R33 Gtr Intermittent Power Issues

[mk33]

Freshly rebuilt rb26 with power issues, sometimes it's a animal next Time I put my foot down the car runs like there is a boost leak, turbo is labouring but no power, car is doey and pops a lot when it goes into nugget mode, Ive changed tps, cams, fuel system, turbo, intercooler, computer, exhaust manifold, exhaust system, radiator, engine, cam gears. I've noticed sometime the car is turned on blows some smoke not sure why. Any help would be appeciated as I have 500kw gtr that can run properly for one year

[Hadouken]

1) need a list of mods

2) with this list of mods I can ascertain whether you are running map or afm's

3) sounds like afm's

[Duncan]

Sounds exactly like a boost leak to me, I would start with that, particularly If the smoke is black. And a big leak, so start with the intake and cooler piping

[mk33]

Thanks guys,

List of mods:

Forged 26

Kelford 272 cams / 8.95 lift

Single precision turbo 6466

6 boost manifold

Twin tial 38mm wastegates

Haltech ecu

zeitronix wideband controller

zeitronix fuel flex e85

Fuel reg

Plazmaman fuel rail

2000cc injectors

Radium Surge tank / 3 fuel pumps

Split fire coil packs

Tomei cam gears

Standard plenum

Standard throttle body

3.5inch turbo back exhaust with no cat / no restrictions

Tomei high flow oil pump

New water pump

Extended sump

New koyo alloy radiator

100mm Plazmaman intercooler

Custom cooler piping with v band clamps on end tanks

A bit more info, I had this problem before I rebuilt the car, the car is also hard to start sometimes take a couple try's. Car is also draining electricity from somewhere the battery dies after a couple weeks.

I checked for boost leaks, initially thought it was the turbo so we changed that, then we thought it was the cams so changed that. Happy to take this car somewhere, it was built by Powertune aus they can't find the problem after 9 months with the car it's just a guessing game.

Thanks guys