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LaCross LaCross is offline
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Car: 2010 135i
Default BOV or throttle problem? - 08-22-2015, 04:27 PM

2010 135i 81k miles, fbo, jb4 w/nls and BE flash
Titek chargepipe w/ HKS bov

Having an issue where when i left off the throttle at high rpm my BOV is VERY delayed, almost a whole second or so. Only happens at WOT and high rpm.


Any ideas?
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PR3CI5N335i's Avatar
PR3CI5N335i PR3CI5N335i is offline
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Default 08-22-2015, 06:31 PM

Any issues hitting target? If not then theres probably an internal issue with the bov. You would get throttle body codes and limp mode if the TB was bad.
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Boost'n e92 Boost'n e92 is offline
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Default 08-22-2015, 06:56 PM

Try contacting hks and see if they have a rebuild kit, the spring might be toast


2007 335i e92 space grey, a/t, fbo, mfactory lsd and boost addictions diff lock down, bmw pe mod, xHP stage 3, mmp stage 3, inlets and outlets and eos pi, custom tuned by pure evil estimated 620whp on e50 23psi. Current 1/4 mi 11.9 @116 on stock turbos.
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Drop a gear and disappear.
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LaCross LaCross is offline
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Default 08-22-2015, 07:34 PM

Is it possible that there is a delay between when I get off the throttle and when the throttle plate closes? I think I read something about that once
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feauto335xi feauto335xi is offline
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Default 08-24-2015, 09:03 PM

Where you located?
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Ddang06 Ddang06 is offline
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Default 08-24-2015, 10:05 PM

I noticed when I'm higher up on the rpm , I don't hear the hks bov vent at all between shifts .. With my old tial, I would hear to vent everytime between shifts.
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Nniftyfour Nniftyfour is offline
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Default 08-25-2015, 08:37 AM

Quote:
Originally Posted by LaCross
Is it possible that there is a delay between when I get off the throttle and when the throttle plate closes? I think I read something about that once
No. Not a second or half a second
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LaCross LaCross is offline
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Default 08-25-2015, 09:03 AM

I'm in central Jersey 08830. And the reason I ask is because the "sound" per say is very similar to when I wot shift. It's almost as if the car thinks I'm going to wot shift, realizes I didn't, and then the bov goes off.

Anything except wot@high rpm, the valve goes off normally
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Default 08-25-2015, 09:23 AM

Are you manual transmission? I have noticed that if I shift in a lower gear for the first time, and then let off the throttle , the BOV sounds is pronounced. The next shift continuing through will anticipate me doing the same thing and keep the throttle plate open and less if no sound is heard when shifting.
My theory is that the pressing of the clutch pedal signals to keep it open to reduce back pressure on the turbo to reduce flutter.
Try this, go WOT an then let off without pressing in the clutch and I bet you get your loud sound you are looking for.


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