauge it's going rich and then stalls but it'll only do it on gear once it's neutral it'll rev and boost completely fine and but then when i'm on idle the revs would start jumping between 200 and 1200... any reason why it would do that? I think if it was a boost leak it would do it all the time?