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1st gen 105 amp bolt in alternator.

Discussion in '1st Gen. Tacomas (1995-2004)' started by chagovatoloco, Sep 21, 2019.

Page 16 of 24
  1. Apr 26, 2021 at 7:45 PM
    #301
    Dan8906

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    Dan8906 Well-Known Member

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    Question. So I replaced the alt to fuse box with 2 gauge, sounds like you went straight to the battery, so did you run nothing back to the fuse box?
     
    Dan8906, Apr 26, 2021
    #301
  2. Apr 26, 2021 at 7:53 PM
    #302
    OpeCity

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    OpeCity Well-Known Member

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    Oh sorry, I misunderstood. I thought you meant you changed to a 3-wire alternator, not just changed the wires
     
    OpeCity, Apr 26, 2021
    #302
  3. Apr 26, 2021 at 8:32 PM
    #303
    1997tacomav6

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    Mmmmm
    Mine stays at 14.2 all the time
     
    Last edited: Apr 27, 2021
    1997tacomav6, Apr 26, 2021
    #303
  4. Apr 28, 2021 at 12:14 AM
    #304
    TacoBike

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    TacoBike The Researcher

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    Isnt that just determined by the pads on the alternator? At some point its definitely because of power draw but Sometimes even completely stock its lower in the 13.5 range?
     
    TacoBike, Apr 28, 2021
    #304
  5. Apr 28, 2021 at 7:30 AM
    #305
    1997tacomav6

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    My stock old alternator would hit 13 plenty of times
     
    1997tacomav6, Apr 28, 2021
    #305
  6. Apr 28, 2021 at 8:18 AM
    #306
    Dan8906

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    Dan8906 Well-Known Member

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    So I noticed it starts to drop as soon as the RPMs drop below 700. Does your truck idle lower than 700 ?
     
    Dan8906, Apr 28, 2021
    #306
  7. Apr 28, 2021 at 1:53 PM
    #307
    1997tacomav6

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    My truck idle is around 800rpms give or take

    20210428_145223.jpg
     
    1997tacomav6, Apr 28, 2021
    #307
    Dan8906[QUOTED] likes this.
  8. Apr 28, 2021 at 9:54 PM
    #308
    Dan8906

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    Dan8906 Well-Known Member

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    My idle drops to 600-650 and the voltage drops after 700-750

    7C38806C-B46D-4D94-8B0D-8B877EF07511.jpg
     
    Dan8906, Apr 28, 2021
    #308
  9. Apr 28, 2021 at 10:08 PM
    #309
    Empty_Lord

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    Empty_Lord Toyotaholic

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    The voltage dropping to 13.5ish at idle once the trucks warm and the battery is charged is normal. Anything below 13 I’d say would be concerning



    you have a good battery for sure? Has it been tested for a bad cell? All connections are solid? There is also the possibility the alternator is just weak.. warranty that one out maybe? A lot of variables exist
     
    Empty_Lord, Apr 28, 2021
    #309
  10. Apr 28, 2021 at 10:20 PM
    #310
    Dan8906

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    Dan8906 Well-Known Member

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    Battery is good newish 2x power agm . I didn’t have this issue pre big 3 upgrade it was always 14.2 volts but I’ve gone through every connect to double check i don’t see any issues. Not sure what could have changed
     
    Last edited: Apr 28, 2021
    Dan8906, Apr 28, 2021
    #310
  11. Apr 28, 2021 at 10:26 PM
    #311
    Area51Runner

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    Area51Runner Well-Known Member

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    What I would do, if you still have them of course - put the stock wiring back in and see if you can reproduce the drop off. If you can, then you know its your 'upgraded' wiring.

    I know that sounds like crap but it will either rule out the wiring upgrade or confirm it to be the issue. PITA but will give you an answer.
     
    Area51Runner, Apr 28, 2021
    #311
  12. Apr 28, 2021 at 10:28 PM
    #312
    Dan8906

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    Dan8906 Well-Known Member

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    Yeah I was thinking about that. It really wouldn’t be terrible, start with just the alt wire. I really can’t see how that would be the issue being that the drop is very dependent on the rpms. But maybe it’s worth a shot
     
    Dan8906, Apr 28, 2021
    #312
    Area51Runner[QUOTED] likes this.
  13. Apr 28, 2021 at 10:31 PM
    #313
    Empty_Lord

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    Empty_Lord Toyotaholic

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    Too many trucks and mods to list.. check builds
    What kind of wire was used when you upgraded? A lot of wire out there is copper clad aluminium.. that could be an issue.


    Also with the x2, you may want to look into a voltage booster on top. Of all this. I think 14.7 is the ideal voltage
     
    Empty_Lord, Apr 28, 2021
    #313
    Area51Runner likes this.
  14. Apr 28, 2021 at 10:31 PM
    #314
    Area51Runner

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    Area51Runner Well-Known Member

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    Its tedious but something I picked up in the good ol' QA test days. First item on the list, reproduce the issue. :thumbsup:
     
    Area51Runner, Apr 28, 2021
    #314
    Dan8906[QUOTED] likes this.
  15. Apr 28, 2021 at 10:32 PM
    #315
    Dan8906

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    Dan8906 Well-Known Member

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    any suggestion on a voltage booster?

    here’s the wire I used
    $87 EWCS 2 Gauge Premium Extra Flexible Welding Cable 600 Volt Combo Pack - Black+Red - 10 Feet of Each Color - Made in The USA
    https://www.amazon.com/dp/B0167K7DO2/ref=cm_sw_r_cp_api_glt_fabc_80PT6NM3S39ZDMX054JJ?_encoding=UTF8
     
    Dan8906, Apr 28, 2021
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  16. Apr 28, 2021 at 10:34 PM
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    Empty_Lord

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    Empty_Lord, Apr 28, 2021
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  17. Apr 28, 2021 at 10:35 PM
    #317
    Area51Runner

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    Area51Runner, Apr 28, 2021
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  18. Apr 28, 2021 at 10:35 PM
    #318
    Dan8906

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    Dan8906 Well-Known Member

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    I’ll double check again and try swapping wires back to stock and see if I can reproduce
     
    Dan8906, Apr 28, 2021
    #318
  19. Apr 28, 2021 at 10:36 PM
    #319
    Dan8906

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    Dan8906 Well-Known Member

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    That statement isn’t true though right?
     
    Dan8906, Apr 28, 2021
    #319
  20. Apr 28, 2021 at 10:48 PM
    #320
    Area51Runner

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    Area51Runner Well-Known Member

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    I saw the 'voltage transfer' and just jumped on it :anonymous:

    Yeah, you're right. lol. I still like to read all the shit reviews. Still, you never know when dealing with Amazon or Fleabay. :notsure:
     
    Area51Runner, Apr 28, 2021
    #320
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