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.

18 volts at idle!!!

Thread Tools
 
Search this Thread
 
Old 11-14-2008, 12:36 PM
  #1  
charlie112701
Thread Starter
 
charlie112701's Avatar
 
Join Date: Sep 2008
Location: GA
Posts: 30
Default 18 volts at idle!!!

K i got a 1990 gt w/ 306, e303 cam, typhoon upper n lower,just a mild build..the battery is relocated to trunk...the other day was driving up the road and some idiot pulled out right in front of me.. had to stomp brakes, went side ways, got it back...then my car started reading over 18 volts for battery..got out checked every thing,nothing out of odinary..so drove home and still reading over 18 thenwhen i cut it off the battery was fizzing out water or acid or whatever...put diff battery in same thing....any ideas?
charlie112701 is offline  
Old 11-14-2008, 12:39 PM
  #2  
DJ19895.0
2nd Gear Member
 
DJ19895.0's Avatar
 
Join Date: Nov 2005
Location: Michigan
Posts: 263
Default

It is the voltage regulator in the alternator. I think you may have to get a whole new alternator. Don't run it like that, it could burn up anything electrical in the car.
DJ19895.0 is offline  
Old 11-14-2008, 12:49 PM
  #3  
charlie112701
Thread Starter
 
charlie112701's Avatar
 
Join Date: Sep 2008
Location: GA
Posts: 30
Default

alright also i forgot when i unplugged the pos on battery car would run but not rev up or anything...that sound right for the regulator too?
charlie112701 is offline  
Old 11-14-2008, 06:09 PM
  #4  
mjr46
D.R. THE PATHETIC DORK
 
mjr46's Avatar
 
Join Date: Jun 2007
Location: West Virginia
Posts: 30,863
Default

just go get a new alt........if you continue to drive it like such you will boil your battery and cook it!!
mjr46 is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
4cylinderplus2
V6 (1994-2004) Mustangs
10
10-09-2020 07:45 PM
TCStangerv6
Street/Strip
12
10-11-2015 05:57 PM
svfetter
5.0L (1979-1995) Mustang
9
10-05-2015 11:39 AM
Dathan
V6 (1994-2004) Mustangs
4
10-05-2015 05:52 AM
MacSerio
5.0L (1979-1995) Mustang
3
09-27-2015 01:05 PM



Quick Reply: 18 volts at idle!!!



All times are GMT -5. The time now is 01:01 AM.