Delayed BOV "Whoosh" on Neutral WOT

Tommeh · 07-22-2013, 12:33 PM

Last night I the car had a rough start/idle. I proceeded to raising/lowering the RPMs in neutral. Before I got over it I did a WOT and let off at around 6k (Still in neutral) and it sounded like the RPMs dropped from 6k down to 4k then I got the "Whoosh" sound.

Under load when driving the car the BOV acts normal. Why is it when the car is in neutral the BOV is delayed?

Wescuddles · 07-22-2013, 12:47 PM

Quote:

Originally Posted by Tommeh

Last night I the car had a rough start/idle. I proceeded to raising/lowering the RPMs in neutral. Before I got over it I did a WOT and let off at around 6k (Still in neutral) and it sounded like the RPMs dropped from 6k down to 4k then I got the "Whoosh" sound.

Under load when driving the car the BOV acts normal. Why is it when the car is in neutral the BOV is delayed?

Less load?

b1aze · 07-22-2013, 05:14 PM

Check for vacuum leaks if your idle is rough.

MIAblu1 · 07-22-2013, 06:38 PM

Quote:

Originally Posted by b1aze

Check for vacuum leaks if your idle is rough.

Been wondering how people have been checking for leaks.... I know when I had Audi's we had a little setup to run pressure through the lines without turning the car on making it possible to listen for leaks but I'm wondering how people are doing so with these cars and if its any different for N54 TT and N55 ST

07-22-2013, 12:33 PM	#1
Tommeh Lieutenant 56 Rep 481 Posts Drives: 96 BMW M3 & 16 GMC Canyon Join Date: Mar 2011 Location: Washington iTrader: (0)	Delayed BOV "Whoosh" on Neutral WOT Last night I the car had a rough start/idle. I proceeded to raising/lowering the RPMs in neutral. Before I got over it I did a WOT and let off at around 6k (Still in neutral) and it sounded like the RPMs dropped from 6k down to 4k then I got the "Whoosh" sound. Under load when driving the car the BOV acts normal. Why is it when the car is in neutral the BOV is delayed? __________________ 2008 BMW 135i ///MSport Alpine White / Taupe Leatherette Cobb 2+ Aggressive \| BMS Intake \| ER Charge Pipe + Tial Q \| ER FMIC \| RR Downpipe \| RR Exhaust \| RR OCC \| KWV1 \| Apex ARC-8 245/18/40, 275/18/35
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07-22-2013, 05:14 PM	#3
b1aze Just one more taste... 566 Rep 2,011 Posts Drives: 2013 128i 6MT MSport Join Date: Aug 2012 Location: Uxbridge MA iTrader: (18)	Check for vacuum leaks if your idle is rough. __________________ My Build Thread: Jet Black 6MT 128i with MSport
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