R33 S2 has been sitting for a while, now running like a dog

[sagluren]

So Ive got a S2 R33 standard engine. Normal entry level mods. Ie. vg30 turbo, elec boost controller, Alexi power fc, fuel pressure reg and a front mount. 

My poor skyline has been sitting in the back yard for a few years while life got in the way and me finishing of a new engine for her. I’ve been starting her every few months just to keep oil moving. Anyway I have now registered her and started driving her while I rebuilt a engine for my hilux. When I first started her she ran fine took her down the servo put some fresh fuel I. Her and thought all was well. After a few days she started miss firing while coming on to boost. Now she is hard to start. Won’t rev past 3000rpm ( roughly ) when boost comes in. 

I assumed stale fuel had blocked up the fuel filter. So I changed that and put some new plugs in her. No change. 

Has anyone got any ideas? 

[GTSBoy]

AFM is probably full of cobwebs, dirt or rust.  Same with its terminals.  Fuel pump could be soft.

[sagluren]

Cheers mate. Afm is something I can sus out. I’ll put a fuel pressure gauge on it tomorrow to