This has me stumped. I am pretty confident that I don't have a boost or vacuum leak. I have also check tightened header bolts, up pipe to turbo and turbo to dump bolts. All seem good.

Three ideas...both of the ebcs could be faulty so that mine and the spare that I used to test with may have hidden the issue. My ECU may have a new fault with boost control or the map used to to start the car which had allowances for TGV delete, air pump delete, ID1000 and GTX3076 may have a corrupt setting somewhere.

Might be time to put it on a dyno?

__________________
Bye bye betty blue. Hello F6.

That won't tell me what is causing the issue unless we can hear boost or exhaust leaks. And I have had those both checked.

I am almost at the point of wanting to hand the car over to my mechanic and say fault find and tune it.

So what boost does it make now with the boost solenoid bypassed?

__________________
[CENTER][SIGPIC][/SIGPIC][/CENTER]
[CENTER][COLOR=#ff0000]Built Ej207: Semi-closed RA Cases - Wiseco Forgies - Manley rods - BC 272 cams - GDA Heads - billet f/whl - Vi-pec - WbO2 - 800cc Yellow tops - TD05-20G - 409Hp ath @ 1.75bar on E85[/COLOR][/CENTER]

The solenoid is not bypassed. I temporarily disconnected the pressure feed to the actuator and it hit 15 psi on a part throttle. This was beyond gate spring pressure so was all that I needed to test to.

I thought that it may have been the solenoid but swapping in a different solenoid didn't change the boosting.

intake issue? on the dyno was able to watch it while it was under full load it was collapsing could be an option to look into

Bypassing the wastegate wouldn't have made a difference if that was the cause. Plus I have an intake pipes that has an aluminum mid section.

ah yep missed that post so solenoid issue then?

I installed another grimmspeed three port ebcs and it did the same things. It could be possible that both units were broken as the other ebcs was also second hand.

Do you have any way to access your duty cycle graph save it and try adjust it up or down and see if it changes

using the Perth-WRX mobile app