Go Back  YotaTech Forums > Toyota SUV & Truck Tech > 86-95 Trucks & 4Runners
Reload this Page >

Mysterious extra hose coming out of the air intake hose, 3vze?

Notices
86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

Mysterious extra hose coming out of the air intake hose, 3vze?

Old 04-01-2019, 12:19 AM
  #1  
Registered User
Thread Starter
 
Dilomski's Avatar
 
Join Date: Oct 2018
Posts: 35
Received 0 Likes on 0 Posts
Question Mysterious extra hose coming out of the air intake hose, 3vze?

Hello guys,

I bought a brand new air intake hose for my 1991 4runner 3vze 5 speed. Well, I noticed I got a very strange extra hose coming out of the air intake hose and going all the way to the other side under the intake manifold. What is this sort of upgrade? Where it possibly connects and what purpose can it serve at all? Should I just shut it and run without it? Very strange thing...

Here are the pics:


Mystery hose highlighted in red.

Connection to the air intake hose.

Going under the manifold on the passenger side.
Dilomski is offline  
Old 04-01-2019, 07:15 AM
  #2  
Registered User
 
Join Date: Sep 2007
Location: San Francisco East Bay
Posts: 6,685
Likes: 0
Received 126 Likes on 111 Posts
Holy, moly! That's a lot of after-market plumbing! Does this truck run on LPG (Liquified Petroleum Gas) or something?

In the usual configuration, the port on the side of the intake hose connects to the top of the left valve cover, to remove crankcase gas. On the right side, there is a PCV valve in the valve cover, which has a vacuum line to a port in the plenum (upper intake manifold) right above it. Your long hose that goes from the port on the intake hose LOOKS like it goes to where the PCV valve would be found. Which suggests that the PCV vacuum port (not shown in your photos) is used by something else, and whoever stitched all of this together was looking for another place to run the PCV valve.
scope103 is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
clok
Items Wanted
0
01-25-2019 08:05 PM
jcroper
86-95 Trucks & 4Runners
2
09-26-2012 06:21 PM
binky_rutledge
Newbie Tech Section
1
11-25-2011 05:09 PM
pepsibluefloat
86-95 Trucks & 4Runners
5
01-26-2008 03:37 PM
BOSTON4RUNNER
95.5-2004 Tacomas & 96-2002 4Runners
14
11-17-2004 07:00 AM


Thread Tools
Search this Thread
Quick Reply: Mysterious extra hose coming out of the air intake hose, 3vze?


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: