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Battery or alternator?

Discussion in 'Off-Topic' started by Stape, Aug 1, 2019.

  1. zboys

    zboys NES Member

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    I'm thinking something else may be going on, a brand-new battery will not make your car run weak and stall at idle that fast
     
  2. Stape

    Stape

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    Well, it all started when I left my lights on...
     
  3. mac1911

    mac1911 NES Member

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    maybe it lost its idle strategy?
     
  4. MisterHappy

    MisterHappy NES Member

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    On the 16 yard line, shootin' for the Lewis!
    I do it (pop start) frequently. It's how I save electricity.
     
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  5. falcon123

    falcon123 NES Member

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    Not many manual transmissions around today.
     
  6. AHM

    AHM NES Member

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    Damn, Jack; I knew you were hardcore, but that's what I call prepared.
    [​IMG]
    Yahbut, you did click the link, right?

    That was a puzzler (or some such regular feature) on Car Talk.
     
  7. AHM

    AHM NES Member

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    [​IMG]
     
  8. TLB

    TLB

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    I have popped the clutch solo on a flat in my younger days...
     
  9. lowbuckbob

    lowbuckbob NES Member

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    Scuba tank? Were you going for a ride with Ted Kennedy?
     
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  10. mac1911

    mac1911 NES Member

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    plus newer cars need a minimum of voltage to even get the electronics fired up!
     
  11. JayMcB

    JayMcB NES Member

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    Here's the thing.
    A fully charged 12V battery will be at about 12.6V with a full top charge and 6 good cells.
    A running vehicle with a good alternator will put out 13.6-14.6V, except some POS alternators that decide not to charge at idle for fuel economy...like some Hondas.
    If the voltage output goes below about 13.2 running, the idiot light goes on. If the light is on, your alternator is junk....or the belt and tensioner just blew off it
     
  12. falcon123

    falcon123 NES Member

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    I use my hearing aid battery for that.
     
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  13. drgrant

    drgrant Moderator NES Member

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    This is all mostly true, except I think on some cars the set point for that light is different. That's what I was trying to get at. I think it is possible to have a dead alt and not have that light come on immediately, at least for a window of time. I think the set point for the light
    activating is different on different cars. The car started wonky (like it was already f***ed up) and the light never came on until things started to get bad... so this tells me at least in the ES330, that set point for throwing that light is linked to the voltage of the battery, and the set point for that light is certainly well below 13vdc. Hell my HF rig shut off (and wouldn't turn back on!) before that light came on (and those don't like to be below 12, which makes me think the set point is likely below 12 on that car.... )

    Also... after I had that car towed I had left a charger on that battery overnight. I don't remember the "battery light" coming on when I moved the car into my yard, granted I only started it up once and moved it in under a minute, so it didn't exactly have a lot of time to discharge...

    -Mike
     
  14. AHM

    AHM NES Member

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    [​IMG]
    P. S. That's Kim's upstairs neighbor lady.
     
  15. DavidC77

    DavidC77 NES Life Member NES Member

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