Saturn SC2 Hot Start Problem

Discussion in 'General Motoring' started by kim_lombard, Feb 11, 2007.

  1. kim_lombard

    kim_lombard Guest

    I have a "new" Saturn. It's a 1999 SC2, same 1.9 Liter engine
    as the others.

    Problem is that it start fine when cold. After
    driving for 10 minutes or so, I turn the engine off at
    the store. Walk out after 2-3 minutes and turn key.
    NO START. the starter doesn't turn over. Doesn't
    even click the solenoid.

    I wait another 5-10 minutes and it starts right up. No
    problem. I changed the temperature sensor on the
    block with a new one. No help.

    Any ideas? Car runs great, other than this "Hot
    Start" problem.

    By the way. NO check engine light. NO battery low or
    charge light. Once it sits for a few minutes, turning
    the ignition off, then on - it starts like normal. Go

    kim_lombard, Feb 11, 2007
  2. kim_lombard

    Bob Shuman Guest

    If you do not even get a "click", then I'd suspect one of the following:

    corroded/dirty or loose battery, starter, or engine block connection
    defective or dirty starter solenoid contacts
    defective starter relay
    defective ignition cylinder switch
    Bad battery (not likely, but there could be an open cell)

    I'm not sure why it behaves differently when cold or warm. You also do not
    say if the lights, radio, blower fan, etc. all still work or not when it
    will not start. My guess is this may not be dependent on the temperature
    so keep your eye on this ... at the minimum, I'd remove, clean (with a wire
    brush), and tighten both the positive and negative battery posts and
    connectors. I'd also do the same with the engine block and starter
    connections as well while the battery is disconnected.

    Good luck

    Bob Shuman, Feb 11, 2007
  3. kim_lombard

    kim_lombard Guest

    All other electrical functions are "normal", radio, heater, lights,
    dash, etc. function. Its just the "brains" between the ignition
    switch and the starter that seem faulty. As I said, after a few
    minutes more cooling time it starts normally. Battery functions the
    same, start turns over and start just like normal, no noticable drain
    on the batter. Not even a hard start. thanks.

    kim_lombard, Feb 11, 2007
  4. kim_lombard

    Skip Guest

    I would suspect a bad starter, based on your description of symptoms.
    When the starter gets hot, the resistance in the unit goes to infinity
    and "locks up". Good Luck...
    Skip, Feb 12, 2007
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