General Miata Chat A place to talk about anything Miata

Stupid battery question

Thread Tools
 
Search this Thread
 
Old 08-11-2009 | 07:44 PM
  #1  
akaryrye's Avatar
Thread Starter
Elite Member
iTrader: (5)
 
Joined: Jul 2006
Posts: 2,557
Total Cats: 5
From: Central California
Default Stupid battery question

so Ive been having problems with the car not starting recently and I have been testing stuff to figure out what is going on. With the battery fully charged (13.5v with car turned off) and the ignition disabled, the car began to struggle cranking after about 10 seconds. When the car is running, I get 13.5v. I am thinking its a crap battery.
Old 08-11-2009 | 08:16 PM
  #2  
Alta_Racer's Avatar
Junior Member
iTrader: (4)
 
Joined: Oct 2006
Posts: 228
Total Cats: 7
From: Alberta Canada
Default

whats the voltage cranking would tell more
Old 08-11-2009 | 10:12 PM
  #3  
akaryrye's Avatar
Thread Starter
Elite Member
iTrader: (5)
 
Joined: Jul 2006
Posts: 2,557
Total Cats: 5
From: Central California
Default

well I just had the battery tested at autozone, and it said it was good. Looked like the voltage under load never went below 9v ... must be a short somewhere or an intermittent alternator issue.
Old 08-11-2009 | 10:28 PM
  #4  
Joe Perez's Avatar
Boost Pope
iTrader: (8)
 
Joined: Sep 2005
Posts: 33,556
Total Cats: 6,933
From: Chicago. (The less-murder part.)
Default

Originally Posted by akaryrye
the car began to struggle cranking after about 10 seconds.
Why on earth are you cranking for 10 seconds?
Old 08-11-2009 | 10:42 PM
  #5  
akaryrye's Avatar
Thread Starter
Elite Member
iTrader: (5)
 
Joined: Jul 2006
Posts: 2,557
Total Cats: 5
From: Central California
Default

I wanted to see how it would do under load for an extended period of time, I read something about doing that on a website I came across and figured it couldn't hurt to try it out.
Old 08-12-2009 | 12:52 AM
  #6  
MartinezA92's Avatar
Elite Member
iTrader: (4)
 
Joined: Aug 2009
Posts: 1,784
Total Cats: 42
From: Redwood City, CA
Default

I would think if you were cranking an engine for 10 seconds straight that it's somewhat normal that it would struggle...
Old 08-12-2009 | 01:02 AM
  #7  
magnamx-5's Avatar
:(
iTrader: (7)
 
Joined: Jul 2006
Posts: 8,255
Total Cats: 4
From: nowhere
Default

its your starter selonoid going bad dude. trust me. replace that **** and you can stop push starting your car.
Old 08-12-2009 | 11:36 AM
  #8  
Alta_Racer's Avatar
Junior Member
iTrader: (4)
 
Joined: Oct 2006
Posts: 228
Total Cats: 7
From: Alberta Canada
Default

9V loaded is fubar
Old 08-12-2009 | 01:02 PM
  #9  
akaryrye's Avatar
Thread Starter
Elite Member
iTrader: (5)
 
Joined: Jul 2006
Posts: 2,557
Total Cats: 5
From: Central California
Default

Originally Posted by magnamx-5
its your starter selonoid going bad dude. trust me. replace that **** and you can stop push starting your car.
Ill have to give that a shot. I have been having a problem for a long time now where I have to turn the key 5 - 10 times before the starter catches ... otherwise it just clicks with no start.

Originally Posted by Alta_Racer
9V loaded is fubar
Ya, I guess but autozone said the battery was good and I cant imagine that a battery that dies as quick as mine has been would pass. I suppose it could be on the fritz and barely passed the test.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
bigmackloud
Miata parts for sale/trade
19
01-08-2021 12:24 PM
Rick02R
WTB
3
01-03-2016 08:18 PM
btabor
ECUs and Tuning
10
09-28-2015 06:33 PM
ihiryu
General Miata Chat
9
09-28-2015 11:22 AM




All times are GMT -4. The time now is 12:20 PM.