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Having a misfire but can't locate anyone with same problem

Discussion in '1st Gen Tundras (2000-2006)' started by Chris.m, Jun 19, 2025.

  1. Jun 28, 2025 at 7:20 PM
    #61
    Dustdog

    Dustdog New Member

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    resistance is going down as temp goes up.

    A good trick is to also test it in a bowl of ice water as you know that will be 32F. Its possibe for thermistors to be good at a particular temp but be out of whack compared to their design curve. So having multiple readings is a good idea.

    Although Im not sure how the coolant temp is leading to a misfire on only one side.
     
  2. Jul 1, 2025 at 2:42 PM
    #62
    Chris.m

    Chris.m [OP] New Member

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    I couldn't locate a denso coolent temperature sensor online or at autoparts stores so I bought a delphi
     
  3. Jul 1, 2025 at 2:43 PM
    #63
    Chris.m

    Chris.m [OP] New Member

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    I don't neither bit it says in the its one of the causes for a misfire
     
  4. Jul 2, 2025 at 3:23 AM
    #64
    bmf4069

    bmf4069 Michelob Ultra coinesour

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    Do you have any weird pops or backfires?
     
  5. Jul 2, 2025 at 11:03 AM
    #65
    Chris.m

    Chris.m [OP] New Member

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    Sometimes I can here a pop out the exhaust if I rev it up and down fast. But I don't remember at idle or a steady high rpm
     
  6. Jul 2, 2025 at 5:17 PM
    #66
    Chris.m

    Chris.m [OP] New Member

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    So I pulled out the crank sensor and tested it. It had a like a real fine black soot stuck to it when I pulled it out. Here's the reading I get. Can you tell me if I have it set to the right ohms? I get weird readings on the others and at 2k I get nothing.

    20250702_171044.jpg
    20250702_171105.jpg
    17515018105083956013208355288201.jpg
     
    KNABORES likes this.
  7. Jul 2, 2025 at 6:08 PM
    #67
    Fragman

    Fragman New Member

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    Looks like practically a short to me. You've got the meter set to continuity. Is it beeping?
     
  8. Jul 2, 2025 at 6:15 PM
    #68
    Chris.m

    Chris.m [OP] New Member

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    No beeping
     
  9. Jul 2, 2025 at 6:16 PM
    #69
    Chris.m

    Chris.m [OP] New Member

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    What should I set it to
     
  10. Jul 2, 2025 at 6:24 PM
    #70
    Jack McCarthy

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    It might be right. Set it to 200; you should see the same value if it’s correct.

    If those are commas in the spec, put it to 2k ohm reading instead.
     
  11. Jul 2, 2025 at 6:31 PM
    #71
    Chris.m

    Chris.m [OP] New Member

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    I put to 2k and it quickly flashes 1,800 the goes to 1. And won't read anything. This was yhe black stuff that was stuck to when I pulled it . Turns to like black ash when you rub it between your fingers

    20250702_182819.jpg
     
  12. Jul 2, 2025 at 6:33 PM
    #72
    Jack McCarthy

    Jack McCarthy Working remotely from the local pub

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    That means you’re not getting good continuity for the reading. Try cleaning it with some q-tips and 90% alcohol (the contacts). That is just metal, right?
     
    Last edited: Jul 2, 2025 at 6:38 PM
  13. Jul 2, 2025 at 6:34 PM
    #73
    Chris.m

    Chris.m [OP] New Member

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    If the alligator clips touch it beeps
     
  14. Jul 2, 2025 at 6:36 PM
    #74
    Chris.m

    Chris.m [OP] New Member

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    It's like fiber stick to your finger but turns to black powder
     
  15. Jul 2, 2025 at 6:36 PM
    #75
    Fragman

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    That's what it should do in continuity mode, so that's good. a -1- with no other digits usually means Open, as in no continuity at all, infinite resistance. Try cleaning the contacts as Jack suggested.
     
  16. Jul 2, 2025 at 6:38 PM
    #76
    Chris.m

    Chris.m [OP] New Member

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    Alright thanks
     

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