Glanza boost issue

[Giannis]

As title....i am a stock ep91 glanza owner

When I push the throttle it boost fine(three lights on tacho an a lot of power and torgue) utlil 5000 5500 rpm the boost lows down (two lights on tacho and less power and torgue)

Any suggestions

Thanks

[akyakapotter]

If it's completely stock it will restrict boost in 1st and 2nd gear untill you bypass the hi low function.

Cheers nick 

[Giannis]

2 hours ago, akyakapotter said:

If it's completely stock it will restrict boost in 1st and 2nd gear untill you bypass the hi low function.

Cheers nick 

It is nothing to do with restriction....it happens to all gears

Thanks

[BMX-RIG]

Weak actuator?

[Giannis]

44 minutes ago, BMX-RIG said:

Weak actuator?

This is my first suspicion

Does a cracked manifold affects?

Thanks for reply

[Shannan Ganga]

I am currently going through this same problem, I installed a boost gauge just to be sure and it confirms that I am losing boost as soon as that last light comes off, boost drops with it. From factory its 9psi and I am getting that and just as Giannis said around 5k it drops to about 5-6psi.

Please any suggestions.