1964 Plymouth Valiant Power Issue

Early A-Body Discussions

  1. 185cafe

    185cafe New Member

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    Hi everyone,
    I'm working on a 1964 Plymouth Valiant v100 and have some type of power issue with it. The car starts and runs nice at idle, but the alternator gauge either stays directly in the center (if no headlights or other power drawing things are on), or goes down into the "not charging" side if the headlights are turned on. The gauge never goes past the center and up into the "charging" side. It currently has a brand new battery, voltage regulator, coil, alternator, and Pertronix kit in the distributor. I've tested for power at the battery, voltage regulator, coil, and alternator and have power in all of those places.The car will run and drive but when accelerating it runs like it's missing and has a lack of power, and if it stalls while on a drive it barely has enough juice to start again. On a similar note, if I leave the car sit in the garage for a couple days it drains the battery. Does anyone have any ideas on what to try? Thanks in advance!
     
  2. bigaadams

    bigaadams Well-Known Member

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    start with use of a VOM and follow along with sop manual trouble shooting if you are not familiar with automotive charging systems and testing
     
  3. RedFish

    RedFish Well-Known Member

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    Your OEM alternator was the round back 36 amp closed field type. So it had only one spade terminal for the one little green wire. Did a part store hand you a later model alternator with two field terminals?
     
  4. RustyRatRod

    RustyRatRod 30 Degrees Outta Whack FABO Gold Member

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    Yes, RedFish makes a great point. The factory style is the round back (early) style. See if you can get a picture of yours from the back so we can tell which one it is.
     
  5. bigaadams

    bigaadams Well-Known Member

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    so, just ground one field lead if using the original style mechanical or replacement electronic regulator for the earlier cars...you can retro the two wire field setup to work on the one wire...you cannot however go the other way...
     
  6. RustyRatRod

    RustyRatRod 30 Degrees Outta Whack FABO Gold Member

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    We're gettin there. Wanted to find out what he HAS first before throwin what might be too much info at him. He may not be familiar with that mod.
     
  7. bigaadams

    bigaadams Well-Known Member

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    go back again to my first reply before even mentioning the forum mentions the two types of alternators, use a good VOM and proper test procedures...if unfounded in trouble shooting...he needs a few diagrams and procedures from the book...he may do best to farm this out if he has no experience in troubleshooting or if he does not have the meter and repair manual, save headaches, components and wiring harness from damage.

    but yes, I agree, if the man is not founded in the theory....a two wire could be confusing
     
    Last edited: Jul 14, 2019
  8. AJ/FormS

    AJ/FormS 68 B'cuda fb, Form S clone ... 367/A833/3.55s FABO Gold Member

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    I think he need a couple of batteries in the back, and a supercharger in the front, and a 5-point harness.
    But if it's a wagon, I'm kindof looking for a new home for my 367
     
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