Turbo or boost fault?

[Tezmax]

Is my Turbo on its way out as when boosting up through 2nd and third i feel it loosing boost for a split second then picks up ok.

In top gear its alot more noticeable, like 50/50 boost no boost.

I have no fault codes.

Are these poorly turbo symptons or should i be be looking at other things...

Thanks for support in advance.

[rio_gti]

Possibly n75 playing up

[Tezmax]

cmon guys,
got a problem and only get one hit!

(thx Rio) wouldn't a N75 issue throw up a fault code? but will put it on the replace list.

Anymore ideas regulars?

[dom]

Is the boost spiky? As in on/off/on/off/on/off etc?

[Tezmax]

Yes, on/off 2 or three times through 2nd and third while excelerating, and even worse when in 5th?

[MoMartin]

I have this problem apart from my car throws the fault code
00575 - Intake Manifold Pressure
            08-10 - Control Limit Surpassed - Intermittent

I have replaced the n75 valve too and that didn't make any difference

[dom]

Yes, on/off 2 or three times through 2nd and third while excelerating, and even worse when in 5th?

I would guess N75 then

[brewey]

Have you services you DV? Mine did this when the standard one split.

[Tezmax]

Have you services you DV? Mine did this when the standard one split.

I have a Forge 007p which i cleaned and greased up when i first got issues but didn't make any difference.
I have a standard DV i can swap to see if it helps coz thats an easy 5min job.

Thx Brew.

[Tezmax]

Changed the N75 and swapped my recirculating valve but made no difference.

I now get next to no boost in 4th and 5th, it almost feels like its in limp mode?

Anymore ideas?

Thanks.