Bocked intake manifold causing overboost?

[mrapoc]

Hey

Just been thinking..I get limp mode when I do WOT for a bit.

This could be because a blocked intake manifold is allowing too much pressure to build up as its not getting pushed straight into the engine.

True? It could also be causing my difficulty in obtaining a decent MPG without driving like a granny?

 

[Big Tone]

Hey

Just been thinking..I get limp mode when I do WOT for a bit.

This could be because a blocked intake manifold is allowing too much pressure to build up as its not getting pushed straight into the engine.

True? It could also be causing my difficulty in obtaining a decent MPG without driving like a granny?

 

Blocked intake manifold, seriously doubt that.

Not much help in sorting it I know, codes?

[mrapoc]

Well..not totally blocked but clogged up

[scarr89]

You got a diesel? Whip it off, clean it out and see it helps. If not...then maybe a faulty N75? Mis 'controlling' boost ( I'm guessing here guys )

[Steve_PD]

Turbo

[mrapoc]

Had the turbo cleaned out by rtech end of last year 

N75 was replaced about 3 weeks ago 

Changed the map sensor too 

Its the only thing I can think of left to be fair

[scarr89]

You got a diesel right? Take the manifold off and inspect. Will take 2-3hours to clean if your competent with a socket set and have a haynes!

[mrapoc]

yeh.

ill get round to doing it sometime 

[houston]

worth doing anyway, did the intake on my dads passat 130 and couldnt believe the crap build up

[Big Tone]

If the map sensor sees more boost than requesting then wouldnt this mean that that amount of boost is actually being produced?
As you would have thought the n75 would close the wastegate slightly to prevent this, no?

Is it possible that the actuator is not set up correctly?