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idling low

Discussion in '2nd Gen. Tacomas (2005-2015)' started by rynophiliac, Jun 30, 2016.

  1. Jun 30, 2016 at 6:56 PM
    #1
    rynophiliac

    rynophiliac [OP] Member

    Joined:
    Nov 11, 2013
    Member:
    #116374
    Messages:
    6
    Gender:
    Male
    My battery just went out after 4 years. I used a jump box to start the truck and drove it down to the auto parts store had them test the alternator and battery which showed the alt was good but battery was bad. I replaced it but now the truck idles really low. I never really paid much attention to what it idled at before but now it runs around 400-500 and can shake a little when it gets real low. I'm not sure what would cause this as all I did was replace the battery? But I definitely don't understand these newer computer systems.
     
  2. Jun 30, 2016 at 7:22 PM
    #2
    Jimmyh

    Jimmyh Well-Known Member

    Joined:
    May 16, 2012
    Member:
    #78991
    Messages:
    11,802
    Gender:
    Male
    SC
    Vehicle:
    2012 Prerunner SR5
    It is normal to have an idle issue when the battery is disconnected and reconnected. It is in a learning mode for the ECU. Take it out and drive it a bit and it should straighten out.
     
  3. Jun 30, 2016 at 8:35 PM
    #3
    Tacotruck422

    Tacotruck422 Well-Known Member

    Joined:
    May 3, 2016
    Member:
    #186060
    Messages:
    79
    Gender:
    Male
    Seattle, Wa
    Vehicle:
    2015 DCLB
    Pro wheels, bilstein 5100's, 265/70/17 ko2's
    Take the intake box off and clean the throttle body. When the battery is disconnected and values reset the throttle plate closes all the way. When the tbody is dirty it has a hard time idling until it relearns (now learning that a dirty tb is normal)
     

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