I've been searching this board and others for the past few hours now, and I've turned up some good help.
So far, I'm pointing towards:
Fuel pump/filter (and/or)
Anyway, my problem is this: When going from vac to boost, my car has started stumbling (sounds like a puttering noise, with minor vibration) and power loss occurrs, untill I finally break the 2-3psi "ceiling" and then the vibrations/puttering/stumbling end and I regain my power.
More recently, the stumbling has occurred while in boost (4-8psi) on WOT, or on tip-in, and also when tapping the gas while idle.
Idle seems relatively normal, although when I increase it, I can tell there is a bit of stumble.
This has recently started occuring (within 2/3 days) and has gotten considerably more noticable/worse very quickly. I haven't modified anything recently, so i'm thinking something has just worn down/failed ^^
There is no CEL, although I have had one for an o2 sensor, and may need to recheck the connections, and reflash the saved cel ****.
Also, no WBO2
I will need to get a fuel pressure gauge, check plugs and run a few other checks, but I wanted to see where this community could point me first.
Mods: Cartech FMU, 15g TDO4, Custom FMIC, Manual Boost Controller (voodoo), MSD Miata Box, HKS SSQv BOV, 305cc Greentop Supra Injectors.
As far as I know, everything else is stock (save for unrelated IE:suspension/rear end)
Thanks again, and I wouldn't have asked if I didnt search all day with varying answers