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Pulling out my hair

Discussion in '3rd Gen 4Runners (1996-2002)' started by Mtnboy1979, Aug 8, 2018 at 7:50 PM.

  1. Aug 8, 2018 at 7:50 PM
    #1
    Mtnboy1979

    Mtnboy1979 [OP] New Member

    Joined:
    Wednesday
    Member:
    #6665
    Messages:
    1
    Gender:
    Male
    Vehicle:
    1996 4Runner
    Hey guys! I’ve got a 1996 Runner 3.4L that I’m losing my mind over. This is my daily driver and hunting/fishing rig. She’s got 340,000 miles and runs like a top. Problem is it’s time for smog. The check engine light came on and it read the old standard P0135. So I changed both O2 sensors out of habit (this certainly isn’t my first Toyota) I ordered the sensors off of Amazon. I believe they’re Kwiksen sensors. I’ve used them before and never had a problem. This time, however, the check engine light came back on. It read P0135 again. I talked to my smog guy and he thought maybe I got a bad sensor. So I bought the $100 Denso part from Napa. Changed the upstream sensor and thought I had it whooped. THE NEXT DAY!!!! P0135 AGAIN!!! So now I’m chasing wire looms and poking lead tips off of my multi meter into everything I can think of. I’ve read some other forums that said there’s a fuse?!?!? I can not find one anywhere. Has anyone had this issue? I don’t know if it makes a difference but I’m in Commiefornia. Any info would be greatly appreciated!!!!
     

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