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Couple Questions (trans gasket, and O2 sensor)

Discussion in '1st Gen 4Runners (1984-1989)' started by lowandslow24, May 17, 2017.

  1. May 17, 2017 at 10:23 AM
    #1
    lowandslow24

    lowandslow24 [OP] New Member

    Joined:
    May 11, 2017
    Member:
    #4028
    Messages:
    6
    Gender:
    Male
    First Name:
    Clay
    Vehicle:
    1988 4runner
    I have a 1988 4Runner I just bought and I am going through it repairing and getting maintenance up to date. I have a couple questions-

    There is basically no exhaust from the down-pipe back (no cat, midpipe, muffler, O2 sensor, etc.) I have ordered all the parts to reconstruct the exhaust but the O2 sensor. I see one hanging near the middle of the vehicle that I would assume would be the upstream O2 (right before the cat) but I cannot find the downstream (after the cat)... is there one on the 1988 4runners? I don't see any mounting point in the new exhaust for a downstream O2 as well as no cable/connector for the truck for it to go to.

    Also as you can see in the below photo, I have an oil leak coming from the trans. The picture is looking up on top of the trans where the shifters are mounted. Does anyone know the gaskets that need to be replaced in order to seal this up? I was going to replace the shifter collar (sloppy shifting) as well while I am in there.
    20hm2rb_6fe74f23123ff2db2c2cd7d128b33e9bfe47a5c7.jpg

    The truck stumbles/hesitates/sputtering in every gear at certain fuel load/ throttle position when its warm too... it's like there is no power then all of a sudden vtec kicks in. Its really weird - but I will address that once I get the O2 sensor figured out and the new exhaust on. I haven't adjusted the TPS or changed anything spark/fuel related yet.

    Thanks
     
  2. May 17, 2017 at 12:06 PM
    #2
    brochacho

    brochacho New Member

    Joined:
    Jun 20, 2016
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    467
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    PNW
    Vehicle:
    2018 Sequoia TRD Sport
  3. May 17, 2017 at 7:28 PM
    #3
    lowandslow24

    lowandslow24 [OP] New Member

    Joined:
    May 11, 2017
    Member:
    #4028
    Messages:
    6
    Gender:
    Male
    First Name:
    Clay
    Vehicle:
    1988 4runner
    Come to find out non-California 1988's only had one upstream.

    Still need to find those gaskets though!
     
  4. May 18, 2017 at 4:29 AM
    #4
    Toyotayoda

    Toyotayoda New Member

    Joined:
    May 8, 2017
    Member:
    #4015
    Messages:
    82
    Gender:
    Male
    Atlanta area
    Vehicle:
    1997 SR5 4x4, 302k and counting
    Tacoma whip, 99 console box, tru trac., steering wheel, PWMS and HVAC control out of a 99.
    You are right many 1996 and older vehicles only had the upstream oxygen sensor, no catalyst monitoring. I would check camelback toyota for that gasket, it may still be available, there are also a couple of bushings in there if I'm not mistaken, and they make a huge difference in how the shifter feels.
     

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