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5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

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Old 07-01-2014, 12:19 PM   #1
Js88lx
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Once again another prob..geesh! So now my battery light turned on and my volts dropped and dash lights dimmed. So I had the battery (interstate) tested and charged (passed). What else can this be?
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Old 07-01-2014, 12:26 PM   #2
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alternator
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Old 07-01-2014, 12:34 PM   #3
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Yep. Or voltage regulator (located on the altanator). Those are pretty much all the sexy parts on the charging system.
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Old 07-01-2014, 03:56 PM   #4
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After I had the battery tested and charged I moved to the alternator. I had it tested at auto zone. 1st test failed, 2nd passed, 3rd passed, 4th failed, 5th failed. So I got a new one. Drove to work today and car ran fine..., but I don't think ive driven enough to really know. I hope I don't have a short somewhere.
I was also thinking about adding another ground to my motor. What you guys think?
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Old 07-01-2014, 05:59 PM   #5
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Id wait and see if you cured the problem with the new altanator.
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Old 07-01-2014, 07:20 PM   #6
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Extra ground sounds like a waste of cash. 99.9% it was the alternator. My '93 Escort just pulled that exact trick (working, not, working, not) and its not unusual.
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Old 07-02-2014, 04:54 PM   #7
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Ok. Well 2 days now and no problems. Knock on wood. Just that darn bbk header still not sealing to head.. head nod.
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Old 07-02-2014, 06:13 PM   #8
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I had problems with my bbk headers not wanting to seal to my heads as well, I found that using the thicker aluminum gaskets worked.
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Old 07-03-2014, 12:19 AM   #9
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Is there an easy way of finging out whether its leaking from the head to header or header to xpipe? Today i put the stock header back on and tick was gone... sounded soo dam# good! I miss not having an exhaust leak!
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Old 07-03-2014, 01:36 AM   #10
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You should be able to look at the header that you took off, on the head side of the flange where it was leaking will be a carbon track. If they are on the car I usually just listen close to where the noise is coming from, and stick my fingers around there to see if I can feel any leaks. If you have some one cover the tail pipe it will usually cause the leak to become very pronounced.
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Old 07-03-2014, 01:36 AM
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