sound clip of blowoff valve

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Feb 3, 2006 | 11:14 AM

#16

Eclipsed Evo

Evolving Member

Joined: Aug 2004

Posts: 195

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From: Woodbridge VA

If your just looking to get the noise remove your stock airbox and put a cone filter on. The stock BOV makes just as much noise as an aftermarket one.

Feb 3, 2006 | 11:15 AM

#17

vtlaxplaya16

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iTrader: (-3)

Joined: Mar 2005

Posts: 77

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From: CT

my 1g crushed dsm on my evo sounds amazing

Feb 3, 2006 | 11:16 AM

#18

Nez136

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Joined: May 2004

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From: Milwaukee

Quote:

Originally Posted by Wave

I have the HKS SSQ. While I like the sound, the drivability issues just aren't worth it. I'll actually be pulling mine off this weekend because it caused a p0234 overboost Check engine light last night. I'll be switching to something that recirc's (probably an JDM MR).

BOV's don't cause that trouble code.....your problem is something else

Feb 3, 2006 | 01:08 PM

#19

Wave

Newbie

Joined: Apr 2005

Posts: 76

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From: Seattle

Quote:

Originally Posted by Nez136

BOV's don't cause that trouble code.....your problem is something else

I'm 99% sure it did in this case. Here's why:
1. I have stock boost control. No MBC or anything. So if it wasn't the BOV, then it's the stock boost controller which I doubt.

2. Check out the last post in

https://www.evolutionm.net/forums/sh...ight=p0234+ecu

Quote:

...its the MAF sensor and the curve.. the ECU expects a particular MAF Hz (Airflow) reading at particular RPM's and load, if the MAF value is higher than its max reading for a particular RPM, it throws an overboost code.

What happened was I was getting on the freeway at high but not full throttle with some modulation. This caused the BOV to open as I backed off, but the turbo was still fully spooled. The sudden release of pressure caused the turbo to draw in a lot of extra air and the MAF readings were way off for the current engine load. This caused the p0234 overboost CEL.

Pulling the VTA BOV won't do any harm and if the error comes back, I know it's a problem somewhere else.