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Old 06-06-2005, 05:39 AM   #1
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how important is the bvsv ?

Mine has both of the connections for the valve for vacuum broken off, and I just called the dealer for a price quote and the wanted $48! I almost choked on my coffee when he told me, thats rediculous for a little valve like that. The line that it connects to runs from the purge side of the black canister to the BVSV and then to the thottle body. If i bypassed the valve and ran straight vacuum from the throttle body what would be affected?
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Old 06-06-2005, 07:33 AM   #2
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is that the valve on a coolant passage? if its the same on i'm thinking of on the supra engine i installed, i bypassed it completely and it affected nothing but then again i removed the charcoal canister entirely due to a fuell cell install instead of the factory gas tank.

if you bypass the valve the tank will be "functioning" all the time instead of just when the motor is hot
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Old 06-06-2005, 08:57 AM   #3
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Sounds like you may have either some different connections or something hooked up incorrectly. The black cannister is the charcoal filter for the evap system. On my '85 it is directly connected to the "P" port on the TB (P -> Purge). The BVSV is part of the EGR system, passes TB vacuum to the EGR modulator, but only once the engine/coolant warms up sufficiently (i.e. it blocks EGR operation when the engine is cold).
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Old 06-06-2005, 09:05 AM   #4
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listen to him, he knows more than i do
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Old 06-06-2005, 09:35 AM   #5
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I think that might control the EGR on the 22r but on the 3vze its goes from the canister to the valve then to the throttle body, heres a link to what I am talking bout. http://personal.utulsa.edu/~nathan-b...74layoutan.pdf


in that picture they call it a tvv but in my chilton manual for a 88 3.0 v6 they call it bvsv. same ลลลล, different smell
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Last edited by justanother4x4; 06-06-2005 at 09:38 AM.
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Old 06-06-2005, 01:53 PM   #6
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$51 for that part from Boulder Toyota. Mine has broken plastic parts as well. I just duct tapped everything together until I get around to bypassing the valve. I don't think the bypass will hurt anything since that's how it's done on the 22re. The BVSV is designed to let gas fumes into the TB only after the engine reaches a certain temperature.
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Old 06-06-2005, 01:53 PM
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