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Rough idling after replacing battery

Discussion in '2.5 Gen Tundras (2014-2021)' started by Machado, Oct 19, 2020.

  1. Oct 19, 2020 at 4:16 AM
    #1
    Machado

    #1
    Machado [OP] New Member

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    Hi
    I had to replace the battery. Now, I'm in trouble.
    Does anyone know how to fix rough idling ?I
    2015 Toyota tundra 6.4l V8

    Thanks!
     
    Machado, Oct 19, 2020
    #1
    YardBird likes this.
  2. Oct 19, 2020 at 4:24 AM
    #2
    Tundra234

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    Tundra234 New Member

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    Alot of them
    A battery shouldn't cause that.. Is it surging? I bet the throttle body is dirty.
     
    Tundra234, Oct 19, 2020
    #2
  3. Oct 19, 2020 at 4:29 AM
    #3
    Nm6300'asl

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    Nm6300'asl New Member

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    How long did u let it run after replacing battery? The ecu needs some time to learn.
     
    Nm6300'asl, Oct 19, 2020
    #3
    grichg, YardBird and Machado[OP] like this.
  4. Oct 19, 2020 at 5:13 AM
    #4
    Machado

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    Machado [OP] New Member

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    Maybe 3 minutes.
     
    Machado, Oct 19, 2020
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  5. Oct 19, 2020 at 5:42 AM
    #5
    YardBird

    #5
    YardBird Native San Diegan

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    SoCal.jpg
    The ECM will take awhile to adjust after disconnecting the battery. Drive the vehicle and give us an update on your results.
     
    YardBird, Oct 19, 2020
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    Machado[OP] likes this.
  6. Oct 19, 2020 at 6:03 AM
    #6
    Bakershack

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    Bakershack Critical of Noncritical Thinkers

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    Welcome from LA (Lower Alabama)! Hopefully some running time will allow the ECU to get everything running smoothly again. If not, the folks here are pretty knowledgeable and will help you figure it out.
     
    Bakershack, Oct 19, 2020
    #6
    Machado[OP] likes this.
  7. Oct 19, 2020 at 7:00 PM
    #7
    TXRailRoadBandit73

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    TXRailRoadBandit73 YOTAS,RAILROADIN',RÖKnRÖLLN',BEER,MAX/GEMMA

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    Welcome
     
    TXRailRoadBandit73, Oct 19, 2020
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    Machado[OP] likes this.
  8. Oct 28, 2020 at 8:12 AM
    #8
    Machado

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    Machado [OP] New Member

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    thank you guys!
    After driving for 2 minutes, everything returned to normal.
     
    Machado, Oct 28, 2020
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    1lowlife, Leo's first, RitcheyRch and 1 other person like this.
  9. Oct 28, 2020 at 8:24 AM
    #9
    YardBird

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    YardBird Native San Diegan

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    [​IMG]
     
    YardBird, Oct 28, 2020
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    Leo's first and NewImprovedRon like this.
  10. Oct 28, 2020 at 1:29 PM
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    kevine0001

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    kevine0001 New Member

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    I just replaced my battery an hour ago. First start felt like it stuttered and it shut off. I turned it again, no problems. Drove it around, no problems.
     
    kevine0001, Oct 28, 2020
    #10
  11. Oct 28, 2020 at 1:36 PM
    #11
    Danman34

    #11
    Danman34 New Member

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    Every tundra does that after reconnecting the battery.
     
    Danman34, Oct 28, 2020
    #11
    kevine0001[QUOTED] likes this.
  12. Oct 28, 2020 at 1:38 PM
    #12
    grichg

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    grichg New Member

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    and tacomas etc...
     
    grichg, Oct 28, 2020
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    Danman34[QUOTED] and Machado[OP] like this.
  13. Oct 29, 2020 at 6:47 PM
    #13
    socaltundra951

    #13
    socaltundra951 Gentlemen Prefer Black Tundras

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    Probably that 6.4L V8 you have in there, truck was never designed to run with something that big wedged in the engine bay! :D:thumbsup:

    Glad you got it figured out and welcome from socal.
     
    socaltundra951, Oct 29, 2020
    #13
  14. Oct 29, 2020 at 6:54 PM
    #14
    Suprafantx

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    Suprafantx New Member

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    As I remember, I think you need to drive about 40 miles for ECU to learn.
     
    Suprafantx, Oct 29, 2020
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    kevine0001 likes this.
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