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Lost power

Discussion in '1st Gen. Tacomas (1995-2004)' started by OFTdrillerman, Aug 1, 2020.

  1. Aug 1, 2020 at 4:48 PM
    #1
    OFTdrillerman

    OFTdrillerman [OP] Well-Known Member

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    3" lift, K&N Cold air intake
    I have an 04 TRD with the V6 and a 5 speed. The truck seems to loose power and almost bog down at wide open throttle. You can let off the throttle to around 3/4s or half and can notice a improvement in acceleration. I’ve changed the fuel filter recently with no real improvement. Looking for suggestions. The truck has 147,000 miles.
     
  2. Aug 1, 2020 at 4:50 PM
    #2
    joshuajayg

    joshuajayg Well-Known Member

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    Check engine light? Look for codes via OBD2 port?
     
  3. Aug 1, 2020 at 4:53 PM
    #3
    OFTdrillerman

    OFTdrillerman [OP] Well-Known Member

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    3" lift, K&N Cold air intake
    Forgot to mention, no check engine light. Will it have a code with no check engine light?
     
  4. Aug 1, 2020 at 5:04 PM
    #4
    JaCado

    JaCado Water Janitor

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    Oxygen sensors, catalytic converters, maf.
    Have all of these been determined to be good?
     
  5. Aug 1, 2020 at 5:08 PM
    #5
    OFTdrillerman

    OFTdrillerman [OP] Well-Known Member

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    3" lift, K&N Cold air intake
    Wouldn’t those cause a check engine light?
     
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  6. Aug 1, 2020 at 5:10 PM
    #6
    Steves104x4

    Steves104x4 Well-Known Member

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    Buffalo NY
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    BUCKLE UP! It makes it harder for Aliens to pull you out of your Truck.
    Dry rotted vacuum lines, maybe
     
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  7. Aug 1, 2020 at 5:11 PM
    #7
    JaCado

    JaCado Water Janitor

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    Typically, yes. But sometimes no.
    Any alternator issues on it
     
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  8. Aug 1, 2020 at 5:12 PM
    #8
    OFTdrillerman

    OFTdrillerman [OP] Well-Known Member

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    3" lift, K&N Cold air intake
    No alternator issues.
     
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  9. Aug 1, 2020 at 5:13 PM
    #9
    JaCado

    JaCado Water Janitor

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    Fuel pump?
     
  10. Aug 1, 2020 at 5:13 PM
    #10
    Clearwater Bill

    Clearwater Bill Sometimes when I close my eyes, I can't see.

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    A few OE parts from fancy trucks
    A converter (or even a muffler) that is in the process of clogging through interior decay can clog the exhaust stream and deteriorate high load performance quickly.

    Sometimes tapping on those will cause a rattle that gives you a hint.

    If it is one of those the condition will worsen until it won't run at all. Could be gradual, could be sudden.
     
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  11. Aug 1, 2020 at 5:14 PM
    #11
    OFTdrillerman

    OFTdrillerman [OP] Well-Known Member

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    3" lift, K&N Cold air intake
    No issues cranking or idling, no missing or hiccups
     
  12. Aug 1, 2020 at 5:15 PM
    #12
    JaCado

    JaCado Water Janitor

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    Except..... loss of power at high rpm, correct?
     
  13. Aug 1, 2020 at 5:21 PM
    #13
    OFTdrillerman

    OFTdrillerman [OP] Well-Known Member

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  14. Aug 1, 2020 at 5:23 PM
    #14
    joshuajayg

    joshuajayg Well-Known Member

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    You can have codes with no check engine light. Worth checking.
     
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  15. Aug 1, 2020 at 5:23 PM
    #15
    OFTdrillerman

    OFTdrillerman [OP] Well-Known Member

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    3" lift, K&N Cold air intake
    Only at full throttle. If you only give it around 3/4 throttle it will accelerate like it should just seems to bog down when at full throttle.
     
  16. Aug 1, 2020 at 5:24 PM
    #16
    OFTdrillerman

    OFTdrillerman [OP] Well-Known Member

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    3" lift, K&N Cold air intake
    Will have it checked for codes on Monday
     
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  17. Aug 1, 2020 at 5:24 PM
    #17
    JaCado

    JaCado Water Janitor

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    OFTdrillerman [OP] likes this.
  18. Aug 1, 2020 at 5:44 PM
    #18
    OFTdrillerman

    OFTdrillerman [OP] Well-Known Member

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    3" lift, K&N Cold air intake
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  19. Aug 1, 2020 at 5:55 PM
    #19
    joshuajayg

    joshuajayg Well-Known Member

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    My first two guesses are you throttle position sensor is faulty and is giving the wrong signal at peddle full down or you don't have sufficient fuel pressure.

    Best of luck.
     
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  20. Aug 1, 2020 at 6:00 PM
    #20
    OFTdrillerman

    OFTdrillerman [OP] Well-Known Member

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    3" lift, K&N Cold air intake
    Thanks
     

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