Battery

Discussion in 'Technical' started by Jett, Dec 27, 2014.

  1. Jett

    Jett Member

    Joined:
    Jul 21, 2012
    Messages:
    218
    Likes Received:
    14
    Trophy Points:
    35
    Location:
    Los Angeles
    Vehicle:
    1976 Mercury Comet L6 250 ci
    Hi Guys!

    Happy holidays.

    I have a simple question, my battery died, it was a 800 crank and at the shop they told me I only needed a 715 so it's what I got and since then it has been tough to start it in the morning and even harder at night so I was guessing "it's the cold" but I am now wandering if it's the battery which crank strength is too low or is my starter dead or dying?

    Thanks for the help (I have ruled out alternator malfunction)
     
  2. Bryant

    Bryant forgot more than learned

    Joined:
    Aug 7, 2007
    Messages:
    6,538
    Likes Received:
    153
    Trophy Points:
    203
    Garage:
    1
    Location:
    San Diego
    Vehicle:
    71 Maverick
    715cca should be fine. chances are your starter and or solenoid were damaged from when your battery was dying. as the voltage drops, the current increases. with increased current the contacts in the solenoid get burnt and the winding in the start over heat and can melt. it can also hurt the battery cables where the terminals are connected.
    voltage drop testing on the cables and solenoid will show if they are good or bad. if your getting full cranking voltage to the starter then the starter is probably damaged.
     
  3. Jett

    Jett Member

    Joined:
    Jul 21, 2012
    Messages:
    218
    Likes Received:
    14
    Trophy Points:
    35
    Location:
    Los Angeles
    Vehicle:
    1976 Mercury Comet L6 250 ci
    thank you for that detailed answer, I will test cables and solenoid then.

    Cheers!
     
  4. 71gold

    71gold Frank Cooper Supporting Member

    Joined:
    Apr 9, 2002
    Messages:
    26,590
    Likes Received:
    2,935
    Trophy Points:
    978
    Garage:
    1
    Location:
    MACON,GA.
    Vehicle:
    '73 Grabber
    so what did you find...:huh:



    J/K...:)
     
  5. Jett

    Jett Member

    Joined:
    Jul 21, 2012
    Messages:
    218
    Likes Received:
    14
    Trophy Points:
    35
    Location:
    Los Angeles
    Vehicle:
    1976 Mercury Comet L6 250 ci
    So it ended up being both the starter and the solenoid! The Starter was pumping too much juice so burnt the solenoid down!
    Changing both tomorrow. I will let you know when the car runs again.
    :D
     
  6. Bryant

    Bryant forgot more than learned

    Joined:
    Aug 7, 2007
    Messages:
    6,538
    Likes Received:
    153
    Trophy Points:
    203
    Garage:
    1
    Location:
    San Diego
    Vehicle:
    71 Maverick
    thats what i suspected. ive seen that many times. one will hurt the other. solenoids are cheap enough that they get replaced when ever i do a starter. also this is a good opportunity to switch to the light weight high torque starters ford went to in 92. i think the v8 starters will work on a I6 motor but not entirely sure.
     
  7. Jett

    Jett Member

    Joined:
    Jul 21, 2012
    Messages:
    218
    Likes Received:
    14
    Trophy Points:
    35
    Location:
    Los Angeles
    Vehicle:
    1976 Mercury Comet L6 250 ci
    Yes, for both parts I did not go for the cheap entry level so they might be a bit stronger.
     
  8. Jett

    Jett Member

    Joined:
    Jul 21, 2012
    Messages:
    218
    Likes Received:
    14
    Trophy Points:
    35
    Location:
    Los Angeles
    Vehicle:
    1976 Mercury Comet L6 250 ci
    hi and happy new year!
    I've finally changed the starter, the solenoid and the cables in between and now everything is back to normal! God way to kickstart the year.
    Also, even if no electrical problem would have surfaced, the starter was in a bad shape, previous owner might have used a cheap one as the gearing inside of it was not straight anymore and rubbing around wearing the housing.
     
