 bov or turbo issues? |
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 Mar 18, 2015 - 8:42 AM
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 Enthusiast  Joined May 4, '09 From coral springs florida US Currently Offline Reputation: 21 (100%)  |
i have a greddy type s on my 3rd gen 3sgte. when i first did the engine swap and add this bov the bov was pretty loud. it always used to make a high peak pshhhhhh!!!! no matter what was the rev. now i has to go iver 3500 or 4000 to hear the pshhh and is not even loud its a lot more quiet.
is not that im worry about just the noisr but something could be getting bad with my turbo? the gauge showd that is boosting fine though. any ideas? --------------------  |
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Mar 18, 2015 - 1:06 PM
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Enthusiast Joined Dec 8, '03 From Lancaster CA Currently Offline Reputation: 6 (100%) |
free rev the engine and watch the BOV, if its opening and a rush of air comes out, then its working
-------------------- 2001 Celica GT-S Turbo
1997 Supra TT 6speed 1997 Celica 3MZ/1MZ swap 1990 Celica All-Trac |
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Mar 18, 2015 - 2:52 PM
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 Enthusiast Joined Feb 23, '12 From Warrior, AL Currently Offline Reputation: 0 (0%) |
Could be the valve is just barely opening for some reason. Generally there'll be a vacuum line coming off a solenoid leading to the BOV, could be the solenoid or line is cracked.
-------------------- 2001 Miata LS 5-speed
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Mar 18, 2015 - 10:38 PM
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Enthusiast Joined Dec 8, '03 From Lancaster CA Currently Offline Reputation: 6 (100%) |
under idle, its normal for a BOV to be open just a little. its supposed to close under slight throttle and of course under boost it should be closed.
-------------------- 2001 Celica GT-S Turbo
1997 Supra TT 6speed 1997 Celica 3MZ/1MZ swap 1990 Celica All-Trac |
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Mar 18, 2015 - 11:51 PM
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Enthusiast Joined Feb 23, '12 From Warrior, AL Currently Offline Reputation: 0 (0%) |
Weird it'd all of a sudden get quite though. Thought of something else, if they're like HKS they have the "whistle" or whatever you want to call it you can change out. Could be that fell out.
-------------------- 2001 Miata LS 5-speed
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Mar 21, 2015 - 11:47 AM
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 Enthusiast Joined Aug 31, '02 From Philadelphia, PA Currently Offline Reputation: 8 (100%) |
You probably have a boost leak. You can do a boost leak test to find out.
-------------------- 15PSI - 30MPG - Megasquirt Tuned
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