the dump valve is opening when i suck on the vacum line.....and when it opens the engine stops .... so the dump valve is working perfect !!!!

Now what ??? ((

Is it possible the spring in your valve is too strong and therefore staying shut all the time?

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GT4DC Events Co-ordinator
1996 ST205 UK

hi, you know i've got the same bov like yours.
your fitting is ok, because you said it's exactly like mine.
but...
what do you mean with 'it doesn't work' i've read this topic and see you said it does work when you drive the car.
in my car it makes no noise in neutral position when you don't rev hard as possible. when you only rev slowly to 3k rpm and then let, it doesn't make any noise (in neutral).
but when you rev hard to 5500-6000 then it makes a 'zshhh' sound (but not hard like at drive)
it is pretty louder while driving, but still quiter than a HKS ssqv.

mine it dosent make anything i took the car for a drive and 2ng gear making 6000Rpm no noise.....then 3rd gear 5000Rpm no noise.....ive put a smaller BOV stil nothing....

When i make the test with the car it was on the road !!!!

you can try another vacuum line to test if it does work.
for example one of the 2niples in the LHD from intake manifold.
or the line back of the manifold, which is plugged with a plastic.
to see if it works?

i tried that i conect the vacum to other vacum lines.....

i forgot to tell you something my celica has a problem for a month a go....
it dosent make full boost presure in 1st and 2nd gear and some times not iven in 3rd gear...the boost indicator from the dasbord it dosent reach the + sign....only some times

So i think that i have a problem with the presure and there for no presure no strenght to open the BOV valve....

I think

Sounds like you have a large boost leak or your turbo is broken.

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GT4DC Events Co-ordinator
1996 ST205 UK

+1, i think exactly the same.

Today we found that the turbine is broken....is not makeing pressure
((((((((((((

Sorry to hear that - hopefully you can find a replacement unit.

_________________
GT4DC Events Co-ordinator
1996 ST205 UK

What turbo do you recomand ??? and where can i get it ???

Standard CT26 if you're not planning on going much bigger. CT20b (ST205's turbo) if you fancy a few extra mods (requires a bit of work to fit).