Boost controller help needed Nissan almera 2.2dci

[Roastyduck]

Bit of a noob with turbos and stuff so I could use some wisdom, I've read loads online but still can't fathom it out. Forgive my lack of correct words used but hopefully it makes sense.

I have a bleed valve type boost controller
It's on a 2004 Nissan almera 2.2dci

I've tried connecting it to the hose going to the wastegate which is a vacuum line and boost still doesn't go above 18psi on my boost gauge.

Someone on the Nissan page said in someone else's post that on the 2.2 you need to unbolt the boost controller from one of the boost hoses and put the bleed valve line in there, I've tried that and still won't go above 18psi.

Can anyone shed some light on this?

The vacuum hose to the wastegate goes to a little box that has 3 hoses, one from the engine (vacuum pump I guess) one to the wastegate and one to the airbox.

[stevieturbo]

There's little doubt this should be more deserving of a facepalm....

But you will never gain more boost on a w/g system that relies on vacuum for it's control...if you're leaking off vacuum via a bleed valve.

If you can reduce or prevent the leaks from the OEM control system so it applies more vacuum...then you may be able to increase boost, but not indefinitely as all modern diesels use very tiny turbos.

[Roastyduck]

Shorten the actuator arm I guess is the only option then?

[Jazzy Jag]

Not a great idea

Jack up the boost pressure, then kiss your bottom end goodbye.

I've seen it several times on various makes of car and vans.

The last one was a 2.7 Merc 5cyl that a week after being "boosted" stuck a rod through the block.