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Battery failing

Tiny
KELLYB5280
  • MEMBER
  • 1997 FORD EXPLORER
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 150,000 MILES
1997 ford explorer. Just changed brakes and wouldn't start. Took battery to Midas for recharge. Started perfectly but now when car is stopped like at a stop light the battery falls but as soon as you gas it, it goes back to middle. Any guesses?
Tuesday, November 16th, 2010 AT 3:55 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,117 POSTS
Alternator? Have checked also load test battery Have the battery fully recharged again and have it load tested at a parts store to see if it holds up. Alsol, have the alternator tested. Unless the idle is really low, the alt should maintain a good charge.

Let me know what you find. Also, most part stores will check both for free.
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Tuesday, November 16th, 2010 AT 4:28 PM
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
After the battery is disconnected, it takes several drive cycles for the computer(PCM) to relearn it's parameters, give it a week and see if corrects. Is the check engine light on?
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Tuesday, November 16th, 2010 AT 4:32 PM
Tiny
KELLYB5280
  • MEMBER
  • 2 POSTS
The check engine light is on. We had the engine replaced on the side last year. When I had it checked at auto zone they said it was the o2 sensor.
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Tuesday, November 16th, 2010 AT 6:50 PM

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