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Old 05/01/2012, 06:56 PM   #1
91jdmintegra
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Default Da question

Is there a way to eliminate the vaccine lines that go to ur stock air intake or do u have to have them for a b18 thanks

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Old 05/01/2012, 07:25 PM   #2
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Default Re: Da question

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Originally Posted by 91jdmintegra View Post
Is there a way to eliminate the vaccine lines that go to ur stock air intake or do u have to have them for a b18 thanks
Yes you can eliminate your vacuum lines. It is very simple....go to your nearest parts store and have them find a heater hose small enough to fit the diameter of the lines you are removing. The reason why is both air and coolant lines are linked into one piece on our year make models. What you need to do is just run that new coolant line from behind head (youll see the line back there easily) right up to the iacv. This eliminates that pesky metal line that always gets in the way. You could always take a new hose from valve cover to intake if you wanted to.
Let me know if you need more info....it is VERY simple to do and should only take ya approximately 10 minutes tops to do.


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Old 05/01/2012, 07:31 PM   #3
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Default Re: Da question

Thanks man appreciate it

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Old 05/01/2012, 08:01 PM   #4
91jdmintegra
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Default Re: Da question

I have one more question so the vaccine lines that come off the intake manifold I just leave those ones with no hoses on them or what?

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Old 05/01/2012, 11:00 PM   #5
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Default Re: Da question

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Originally Posted by 91jdmintegra View Post
I have one more question so the vaccine lines that come off the intake manifold I just leave those ones with no hoses on them or what?
If you do the method described above you can remove that entire metal line out. On DA's they used a rubber line from intake manifold to hard line then back to the iacv under the throttle body. Basically all you are doing is taking the entire hard line off and replacing it with a heater hose line (since it has coolant flowing to it). Once that is done you'll have no need for that hard line at all. Honda took both the intake vacuum line and coolant line and fused it together. What happens when you buy an intake is most of the time you won't use the stock vacuum line. This means that when you try to remove it...BAM.....you end up with a coolant line as well...most people leave the metal lines in. For most of us that have been doin this for years it was clear to see that all you need to remove it at 2 adjustable clamps and a heater hose. That essentially lets you remove that line completely out of the area.

Now, after reading this over, are you talking about also removing the ones behind the intake manifold? I may have given you info for the line that runs coolant and vacuum. The ones behind the intake manifold I would leave alone if those are the ones you're inquiring about. I may need to post a pic for reference....lol....sorry if this has caused any confusion.


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Old 05/01/2012, 11:35 PM   #6
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Default Re: Da question

Ya I was trying to put a pic up but couldn't figure out how to it from my phone if u could tell me how to do that ill put one up thanks

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Old 05/02/2012, 09:55 AM   #7
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Default Re: Da question

And no I was talking about the ones in the front not back of intake

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Old 05/02/2012, 11:53 AM   #8
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Default Re: Da question

I'm interested in this as well. The DA bays are excessively messy so I'm gonna start researching how to clean them up. I think there are some lines that run the canister, and a bunch or what look like plastic recirculating valves.

A picture would definitely clear things up. If anything, post it to your facebook or cardomain. Then right click the picture on your facebook/cardomain, click copy image location and post that link here.

- Brandon

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Old 05/02/2012, 06:16 PM   #9
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Default Re: Da question

One of u guys wanna send me a text n I will send a pic to u 5154911611

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Old 05/02/2012, 07:06 PM   #10
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Default Re: Da question

Let me get this clear. Are you talking about the vacuum line that runs from the valve cover to the intake piping (before the trottle body). I wouldn't exactly recommend removing that one. You just take the hose off and you're good to go, might wanna put a filter on the valve cover and plug the hole on the intake when you do it. This is the one Rodney is referring too.

Then there is one that runs from the valve cover to the intake manifold itself? That one too can simply be removed and plugged as well. Although again I would'nt recommend removing it.

Those two hoses have to do with crank case ventalation, depending on which b18 you're refering too one may also run to an oil catch can on the back of the block as well. These help draw possitive pressure out of the crank casing area when the pistons go down and they do help with HP, not too terribly much and if you remove them you won't even notice a difference, but they are there for a good reason. Some people remove these to go for that "clean" look.

As for the remainder of hoses that you are refering too, you cannot remove the one for the fuel pressure regulator, you need that for your fuel pressure. There should also be some that run to a vacuum canister that's located next to your fuel filter. Those can be removed and plugged, then you can go ahead and remove the canister itself and plug the hose that runs to that.

Hopefully this is enough to answer your question.


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Old 05/02/2012, 07:09 PM   #11
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Default Re: Da question

Oh and I can't remember for sure or not, but I think it's on the DA that they also have the firewall mounted MAP sensor. This will have hoses running to it. If you're looking to remove those hoses you need them there for the MAP sensor. One thing you can do to clean this up is buy a newer throttle body that has the MAP sensor located on the trottle body itself. This way you can get rid of the cluster fuck that's on the firewall. Although I can't remember off the top of my head if the DA has the firewall mounted sensor on not so this may or may not pertain to you.


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Old 05/02/2012, 11:17 PM   #12
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Default Re: Da question

No that's not what I was talking bout but its all good I got it figured out thanks tho

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Old 05/03/2012, 07:33 AM   #13
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Default Re: Da question

This is what he was trying to do fellas.............NOT the second picture below. Pics are off my old black DD DA. Where you see my hand at is where the new hose goes....which goes up to the front of the head by the coolant neck (basically where the upper radiator hose is). On other vehicles the line will be behind the head where the intake manifold meets it. I basically took a hose from IACV up to the front with two clamps. Then a breather to the valve cover.....which is old school 1990's technology being used in 2000....lol


THIS IS NOT WHAT HE WANTS TO CLEAN UP!!


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Old 05/03/2012, 08:40 AM   #14
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Default Re: Da question

Yeah I was curious about the latter. That's all emissions related right?


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Old 05/03/2012, 03:32 PM   #15
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Default Re: Da question

Ya that's what I was talking about thanks importsusa

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