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    Thread: quick vac hard line question

    1. Member docterelliott's Avatar
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      10-08-2012 12:46 PM #1
      sai and n249 delete DIY's say to cut the vac lines right at where they enter the hard lines that run along the side of the motor and back. I dont plan on deleting the combi valve anytime soon so can I just leave the hard lines open and just run a dedicated vac line from the manifold to the DV? those hard lines dont lead to anything important do they?

    2. Member MrAkalin's Avatar
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      10-08-2012 02:25 PM #2
      They lead to the SAI. Pictures would help, but if we're thinking the same thing just cap them.
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    3. Member docterelliott's Avatar
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      10-08-2012 02:47 PM #3
      the hard lines that these are connected to. I know one goes to the DV which I routed straight to the manifold but the other large one and smaller one Im not sure about. just cap em?

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    4. Moderator groggory's Avatar
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      10-08-2012 02:53 PM #4
      Little tiny one goes to your combi valve.

      One of the big ones goes to your DV

      Another big one goes to your TIP

      I can't remember where the last one goes
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      10-08-2012 03:07 PM #5
      Doesn't one go to the vacuum reservoir on the valve cover?
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    6. Moderator groggory's Avatar
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      10-08-2012 03:19 PM #6
      Quote Originally Posted by Neezy13 View Post
      Doesn't one go to the vacuum reservoir on the valve cover?
      Yep. Good memory. That's the last of em.

      Little tiny one goes to your combi valve.

      One of the big ones goes to your DV

      One of the big ones goes to your TIP

      One of the big ones goes to your vacuum res on top of the valve cover
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    7. Member docterelliott's Avatar
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      10-09-2012 02:17 AM #7
      is there a purpose for that vac resavoir or can I just delete that? also if I just cap the small vac line leading to the combi valve will it keep the valve closed? thanks alot guys.
      Last edited by docterelliott; 10-09-2012 at 03:41 AM.

    8. Moderator groggory's Avatar
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      10-09-2012 04:19 AM #8
      If you have the n249, you need the vac res

      Don't do that to your combi. If you want to delete it, do it the right way
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      10-09-2012 07:12 AM #9
      There you go:



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      10-09-2012 10:50 AM #10
      Just get the 18 dollar plate from 034motorsports! mine took two days to be delivered and it's best to just do it the right way.
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    11. Member docterelliott's Avatar
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      10-09-2012 07:27 PM #11
      Ok so i can delete the vac resavoir since i have deleted the n249. Thanks for the input. I plan to properly delete the combi valve but for now i just dont have time to dig into the engine bay. Especially since u need to take the coolant flange off, have coolant spilt out everywhere, and then fight to get all the air bubbles out. personally i hate messing around with the coolant system. For now, the combi valve is staying until i have a day off work which wont b for weeks and i dont want the combi valve acting as a vac leak if thats what its doing.
      Last edited by docterelliott; 10-09-2012 at 07:30 PM.

    12. Moderator groggory's Avatar
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      10-09-2012 07:44 PM #12
      You got my advise.

      Do as you will
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      10-09-2012 07:58 PM #13
      What could happen if the combivalve is not working properly?
      Lets say that there is a vacuum leak in the hard line going to the combivalve

    14. Member docterelliott's Avatar
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      10-12-2012 03:43 PM #14
      does anyone know what the combi valve will do if it does not have vac source?

    15. Moderator groggory's Avatar
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      10-12-2012 03:59 PM #15
      Quote Originally Posted by docterelliott View Post
      does anyone know what the combi valve will do if it does not have vac source?
      It should stay closed
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      10-14-2012 09:56 PM #16
      you can still use the n112 valve to open your combi without running the n249.
      That way you can keep all your evap stuff if you have emissions in your state.
      I still use the hardline for the combi, dv to manifold, The hose that connects to the tip and the one that connected to the vac reservoir for my boost gage so the hose is not running all the way up to the FPR.

    17. Member docterelliott's Avatar
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      10-15-2012 01:36 PM #17
      yah thats kinda what I had planned on doing. I like using the hardlines if possible just because theyre metal so I know they wont pop a hole. I dont need emmisions where Im at so I dropped the cat already and Im not worried about the emissions crap therefore Ill probably plug the port to the combi valve since ive bypassed the n112. thanks

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