Vacuum line Diagram. (2 Viewers)

[petegangies]

@Bsteimel did you try the FSM? You should have a label on the underside of the hood with the vacuum line routing on it. If not, you can get one from Toyota. Use your VIN and look up the label in the "Body/Interior" section of the electronic parts catalog (EPC) on the PartSouq/Toyota website (I'd recommend bookmarking that page). You can get the part number from there and order the label from anywhere. I don't have a LX450 VIN handy, but this is what it looks like for my '95:

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FWIW, all these labels were available as of last year (I bought some of them), but are now showing discontinued. Maybe they'll return to production later, or some enterprising someone here will print some on adhesive paper and create his own side business.

You can use a 1995-1997 Land Cruiser FSM for most repairs on the LX450, if you don't have a Lexus FSM handy, but realize there are some significant differences. The EWDs will not be the same; the Lexus has more stuff in the harness, and Toyota moved some things around in the dash. The basic systems needed to drive are the same though: engine, transmission, transfer, axle, and most of the interior. The A/C systems are different, in that Lexus used different controls.

This info is from the 1996 FSM (engine control section), but I think the '96 & '97 are the same. If not, you can find the info in the 1997 FSM. The FSMs are in the Resources section, for free download, along with some other publications which may be of use/interest to you.
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From the EWD:
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V3 is the VSV for EGR; V4 is the VSV for fuel pressure control:
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I'm having trouble getting a hold of part no. 90910-05212. I believe it's one of the hoses off the VSV or a check valve.

marked out from one of the pics from this thread:

 

[Malleus]

Let me look; I have it on my bench. I think its 8-mm vacuum hose. If you want the Toyota version, Dave Stedman at Japan4x4 can get it for you; I just bought one from him a couple of months ago, along with all the other hoses.

 

[petegangies]

Let me look; I have it on my bench. I think its 8-mm vacuum hose. If you want the Toyota version, Dave Stedman at Japan4x4 can get it for you; I just bought one from him a couple of months ago, along with all the other hoses.

picture I found online:

 

[petegangies]

I can get these easily off amazon AU, both Mackay brand and 8mm ID—$12-15 each. Either that, or I just put some EFI clamps on it. Mine looks okay as in not split, but I don't think it's a snug fit as you can rotate the check valve/vsv quite easily on it.