4dek

i can hear my turbo surge and my bov not blowin off, i have the greddy type s bov and it is set to the softest but still wont open or is that the bov i hear?pls help

da_dude

Test it out by pressing on the throttle on the throttle body and looking at the bov. Sound like your vacuum source is bad.

4dek

nope bov is not opening. vacuum sucks hard when i disconnected it and put my finger on the hose

chimmike

what bov are you using? Does it have an adjustment screw? If so, is it too tight? (i.e. screwed in too much?)

try loosening the screw (unscrewing it some) and test it. Don't do it a lot, but try little by little.

Haza45

I concur sounds like vacuum is weak. How large is the line and where is it plumbed too which port on the IM

da_dude

Open it up and check the diaphragm for wear and tear.

hotrod99

I had the same problem,and it ended up being a hole in the vacuum line...so you might wanna check the hose,could've melted somewhere

4dek

its the greddy type s bought it new. no leaks in the vacuum just checked it.adjusted it to soft but still not working. havent installed a boost gauge yet and i think its boosting just a little maybe thats why it doesnt have enough pressure to push the valve in the bov?

before intalling the bov i tried pressing the valve to open using my fingers (curiosity) and its pretty stiff. can be the bov defective or this is just normal? does the boosted air from the turbo help the vacuum on the bov open the valves or is it just the vacuum that opens it?

the vaccum line came with bov and it has its own vacuum source


Modified by 4dek at 10:05 PM 5/30/2008

da_dude

Where did you buy a greddy type s brand new? Last time I remember the greddy type s was discontinue for a while now. Are you sure you it's not the greddy type rs bov instead?

4dek

i bought it from a friend

da_dude

Well, you can alway open it up and take one of the two springs out. I had to do this to my greddy rs bov too as it was too stiff and I would get compressor surge with part throttle.

4dek

and also i cant hear that sound (either bov or surge) while reving the car at a standstill..Why?

da_dude

What turbo are you running? How high of the rev did you rev it to?

4dek

turbonetics t04e .63 .50. revved it around 5500

da_dude

Like I said before open the bov and take one of the spring out and get back to us. Maybe post some pics up too.

4dek

il try that tomorrow (stupid neighbors). il post tomorrow

chimmike

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 4dek &raquo;</TD></TR><TR><TD CLASS="quote">and also i cant hear that sound (either bov or surge) while reving the car at a standstill..Why?</TD></TR></TABLE>

you'll never create boost while revving standing still because there's no load on the motor, therefore your BOV will never go off. Especially running that t3/t4.

You really need to get a boost gauge! this will tell you whether or not you're in fact making boost!

And yes, check the vac line. No greddy type S I've ever seen has been too stiff to blow off even 7psi from a t3/t4.

4dek

then why do some cars revin while at the stop light and can hear the bov blowin off?

SovXietday

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 4dek &raquo;</TD></TR><TR><TD CLASS="quote">then why do some cars revin while at the stop light and can hear the bov blowin off?</TD></TR></TABLE>

Because it's a GTI running a turbo the size of a pencil eraser.

da_dude

My sc34 make enough boost to blow off at idle. Nothing like how a eclipse does it but can still do the job to check if the bov is working.

chimmike

then something isnt' right, you shouldn't be able to do that, or your BOV is adjusted too tight.