1. Welcome to 4Runners.com!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all 4Runner discussion topics
    • Transfer over your build thread from a different forum to this one
    • Communicate privately with other 4Runner owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Where do these hoses attach?

Discussion in '1st Gen 4Runners (1984-1989)' started by Poppie51, Jul 22, 2015.

  1. Jul 22, 2015 at 6:20 PM
    #1
    Poppie51

    Poppie51 [OP] New Member

    Joined:
    Jul 22, 2015
    Member:
    #784
    Messages:
    1
    Gender:
    Male
    Vehicle:
    1988 Toyota 4Runner
    I have a 1988 Toyota 4runner with a 4 cylinder engine. The engine has just been rebuilt and i'm installing it but having a few problems with the fuel and vacuum lines. The main problem is the hose coming from the fuel pressure regulator. There is one towards the bottom of the regulator that I can not figure out where it connects. Also there is a hose coming from the top of the regulator which I also can not figure out where it connects. Does anyone have any idea where these two hoses attach? Any advice,especially photos, will be greatly appreciated.Thanks
     
  2. Jul 23, 2015 at 5:17 AM
    #2
    UssMoGn

    UssMoGn That Vegas Dude

    Joined:
    Apr 9, 2015
    Member:
    #558
    Messages:
    426
    Gender:
    Male
    First Name:
    James
    Vehicle:
    1996 TaCoRunner
    Extented Coil Lift. Custom bumpers
    Pictures of your issues would help a lot! Also so would a Hanes Manual from Autozone/Pepboys! Im not that familiar with the 88 motor. But off first guess your Maybe a Return line to the tank?.... To me Fuel usually goes...... (Tank)>(Pump)>(Regulator?)>(somewhere a Filter)>(Carb/Fuel Injection)>(ReturnLine)>(Tank)
     
  3. Jul 4, 2021 at 6:24 PM
    #3
    22 yoga chuck

    22 yoga chuck New Member

    Joined:
    Jul 4, 2021
    Member:
    #22219
    Messages:
    9
    Gender:
    Male
    One is manifold vacuum, other is ventauri. It's manually vontrolly the regulator with vacuum to prevent over pressuring fuel rail. Early fuel injection stilil had several mechanical controls to operate EFI. AS Time went on sensors were created for all these efi op require ments.

    If you disconnect regulator, blow airvthroughvit then suck on one side or other tonidvreturn control line- manifold side
     
  4. Jul 5, 2021 at 11:47 AM
    #4
    PhantomTweak

    PhantomTweak New Member

    Joined:
    Dec 20, 2019
    Member:
    #12402
    Messages:
    444
    Gender:
    Male
    First Name:
    Patrick
    OREGON
    Vehicle:
    1987 4Runner all stock, owned 32 years
    None. Bone Stock. EXCEPT: Brushguard, tow hitch, both welded to the frame. It's good to have friends and a fully equipped garage!
    ScreenHunter_2979 Jul. 05 11.20.jpg
    Not exactly a picture, per se, BUT...
    This is looking from the firewall to the front of the engine. The pressure regulator is the small device near the hand, which is on the fuel return line. Where the fuel returns to the tank, if not used. On the top of the pressure regulator you can see the vacuum line that controls the pressure the regulator provides. Look on the little sticker on the underside of the hood to see where the vacuum line goes. I am pretty sure it goes to a VSV, mounted on top of the valve cover. I can't recall just which of the VSVs it is.
    Here is the vacuum diagram:

    vacuum hose toyota.jpg

    You can see the vacuum line goes to the leftmost VSV on the top of the diagram.

    Does all that help?
    Pat☺
     

Products Discussed in

To Top