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insane bov flutter

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Old Oct 12, 2008, 08:09 PM
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Question insane bov flutter
ok well my car just started to flutter like crazy in all RPM ranges boost is the same i tried a different BOv and the same issue...... im running the gfb @ 24LBS with no issues just started doing it randomly, i checked all my vac's and IC pipes it all looked good... i have no clue what else to do.any imput will be appreciated.thanx.
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Old Oct 12, 2008, 08:10 PM
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installed backwards?
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Old Oct 12, 2008, 08:11 PM
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backwards??? i dont think so it was perfectly fine for the last 3 months just started doing it...
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Old Oct 12, 2008, 08:12 PM
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I once installed my stock BOV backwards. The vent port intended for the intake was connected to the upper ic pipe. Check out other evo engine bays for a visual reference point. Good luck.

EDIT: With the car on, unhook the vaccum line for the bov, listen for vaccum. No vaccum means something is blocking the hose on the intake manifold side.
Last edited by Clayapples; Oct 12, 2008 at 08:15 PM.
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Old Oct 12, 2008, 08:13 PM
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yea if backwards...it stays closed...so you will always get compressor surge..which is what i assume you are talking about
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Old Oct 12, 2008, 08:16 PM
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no its installed fine lol i thought he was talking about the vac or something lol but i have no idea why its fluttering so dam hard... i adjusted the spring turned down boost and checked the vacs...
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Old Oct 12, 2008, 08:16 PM
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Backwards.
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Old Oct 12, 2008, 08:18 PM
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its not backwards i have ran it like this perfectly fine, then all of a sudden flutter???
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Old Oct 12, 2008, 08:20 PM
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Which BOV? Nothing beats the drivability of a stock Evo IX bov; and they have been proven to hold 30 lbs/boost.
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Old Oct 12, 2008, 08:20 PM
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Can you take a picture of your bov in the engine? Might help.
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Old Oct 12, 2008, 08:22 PM
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maybe the spring broke?
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Old Oct 12, 2008, 08:25 PM
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you wouldnt have happened to put a new boost controller in would you?
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Old Oct 12, 2008, 08:31 PM
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no it all worked fine its the GFB stelth FX and has ran fine, i also tried changing bov's and had the same issue i did install a new MBC about 2 weeks back but has ran fine until today
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Old Oct 12, 2008, 08:34 PM
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30psi
you sure about that?


Originally Posted by S2kracka
Which BOV? Nothing beats the drivability of a stock Evo IX bov; and they have been proven to hold 30 lbs/boost.
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Old Oct 12, 2008, 08:35 PM
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My friends GFB bov flutters like crazy too. I'll check his out to see if anything looks a miss with it this weekend. Its ideal to have a dedicated source line for the bov. Manifold to bov and nothing else.
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