Car boosts 1bar then drops to .6 in 5th gear

[Mrcarnage]

My restrictor has been removed from my R33 before I bought it. The aftermarket boost gauge hasn't been installed until a few days ago.

Trouble I am having:
1st gear pulls to 1bar and holds
2nd gear pulls to 1bar and holds
3rd gear pulls to 1bar and holds
4th gear pulls to 1bar and holds
5th gear pulls 1bar for less than a second then drops to .6 bar then stays at .6

after the boost drops no matter what gear I'm in the car won't boost back to 1 bar unless I turn the car off and let it sit for a few minutes.

no cel, no spikes, no leaks.

I cleaned out the solenoid and also made sure the internals of the solenoid were still intact.

I've read throughout random forums, that its the ecu going into a limp mode....? I've read has something to do with the timing?

Anyone else ever experience any issue like this?

Video attached:

http://youtu.be/6iyTF6tBU04

[nickisonfire]

Mine when i bought it never boost past 0.6bar (mecanical gauge) ive just cleaned the maf and the car start to boost 1.1 bar dont know if help but it was an r32gtr

[Mrcarnage]

Mine when i bought it never boost past 0.6bar (mecanical gauge) ive just cleaned the maf and the car start to boost 1.1 bar dont know if help but it was an r32gtr

is your restrictor removed?

[nickisonfire]

is your restrictor removed?

It was not at the time my ecu was tuned and i remove the restrictor after and it change nothing same boost level

[Skym]

Most likely the stock ECU is switching to low octane / knock maps (dropping the boost level, pulling ignition timing, running engine richer). Stock ECU can automatically switch between the non knock maps, knock maps, depending on if detects knock or not via the knock sensors (usually one front, one rear) on intake side of the engine.

One fix is to run higher octane gas and see if it solves the knock problem. Other option is retune the engine to tune out the knock.