Hey guys.... so I got this s13 with an s14 sr20det in it and it idles funny most of the time itl idle where it is supposed to for a little bit then die down to like 6-500 or it will just die.... there are a couple vacuum lines that are bolted off like 3 or 4 of them under my manifold... is that normal? And I have already cleand my maf, iacv, can't find vacuum leak.... did a compression test and it was good.. when my car idles normal my vacs about 17 and when it dies down it about 11-12.... problyy just cuz its trying to idle... but still I think this problem might have to do with some blocked off vacuum lines? Dose someone have a link to a good s14 sr20det vacuum diagram? I would apritiate it a lot . Any sugesstions?

20turbos13 wrote: Dose someone have a link to a good s14 sr20det vacuum diagram? I would apritiate it a lot . Any sugesstions?

Download the S14 SR20DET FSM. Link is in the FAQ at the top of this sub-forum.

Are you sure I hve been looking in the faq section and cannot find s14 sr20det fsm.....

Okay well I found the s14 sr20det fsm but I cannot open it all I have is my phone to use the net with.... so if anyone knows a site or somthing that I could use my phone to look at a vacuum diagram that would be great..... and if anyone has any ideas of what my idle problem. Could be that would be greatly apritiated

The vacuum is very simple. One vacuum line from intake mani to bov, one vacuum line from intake manifold to fpr, the large tube next to the throttle body needs to go to the cold pipe. Make sure cold pipe elbow is large enough for iacv tube. For the turbo, assuming you are internal wastegate, there should be a vacuum line from the charge pipe to the boost controller, than from the boost controller to the wastegate. The nipple attatched to the throttle body is for your charcoal canister, rather hook it up, or cap it. Cap all the rest of the vacuum lines and then do a boost leak test.

How do I do a boost leak test?

And I don't have a bov... and when I bought one and was ready to put it on drift office told me the bov would create more problems..... so I have the large tube by the TB going under the manifold... the vac line from fpr to mani...and from the WG I have a vac line going to right underneath the TB.... with no boost contoller.... could this be my problem?

A bov creating more problems? I hope they know the sr was made stock with a bov to save the turbo. Maybe if vented to atmosphere, yes. Im not sure what your saying about the large tube. It goes from the pipe that goes to the throttle body to the big tube to the iacv tube. As far as the wastegate line, it should never see vacuum. To do a boost leak test you tube it. There are hundreds if different ways.

compactfean, it's common to remove a bov when you're trying to find vacuum/boost leaks, so most places will tell you to remove it when you have issues. A bad bov is one of the hardest things for someone new to diagnose unless it's your only issue.

Thanx now I feel like they where not lying to me.... a lot of people said its stupid not to put on my bov but they way they put t made a lot of sence

Does that large tube go to the cold pipe before the throttle body? That's for your IACV and it will create issues if not hooked up. If you can, snap a quick pic of the vacuum lines under the throttle body. Could also be the IACV itself is adjusted wrong or not working completely

I will post pictures in the morning of what I am working with

Ok so I can't figure out how to post pics from my phone but here is how my vac. Lines go.... so WG to a vac line right under my TB. Ivac gose right before the TB on my IC piping... FPR gose to the mani.and then there are 2 vac lines underneath the TB that are capped off.

May be a dumb question but what's a charge pipe? I cannot find a nipple off any of the turbo piping.... and I know s13 and s14 are a little different so if ur talking about s13 its probly not helping me out lol

It doesn't matter s13/s14. Its basic turbo knowledge. The charge pipe meaning hot pipe or pipe from turbo to intercooler. Most piping kits do not have any nipples coming off any of the pipes so you will have to weld one or drill tap and screw one in. other than that it sounds like your vacuum line are fine. A vacuum leak (boost leak) can also cause issues and there are some that you won't be able to find without a boost leak tester.

As far as pictures from your phone, download the snapbucket app and link it to your photo bucket account. When you take pictures, take them with snap bucket, then go into your photo bucket account and copy the image url code and paste it wherever you need to on here. Hope that makes sense.

well when trying to explain the vac lines I makes a difference whether its s13 or s14 because they are a little different. But yeahthats makes sence to me. Thanx guys I will do a vvac leak test

And another thing... how do I know for sure if my iacv is not working...? I know you can unplug it and if nothing changes its probly dead... but my idle is constantly searching... so I cannot tell