  9. 71gold

    71gold Frank Cooper Supporting Member

    Joined:
    Apr 9, 2002
    Messages:
    26,590
    Likes Received:
    2,935
    Trophy Points:
    978
    Garage:
    1
    Location:
    MACON,GA.
    Vehicle:
    '73 Grabber
    ...:thumbs2:...
     
  10. Jett

    Jett Member

    Joined:
    Jul 21, 2012
    Messages:
    218
    Likes Received:
    14
    Trophy Points:
    35
    Location:
    Los Angeles
    Vehicle:
    1976 Mercury Comet L6 250 ci
    Hello all! I'm reviving this thread as it seams I may have a solenoid / starter problem.

    So I crank my car with the key, it starts on the go, stoles immediately, then it takes me quite a few turns of the key to actually get any crank, it's turning but no crank. Then hooks again and I'm golden for the day. Restart after every stop I need to make.
    Except saturday when even re starting hot had the same dance happening.

    I've tested the battery, it is still close to 100% full.
    I changed both my solenoid and starter a year ago + the cables going from battery to solenoid to starter.

    Any idea before I go taking the starter down as I feel the solenoid is still doing it's job? Kind of?
     
  11. Krazy Comet

    Krazy Comet Tom

    Joined:
    Sep 13, 2012
    Messages:
    7,736
    Likes Received:
    2,441
    Trophy Points:
    531
    Garage:
    1
    Location:
    Chesapeake VA
    Vehicle:
    1972 Comet GT clone 306 . 1969 Fairlane Cobra 428CJ 1988 T-Bird awaiting 331 ..
    If starter runs but no engagement it's likely a starter issue, if solenoid were bad I doubt it'd run at all... I have seen a combination of iffy starter and cables cause this issue...
     
  12. Jett

    Jett Member

    Joined:
    Jul 21, 2012
    Messages:
    218
    Likes Received:
    14
    Trophy Points:
    35
    Location:
    Los Angeles
    Vehicle:
    1976 Mercury Comet L6 250 ci
    Hi Tom,

    Thanks for your answer, the cables where changed with the starter, so I'm hoping they were good!
    I will drop down the starter for closer inspection then.

    Cheers!
     
  13. Jett

    Jett Member

    Joined:
    Jul 21, 2012
    Messages:
    218
    Likes Received:
    14
    Trophy Points:
    35
    Location:
    Los Angeles
    Vehicle:
    1976 Mercury Comet L6 250 ci
    so i've dropped the starter, it is filled with metal flakes and the wheel in the transmission shows signs of wear, my guess is it wouldn't fully engage hence not really crank.
    How could I test that?
    Thanks
     
  14. Krazy Comet

    Krazy Comet Tom

    Joined:
    Sep 13, 2012
    Messages:
    7,736
    Likes Received:
    2,441
    Trophy Points:
    531
    Garage:
    1
    Location:
    Chesapeake VA
    Vehicle:
    1972 Comet GT clone 306 . 1969 Fairlane Cobra 428CJ 1988 T-Bird awaiting 331 ..
    If starter engagement is properly set the starter should NOT run until it's seated fully in flywheel, as long as you still have 2/3 to 3/4 width of teeth you should be OK..... To check, remove the band and top cover(watch for pin which lever pivots on that will want to fall out).... Next depress the lever till drive starts to extend and look at contact on case under lever... If set properly the drive will be fully extended just as the contacts open, that's when motor actually starts to spin(or at least supposed to)...
     
  15. Jett

    Jett Member

    Joined:
    Jul 21, 2012
    Messages:
    218
    Likes Received:
    14
    Trophy Points:
    35
    Location:
    Los Angeles
    Vehicle:
    1976 Mercury Comet L6 250 ci
    the thing that got me to my conclusion is the side of the flywheel is worn out (a bit) as if the starter is spinning before getting into position.
    I've done what you suggested and mechanically it looks in order as you explained.
    So if it does not start spinning before reaching position then I might have a starter not reaching far enough in the transmission and spinning not being able to fully reach the flywheel, which would cause this wear and not starting well.
     

Share This Page