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Old 08-06-2010, 09:06 AM   #17
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Join Date: Mar 2009
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Location: Pen Argyl, PA, PA
What I Drive: 2004 Blue ZTW Wagon, 2.3 L Duratec

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If you know someone that can work on the car, unless you do yourself, not trying to be patronizing. Once the car is started, disconnect one of the battery cables. Once the battery is disconnect the car is running completely off of the alternator, which is it's purpose. If the car dies, as it probably will, the alternator is the fault. As somone else stated, if it isn't able to put out enough power, the car will draw from the battery and as you drive faster the car draws more power, so something has to give. If your battery went bad, or went dead, charging it could have killed the alternator. Modern alternators are only designed to run the car and slightly charge a battery, they cannot put out the power needed to recharge a depleted battery, it burns out the regulator. Good luck, I'd offer to help but the commute would kill me.
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