Vacumn line question - Honda-Tech


Vacumn line question

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Old 03-16-2017, 09:48 AM   #1
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Default Vacumn line question



Which one will go to the z6 manifold
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Old 03-16-2017, 12:35 PM   #2
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Default Re: Vacumn line question

If someone doesn't answer before I get to my car I'll snap a pic for you but I probably won't get a chance to respond until tomorrow.
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Old 03-16-2017, 12:38 PM   #3
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Default Re: Vacumn line question

No problem thanks.. it had the map sensor up there to but i extened it to the throttle body...
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Old 03-16-2017, 12:41 PM   #4
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Default Re: Vacumn line question

I did the same on mine.

EDIT: Actually now that you mention it, whatever hoses are hanging from the old firewall map sensor you don't even have to worry about. In fact you can remove it completely. Those hoses would've connected to a tube on the old throttle body.

EDIT 2: Found an old pic of mine with the old sensor still on firewall. You can see I just removed the old hose.





Now that I'm comparing the two, I see that yours is slightly different. I'm wondering if the extra hoses you have are EGR specific. If they are, you can eliminate them as well since your new manifold doesn't use it.

For the last pic, you can route that to any existing port on that side of the manifold.
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Old 03-16-2017, 12:46 PM   #5
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Default Re: Vacumn line question

Whenever you get the picture it will help alot then. Thanks
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Old 03-16-2017, 10:20 PM   #6
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Default Re: Vacumn line question

Ok so take out the firewall map sensor... and the rest i hook up to vacumn line on the new mani.??? And 2 questiins what is that piece called on the new mani with the sensor... and that hose from the coolant pipe i blocked it but no leaks anywhere... each intake has 6 ports for water to go through where did the extra one come from? I dont remember any being plugged.. i know i should have looked as i took it apart but i thought it was an easy swap
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Old 03-17-2017, 06:12 AM   #7
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Default Re: Vacumn line question

Get familiar with this site or a similar one, the diagrams will help out.

https://www.hondaautomotiveparts.com



As mentioned above, I believe some of those components are HF specific. This diagram (under "control box tubing") shows those components present when an HF model is selected. You can still hook up the Purge Solenoid that's already on the manifold to any free vacuum port (the last pic you posted in your initial post of this thread, there should be a port right next to it). I'd suspect you can remove that whole assembly off the firewall at this point, according to that pic, it is holding a purge solenoid which is mounted to the manifold on newer models, a map sensor which is mounted on the throttle body on newer models, and a control valve and a frequency valve which I can only imagine both being unique to the HF engine which you no longer have.

I can only think of one reason to leave it on there really, and that is to avoid having to extend the connector for the purge solenoid that is mounted on the intake manifold. Much easier to find a length of vacuum line to reach a port on the intake manifold than it is to extend that electrical connector going to manifold mounted purge solenoid. Your call.

Last edited by 24TEN; 03-17-2017 at 06:27 AM.
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