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post #1 of 8 Old 10-03-2002, 11:21 AM Thread Starter
 
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voltmeter 1994 1995

my 95 cobra's voltmeter keeps dipping down to the lowest point before red. i have replaced the battery, alternator, coil and belt. and it is still dipping. the idle does not drop, but still the meter drops. what else could i check to see could be doing it?

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post #2 of 8 Old 10-03-2002, 06:30 PM
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If it is only at idle, then it would be the underdrive pullies. Does it go up when you make the rpms to over 1000 rpms? You could try and put the stock pullies back on and see if that helps. I left off the alt pulley when I installed the underdrive pullies and it only dips when at idle with all the lights on, ac and radio. All I have to do is rev to 1000 rmps and it does back to normal.


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post #3 of 8 Old 10-04-2002, 02:22 PM Thread Starter
 
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yep

yea that is exactly my prob & it does go back to normal when i rev up to 1000. so i should take the pullies off & put stock back on?
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post #4 of 8 Old 10-05-2002, 08:41 AM
 
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If it is at about 10v when sagging into the low zone, then no, leave the pullies alone.

If it goes all the way over to 8v and rests on the left side back stop, then you may want to put the stock alternator pulley back on (only). It seems like most do that; I do and it never dips lower than 10v.
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post #5 of 8 Old 10-06-2002, 11:13 PM Thread Starter
 
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yea

over the weekend i put the stock alternator pulley back on & it helped a lot. now during the day it doesn't really dip at all, but during the night when i have the radio & lights on it still dips, not as much, but still lights dim slightly-WTF? what else could i do? & is this normal? does increasing the timming make any difference?
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post #6 of 8 Old 10-07-2002, 08:47 AM
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On my 94 Cobra with underdrive pullies, minus the alt pulley, it does the same thing. The only way to fix if is to go back to stock pullies. It should be OK, just don't idle a long time at night with lights, ac and radio on, battery might go dead after 15 minutes +. It is something I have learned to live with, I don't have cooling issues so it does not bother me.

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post #7 of 8 Old 10-07-2002, 09:09 AM
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How much of a "dip" is acceptable?

My AODE at idle, in gear w/ lights and high speed fan on gets pretty low at times. It never drops all the way to 8, but rides in the lower quadrant of the guage. Once moving it is back up to 14. Is this killing my alternator / battery, or is this acceptable?

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post #8 of 8 Old 10-07-2002, 09:29 AM
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Pulleys are junk, IMO.

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