HKS SS BOV, do I need to vent it back into my intake??
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Joined: Nov 2002
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From: Virginia
HKS SS BOV, do I need to vent it back into my intake??
I installed the HKS BOV where the stock one was and it just blows off under the hood. The stock one vented back into the intake. I noticed it runs a little rougher at idle and almost every time I shift I get a small backfire.
Should I vent it back into the intake for the O2 sensor to read or could the HKS BOV be set wrong? I ajusted it several times with no improvement.
Should I vent it back into the intake for the O2 sensor to read or could the HKS BOV be set wrong? I ajusted it several times with no improvement.
The Power of 1.3
Joined: Aug 2001
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From: Shrewsbury, Massachusetts
Originally posted by vudoodoodoo
You don't need to plumb it back to the intake. II have the same BOV and have no problems. Did you plug up that hole where the stock BOV was plumbed to?
You don't need to plumb it back to the intake. II have the same BOV and have no problems. Did you plug up that hole where the stock BOV was plumbed to?
Lives on the Forum
Joined: Dec 2001
Posts: 14,716
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From: San Lorenzo, California
Mazda likely did it for two reasons:
1. Oil gets into the intercooler piping from the turbos and is blown out the BOV.
2. To make the BOV release quiet. Not everyone likes to hear that sound every time they let off the throttle....
1. Oil gets into the intercooler piping from the turbos and is blown out the BOV.
2. To make the BOV release quiet. Not everyone likes to hear that sound every time they let off the throttle....
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Joined: Nov 2002
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From: Virginia
The hole in the intake is blocked off now. I don't know, I'll put the stock one back and sell the HKS to my friend building a FC turbo. He said he wants it anyway. I'll lose $50.00 but hell you live and learn. I'm not to keen on the hiss sound myself. It almost hurts your ears when you have the windows down!! It just seemed to run better with the stock one. Plus I need the money for a boost controller.
WWFSMD
Joined: Jun 2001
Posts: 5,035
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From: SoCal
Your friend with the T2 will have to plumb it back in to the intake (after the air flow meter) or his car will run rich right after it blows off the metered air. However, this isn't entirely true since lots of people vent the BOV to atmosphere without too many complaints. In theory, the air should be plumbed back, but in practice many people don't have any problems with venting it to atmosphere.
It shouldn't have made any difference on your FD since the FD doesn't have an air flow meter. The stock BOVs are fine, though, so it wouldn't offer any performance advanatges for the FD anyway. It is just a noise maker.
-Max
It shouldn't have made any difference on your FD since the FD doesn't have an air flow meter. The stock BOVs are fine, though, so it wouldn't offer any performance advanatges for the FD anyway. It is just a noise maker.
-Max
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Joined: Dec 2001
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From: Somewhere in California
Originally posted by rynberg
Mazda likely did it for two reasons:
1. Oil gets into the intercooler piping from the turbos and is blown out the BOV.
2. To make the BOV release quiet. Not everyone likes to hear that sound every time they let off the throttle....
Mazda likely did it for two reasons:
1. Oil gets into the intercooler piping from the turbos and is blown out the BOV.
2. To make the BOV release quiet. Not everyone likes to hear that sound every time they let off the throttle....
