battery voltage
03-16-06, 09:35 PM
#1
Senior Member
Thread Starter
Join Date: Jul 2004
Location: Delhi, CA
Posts: 444
Likes: 0
Received 0 Likes
on
0 Posts
battery voltage
When running the 7 for an hour to charge it up I turn it off then turn it on to see the voltage and it reads 11.3.
When starting it will crank slowly at first then pick up speed over 5-10 seconds and finally start up.
The Optima blue top is about one year old and even with a long slow charge the voltage drops drastically as soon as I remove the charger.
I think the optima is defective.
What should I do to prove or disprove this theory?
The car is a 1979 SA.
Dennis
When starting it will crank slowly at first then pick up speed over 5-10 seconds and finally start up.
The Optima blue top is about one year old and even with a long slow charge the voltage drops drastically as soon as I remove the charger.
I think the optima is defective.
What should I do to prove or disprove this theory?
The car is a 1979 SA.
Dennis
03-17-06, 12:48 AM
#4
Are you using an electric fan? Mine required a second gen alternator when i installed my Black Magic electric fan. I also replaced my ground wire battery terminal; using custom 4 gauge welding wire.
03-17-06, 07:37 AM
#6
Junior Member
Join Date: Oct 2005
Location: Burlington, ON, Canada
Posts: 44
Likes: 0
Received 0 Likes
on
0 Posts
I was having the exact same problem with one of my cars less than a month ago...turned out to be a bad battery. Have a shop load test it, shouldn't cost much, even less if you know someone.
good luck
good luck
03-17-06, 10:06 AM
#7
Senior Member
Thread Starter
Join Date: Jul 2004
Location: Delhi, CA
Posts: 444
Likes: 0
Received 0 Likes
on
0 Posts
Thanks
Thank you for your replys.
The problem is the same whether I slow charge for 10-12 hours at 2 amps or at medium rate of 12 amps or quick charge at 25 amps.
The charger has an automatic desulphate mode and full charge switch over to a maintenance setting.
The voltage still drops rapidly when the charger is removed.
It acts like a bad cell, but I do not know if that is possible with this type of battery.
The alternator puts out around 14 volts at fast idle.
I will:
1 Remove battery
2 Swap in a standard good one to see how it acts in the car
3 Take the Optima to an auto parts store for load testing.
4 Try to find the dimensions and position to cut out the panel for the storage bins so I can do the battery relocate mod.
5 Try a yellow top next time
The problem is the same whether I slow charge for 10-12 hours at 2 amps or at medium rate of 12 amps or quick charge at 25 amps.
The charger has an automatic desulphate mode and full charge switch over to a maintenance setting.
The voltage still drops rapidly when the charger is removed.
It acts like a bad cell, but I do not know if that is possible with this type of battery.
The alternator puts out around 14 volts at fast idle.
I will:
1 Remove battery
2 Swap in a standard good one to see how it acts in the car
3 Take the Optima to an auto parts store for load testing.
4 Try to find the dimensions and position to cut out the panel for the storage bins so I can do the battery relocate mod.
5 Try a yellow top next time
Last edited by wecycle; 03-17-06 at 10:07 AM. Reason: spelling
Trending Topics
03-26-06, 07:10 AM
#10
Hunting Skylines
Join Date: Apr 2001
Location: Brisbane, Queensland, Australia.
Posts: 3,431
Likes: 0
Received 2 Likes
on
2 Posts
Originally Posted by Paradox
sounds like you have a bad ground somewhere.
Thread
Thread Starter
Forum
Replies
Last Post
FC3S Timmy
2nd Generation Specific (1986-1992)
16
10-03-15 01:08 AM
FC3S Timmy
2nd Generation Specific (1986-1992)
8
10-02-15 08:08 AM