Hi buddy, cheers.
'Pierburg electro-vacum valve'
Is this the next part down along the blue vaccum hose? We think there may have been a leak here, but when disconnecting pipes and pressure testing them, it snapped the plastic straight off this valve... so will be replacing it anyway to see what happens.
Silly question but what is the purpose of that valve?
Ah, do what I suggested, not some silly things...
Let's go again from the start.
This is shematics of the way VGT works:
- vacuum pump makes vacum in vacuum reservoir
- ECU operates VGT selenoid (Pierburg VGT electro-vacuum valve)
- VGT selenoid opens/closes, and vacuum operates VGT actuator on turbo
So, you have no power below 3000rpm (that means your VGT is always in high revs position), in that case:
- either some of the vacuum hoses has cracked and you are loosing vacuum (I told you to check hoses, and to check if VGT actuator on turbo moves when you start the engine) ?
- either VGT selenoid (Pierburg VGT electro-vacum valve) is faulty and does not open when it should (have you done the diagnostics) ?
- either VGT vanes inside the turbo are jammed (have you tried to manualy opetare VGT actuator on turbo) ?