is this usual behaviour from the S2????

[prj]

Did he get the new turbo fitted but no remap and reaching 2 bar overboost, right?

Read the entire thread.
It started after exhaust was changed and everything was taken apart - then not put back together properly.

Stop thinking everything is the fault of the ECU. 99% of cases it is not.
There is a simple mechanical error here.

[driftin jo]

Read the entire thread.
It started after exhaust was changed and everything was taken apart - then not put back together properly.

Stop thinking everything is the fault of the ECU. 99% of cases it is not.
There is a simple mechanical error here.

I don't believe the N75/waste gate is plumbed correctly.

[Costash]

l I think you are wrong ,couse he just changed the turbo and ex manifold from what I know!I might be wrong in here but I assumed it is like what I been said.
Don t jump on my neck guys !It is just a thought.Anyway your advices is not gonna solve the problem.

PS:Good luck m8, hope to solve your problems!

[prj]

l I think you are wrong ,couse he just changed the turbo and ex manifold from what I know!I might be wrong in here but I assumed it is like what I been said.
Don t jump on my neck guys !It is just a thought.Anyway your advices is not gonna solve the problem.

PS:Good luck m8, hope to solve your problems!

Again, read the thread.
He only changed exhaust, the turbo was there before.

No one is jumping on your neck, but why not read a little bit before giving wrong advice?
Imagine if the OP goes and wastes his money on some parts when his are perfectly good from your advice?

[driftin jo]

YER, kin read the thread.

[Costash]

Do you want to remeber how is the missleading?You don t want that!I just said what was happend with mine but no boost spikes only missfires from 4k rpm.I don t said more than that, soo...just chill!

[prj]

But how is it relevant to this thread?
He has fuel cut from excess boost, not misfire from bad coils...
Look @ 3rd page of thread.

I think all of us had bad coils at some point.

[Costash]

'' it misfires at 4000rpm and splutters and cuts out '' it is his own words not mine soo....I just told what happend with mine, sort of this kind of story but no boost spikes.

[driftin jo]

The misfire is simply the ECU pulling the timing due to knock because of too much boost.

[prj]

And/or cutting fuel...

[Costash]

Get it now!

[R31LLY]

i have unplugged the n75 valve and the boost spike is exactly the same as when its plugged in, would this mean that the n75 valve is dead?

thanks all you guys your knowledge is much appreciated

[newsh]

Dead (jammed shut or leaking badly) or not plumbed up right.

Not sure how handy you are and how accessible the clips to the hoses are but what I would do is remove the N75 and plumb the hose that comes from the face of the turbo directly to the lower WG chamber. If you have a short bit of metal tube (like from the fuel lines under the car) you can use this to join the 2 hoses together. Block off the hose to the MAF hose.
The car should now only boost to 0.4 bar. (maybe a little more with the big exhaust and bigger turbo but not neccessarily..)
If it still boost spikes then you either have a stiffer WG spring or a hole in the WG diaphagm or the WG is jammed shut.

[driftin jo]

The normal thing to happen when the N75 is dead is that it opens the line from the turbo to the wastegate, the same as what happens when you unplug it.

This makes me think even more that it is not connected correctly.
You could have a bad wastegate diaphragm but what are the chances of this happening just after
people have been working on your car.

[R31LLY]

my wg spring is standard