 What Are the Symptoms of a Bad Alternator, ...will the car run off the battery |
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| 7TPorsh |
 Aug 21 2016, 06:56 PM
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7T Porsh  Group: Members Posts: 2,691 Joined: 27-March 06 From: Glendale Ca Member No.: 5,782 Region Association: Southern California 
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The other morning my car wouldn't crank; lights on dash but no juice. So I charge the battery up and start the car....drive around for a bit. Stop and start after half hour. OK
rive some more and get home...turn the car off and same thing; no juice. I take the battery to FLAPS who analyzes it and says it's bad....even though my meter says 12.5 volts. I get a new battery and installl. Car starts and runs and I drive back to FLAPS to test system in the car. Master guru technician says machine says I need a new voltage regulator. Of course they don't car it so I drive back home. i get in the DD and hunt down a new voltage regulator and put it in. Car start and drives...so i drive back to FLAPS. On the short drive there the car is running "on and off". i make it there. the 2nd master guru technician hooks up the meter and I manage to barely get the car started and running but it shuts off. He tells me the same thing again, the voltage regulator is bad. I say i changed the voltage regulator and he says no its the one in the alternator. (IMG:style_emoticons/default/blink.gif) So I coast the car back towards home but couldn;t get it started...going to try again later. \ So does this sound like a bad alternator? Car cranks but wont fire. Always thought it would run off the battery if alt is bad. Please help. |
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| McMark |
Aug 22 2016, 09:59 AM
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914 Freak! Group: Retired Admin Posts: 20,180 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
Yup. Curt is right. The alternator's only purpose in life is to charge the battery. It does nothing else. If it's not working, the battery voltage drops and you start getting problems, including no-crank or weak-crank. If it's cranking strong but not firing you have another problem.
Solve the spark issue, then confirm the charging voltage. Do you have conventional points or electronic points? |
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Posts in this topic
7TPorsh What Are the Symptoms of a Bad Alternator Aug 21 2016, 06:56 PM
dangrouche here is the comprehensive thread involving the alt... Aug 21 2016, 08:24 PM
porschetub
here is the comprehensive thread involving the al... Aug 21 2016, 11:21 PM injunmort car will start with 11 or so volts, will run down ... Aug 21 2016, 08:30 PM 7TPorsh Car cranks but does not start now. Aug 21 2016, 08:43 PM colingreene Fuel air and spark, its one of those things. Aug 21 2016, 11:19 PM McMark
Master guru technician says....
2nd master guru t... Aug 22 2016, 05:52 AM The Cabinetmaker Master guru tech at flaps. :rotfl: :rotfl: :jer... Aug 22 2016, 07:20 AM 7TPorsh Yes, guys, master guru is sarcastic term. ....I d... Aug 22 2016, 08:57 AM The Cabinetmaker Yes. You can remove the alternator and still run t... Aug 22 2016, 09:12 AM Toast The symptom is the generator light comes on. ;-)
... Aug 22 2016, 11:17 AM 7TPorsh I can't rely on the dash lights; not sure it... Aug 23 2016, 11:28 AM The Cabinetmaker Have you checked belt tension? Aug 23 2016, 02:11 PM 7TPorsh
Have you checked belt tension?
Thanks Curt, ya ... Aug 23 2016, 03:08 PM |
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