[Main 9000 Bulletin Board | BBFAQ | Prev by Date | Next by Date | Post Followup ] Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos Just replace the darn battery! Like This Post: - Subscribe to Daily Digest for this Bulletin Board Posted by Ari [Email] (#2847) [Profile/Gallery] (more from Ari) on Sun, 10 Jun 2007 16:54:51 In Reply to: starting problem worsens with good battery charge, aaron, Sun, 10 Jun 2007 10:12:52 Alert me when someone posts in this thread: Members do not see ads below this line. - Help Keep This Site Online - Signup

Everything you're seeing is likely a bad battery. The voltage when the engine is running is just fine - mid 13's, so the alternator is OK. Leave it be.

This battery has been discharged a bunch of times. Each time a battery gets fully discharged, it loses life. Three years and a few discharges, and the battery is probably shot. What happens is that the plates get sulfated up - they lose surface area. That doesn't impact the no load voltage, but it does impact the current capability. It may seem charged, but it is like you stuck 8 AAA cells in there - you'll see 12 volts with no load, but a few AAA cells won't start a car.

When you first turned the key to ON, you read the battery voltage of 12 (the alternator doesn't produce voltage until the engine is turning). Not unreasonable for a battery with minimal electrical load.

When you did mange to start the car, the voltage dropped WAY down. That killed the always on power bus to the radio and clock. They can work with pretty low voltages, but the battery went down below that. The same as removing and reinstalling the battery.

A classic weak battery will appear to charge up very quickly, drive just fine, and then lose charge very quickly - overnight, or a matter of hours. The only fix is replacement. Once the plates get sulfated, they stay that way.

posted by 76.204.145...

• starting problem worsens with good battery charge, aaron, Sun, 10 Jun 2007 10:12:52
  • Re: starting problem worsens with good battery charge, Steak, Mon, 11 Jun 2007 07:56:57
  • Just replace the darn battery!, Ari , Sun, 10 Jun 2007 16:54:51 <-- Viewing This Message
    • last night charged voltage 12.95, this morning 11.42, aaron, Mon, 11 Jun 2007 05:34:40
    • thanks for advice, i think i will, only thing was..., aaron, Sun, 10 Jun 2007 16:58:12
      • april 24th, aaron, Sun, 10 Jun 2007 17:20:27
      • How many times has it crapped out in the last 2 months?, Ari , Sun, 10 Jun 2007 17:02:44
        • Re: How many times has it crapped out in the last 2 months?, aaron, Sun, 10 Jun 2007 17:18:07
  • Re: starting problem worsens with good battery charge, Paul Clifton, Sun, 10 Jun 2007 13:07:29
    • thanks... both of those would kill power to the clock?, aaron, Sun, 10 Jun 2007 13:32:43
      • haha, it continues... to get worse, or better i don't.., aaron, Sun, 10 Jun 2007 15:46:30
        • Re: New Battery, Paul Clifton, Tue, 12 Jun 2007 11:15:11

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• Prev by Date: Nope, Ari, Sun, 10 Jun 2007 16:46:27
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