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Thread: 93 sc auto dying in long traffic

  1. #1
    Join Date
    Jun 2002
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    ny\long island
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    93 sc auto dying in long traffic

    hi guys n gals my 93 sc auto dies in very long traffic jams. new battery, alternator have been replaced months ago............still long traffic ( almost stand still ) on the throgs neck bridge go to bx..leaving long island. i also have underdrive pullies . my thing is........at isle( factoty setting) sitting in travvic on parkway....my car is almost out of juice by the time i get to bx. ive changed my factory alt twice in the last 2 years.. wth?.......this is my daily so i don't get it. regular traffic........no problem...i checked my charging system.13 and half volts steady at idle with lights on heat, etc. u get me in 35 mins of heavy traffic. i gotta do 2 feet driving lol then. she dead . so with that being said.............is the underdrive pullies not charging enough...........? when i put my foot on the gas..light brighten up. so what i have is.............not enough steady charging my alternator in long traffic. fixes.........1 taking off the underdrive pullies and going back to stock to get my factory charging idle.............. 2 upgrading my alternator to 6 g. question.........since the factory crank pulley is balanced with factory balancer.will mine wobble bc i have a bhj balancer on car now? thx in advance.

  2. #2
    Join Date
    Aug 2004
    Location
    KSRQ
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    5,201
    Quote Originally Posted by pock1 View Post
    hi guys n gals my 93 sc auto dies in very long traffic jams. new battery, alternator have been replaced months ago............still long traffic ( almost stand still ) on the throgs neck bridge go to bx..leaving long island. i also have underdrive pullies . my thing is........at isle( factoty setting) sitting in travvic on parkway....my car is almost out of juice by the time i get to bx. ive changed my factory alt twice in the last 2 years.. wth?.......this is my daily so i don't get it. regular traffic........no problem...i checked my charging system.13 and half volts steady at idle with lights on heat, etc. u get me in 35 mins of heavy traffic. i gotta do 2 feet driving lol then. she dead . so with that being said.............is the underdrive pullies not charging enough...........? when i put my foot on the gas..light brighten up. so what i have is.............not enough steady charging my alternator in long traffic. fixes.........1 taking off the underdrive pullies and going back to stock to get my factory charging idle.............. 2 upgrading my alternator to 6 g. question.........since the factory crank pulley is balanced with factory balancer.will mine wobble bc i have a bhj balancer on car now? thx in advance.

    Hello Tony. Pull the under-drive pulleys to see if that is the issue. It probably won't be but you have to be sure. What you do want to do is take the heat soak off the starter. Wrap it in header rap. Bet that solves the problem.

  3. #3
    Join Date
    May 2002
    Location
    Dallas, TX
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    5,717
    Quote Originally Posted by pock1 View Post
    13 and half volts steady at idle with lights on heat, etc.
    Thats not enough charging voltage. Good alternators are hard to come by these days. The remans are not that great, and new ones are hard to even find. I'd recommend swapping the pulleys out and see if it helps, but you may have to take it in and have it tested again.

    Also, remember.. don't charge a dead battery by running the car and letting the alt do the work. They don't stand up long that way. Its a design flaw, but something about the increased heat load. To be safe, if the battery gets drained, put it on a charger.

  4. #4
    Join Date
    May 2012
    Location
    Denver Area
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    822
    Shouldn't a good alternator put out about ~14.4 VDC?

  5. #5
    Join Date
    Dec 2007
    Location
    Salem OR
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    Quote Originally Posted by potshotscott View Post
    Shouldn't a good alternator put out about ~14.4 VDC?
    Sure, but when it's spinning slower due to a pulley mod, that can drop to an unhelpful level.

  6. #6
    Join Date
    Jun 2002
    Location
    ny\long island
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    2,697

    pullies

    Thx guys for the input, if I go back to factory pullies will my stock crank pulley be out of balance?

  7. #7
    Join Date
    Apr 2002
    Location
    St. Louis, MO
    Posts
    6,480
    If I recall, the ASP underdrive pulleys I bought years ago advertised full charge around 900 rpm. I agree that I'd start with the pulleys.
    Kurt K (e-mail)
    SCCoA Member #: 443
    '92 SC AOD -- 11.521s @ 116.748mph, 2.0 AR power
    . . . . . . . . . -- 13.547s @ 101.01 mph, only w/ bolt-ons
    '95 SC 5spd -- All Stock, except 17" Simmons wheels.
    '90 SC 35th Anny 5spd -- 3rd owner, 16k miles
    2 '89 XR7 5spd's -- on their way out, really!

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