Turbo242

ok so i install my intercooler and ever since then my BOV has not been working. i loosened it all the way out, took it apart, cleaned it. im stumped, i cant think of anything else that i can do to make this thing work.
by the way its a Go Fast Bits bov. i bought a OEM bosch recurculating valve yesterday at the JY and it dosnt work ethier

SpankedYA!

Then its the vaccuum source. You do get boost right?

FooK

Turbo242

yea im running 10psi, it used to blow off with out the intercooler and no vacuum source.

ZC4ME

Ummm, you need a vaccuum source on the BOV, intercooled or not.

FooK

projekteg

i doubt it was blowing off before, you were maybe hearing more noticeable compressor surge. bov HAS to have vacuum to open when the throttle is released, unless you're just running soo much boost that it opens b/c of all the pressure, but not likely to happen with just 10psi

jung4g

owned.

someone jumped into things a bit. You know a bov is supposed to make noise, but you don't know how... well the vacuum from the intake manifold that is created when you close the throttle plate lifts up the piston in the bov, opening it for the excess pressure to be released, thus the woosh sound. If you "bov" made noise before the vacuum line was hooked up, you were hearing that excess boost go back through the turbo and trying to stop it from spinning = bad!!

If your car sounds like a car on the Fast and the Furious, you have issues. Hook up your bov to any vacuum source on the IM (ie. the fuel pressure regulator line, just use a t-fitting) and you'll have a working bov.