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Car idles low after battery was replaced

  • 26-04-2013 9:54am
    #1
    Cienciano
    Registered Users, Registered Users 2 Posts: 14,312 ✭✭✭✭


    Does anyone know if changing a car battery effects the idle speed? Its a modern enough car (06 swift).
    Battery needed to be replaced, did that and made sure the terminals were disconnected for as little time possible. Car is fine, but idle seems to be very low now. Thought it was going to cut out at lights.
    Any if the battery disconnected caused this, and how do I adjust it?


Comments

  • #2
    deandean
    Registered Users, Registered Users 2 Posts: 2,237 ✭✭✭deandean


    That's happened me too. It sorted itself out after a day or two. i don't know what the cause is.


  • #3
    biko
    Registered Users, Registered Users 2 Posts: 81,220 ✭✭✭✭biko


    Possibly the ECU recalibrating.


  • #4
    Cienciano
    Registered Users, Registered Users 2 Posts: 14,312 ✭✭✭✭Cienciano


    Cheers, I'll leave it a few days and see how it goes. Ah, back in the old days you just turned a screw on the carbs.


  • #5
    Muckie
    Registered Users, Registered Users 2 Posts: 1,763 ✭✭✭Muckie


    Car's ecu is relearning the old stored values, should be normal after a quick drive.


  • #6
    F1 fanatic
    Registered Users Posts: 66 ✭✭F1 fanatic


    I have a similar problem with my pajero pinin GDI.

    Have found info for this engine saying the ECU enters learn mode once the battery is replaced.

    1. To teach the GDI engine you need warm the engine first.
    2. Then restart the car with no electrical equipment on. leave the engine running for 10 mins. (during this time the engine revs will be hunting).
    3. Stop the engine for 15 seconds.
    4. restart the engine with as many electrical devices on as possible (wipers, lights, radio Air con etc.) and leave running for 10 mins.
    5. Repeat steps 3 & 4.

    After this the engine stays in learn mode for 800km

    The swift might have some similar learn mode


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  • #7
    Cienciano
    Registered Users, Registered Users 2 Posts: 14,312 ✭✭✭✭Cienciano


    Cheers, sorted. You're right, car is fine after a longer drive.


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