help, my dv sounds like a duck

**dmaize** · 10-07-2008 08:42 AM

so i put in some new vacume lines, and i could have put my dv back in wrong? its the tt version, but now it will not hold boost, and when it will hold at like 3psi, it just sounds like a duck.

my engine is stock.

any ideas?

does it matter what way the dv went it? the way i put it in, the vacuum nipple is facing up.

**blmlozz** · 10-07-2008 08:58 AM

the pressure side should be going in the way where it pushes down on the diaphram..the idea is that when pressure exceeds the capability of the valve to hold it back it vents back into the system. so the valve side needs to go on the charge-pipe side and the vent side needs to go to the intake pipe side. Hope that helps you tell which way it goes.

for pressure loss of that magnititude I'd check your vaccum lines again, and mabye the ebc as well.

**dmaize** · 10-07-2008 09:13 AM

what should i check for? i don't have a leak. oh and it holds fine in 4th and 5th
its like 1st 2ed and 3rd.

**AWDios** · 10-07-2008 12:09 PM

You didn't do this mod did you?

http://www.youtube.com/watch?v=VbNxugO-uf0

:D

**CaSp3r9** · 10-07-2008 01:06 PM

^^^ Hahaha

How many miles are on the DV? Could be a torn diaphram flapping around; like the opening of a balloon when you let the air out. Dunno, just a guess.

**dmaize** · 10-07-2008 05:25 PM

aaaaahahahaha duck call. thats is to much. no i did not do that. i wish i did.
it has Maybe 15k on it. its the 710n one.

**dmaize** · 10-07-2008 05:49 PM

so what would happen if i put it back in backwards?

**biketsai** · 10-07-2008 06:04 PM

Originally Posted by awdios

you Didn't Do This Mod Did You?

http://www.youtube.com/watch?v=vbnxugo-uf0

:d

Hahahahaha

**A4Rob** · 10-07-2008 06:20 PM

Originally Posted by AWDios

You didn't do this mod did you?

http://www.youtube.com/watch?v=VbNxugO-uf0

:D

Thats my buddy Max's vid. haha

**djwimbo** · 10-07-2008 08:37 PM

Originally Posted by dmaize

so what would happen if i put it back in backwards?

I installed my 710N valve in backwards just to prove it works both ways. Yes, it works both ways, at least for me it did.

NOT MY IMAGE, but here's the valve installed.

**Poopie** · 10-07-2008 08:41 PM

sounds to me like your vac line popped off or is disconnected.

**dmaize** · 10-08-2008 09:21 AM

but i still have full boost in 4th and 5th. if my vac line popped off, wouldn't i loose boost in all gears?

**djwimbo** · 10-08-2008 08:40 PM

Originally Posted by dmaize

if my vac line popped off, wouldn't i loose boost in all gears?

that depends on a couple things. if the DV is installed backwards the boost would hold it shut. Installed correctly it would only boost until the positive pressure overcomes the spring inside the DV.

at least if I'm thinking straight