Welcome to the North American Subaru Impreza Owners Club Friday August 22, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Pre-2002 Factory Turbo Powertrain

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 07-29-2012, 08:20 PM   #1
turbo970
Scooby Newbie
 
Member#: 325644
Join Date: Jul 2012
Location: south west colorado
Vehicle:
1992 legacy

Default do the subaru's need 14.4 volts to run right

well found out that my alt wasn't putting any juice out. i was wondering if the Subaru electrical needs 14.4 volts in order to run right. it will start up with a freshly charged battery but then stall out. and if i let it sit over night i have to let the starter to crank a while before it will fire up
* Registered users of the site do not see these ads.
turbo970 is offline   Reply With Quote
Old 07-29-2012, 08:22 PM   #2
ppayer38
Scooby Specialist
 
Member#: 234407
Join Date: Jan 2010
Chapter/Region: MAIC
Location: Smithfield, VA
Vehicle:
04 Self-tooned
STi

Default

No, between 13.7-14.2 is the operating range and mine runs around 13.8-14 with no issues....
ppayer38 is offline   Reply With Quote
Old 07-29-2012, 08:46 PM   #3
turbo970
Scooby Newbie
 
Member#: 325644
Join Date: Jul 2012
Location: south west colorado
Vehicle:
1992 legacy

Default

then my alt is bad cuz all my system is getting is 12.33 from the battery. no wonder theres weak spark and starting issues
turbo970 is offline   Reply With Quote
Old 07-29-2012, 08:49 PM   #4
ppayer38
Scooby Specialist
 
Member#: 234407
Join Date: Jan 2010
Chapter/Region: MAIC
Location: Smithfield, VA
Vehicle:
04 Self-tooned
STi

Default

Quote:
Originally Posted by turbo970
then my alt is bad cuz all my system is getting is 12.33 from the battery. no wonder theres weak spark and starting issues
Yes... If it charges fine(check voltage while running @ the battery) then the alternator is good and doing its job...

If it doesn't start back up or has a slow start issue it is the battery not holding the charge and load the car puts on it
ppayer38 is offline   Reply With Quote
Old 07-29-2012, 08:55 PM   #5
turbo970
Scooby Newbie
 
Member#: 325644
Join Date: Jul 2012
Location: south west colorado
Vehicle:
1992 legacy

Default

i put my multi meter at the battery after i got it started and it read 12.55 at first and started to drop. when i shut the cat off it was reading 12.33 volts so the alt is bad in my book
turbo970 is offline   Reply With Quote
Old 07-29-2012, 09:11 PM   #6
ppayer38
Scooby Specialist
 
Member#: 234407
Join Date: Jan 2010
Chapter/Region: MAIC
Location: Smithfield, VA
Vehicle:
04 Self-tooned
STi

Default

Quote:
Originally Posted by turbo970
i put my multi meter at the battery after i got it started and it read 12.55 at first and started to drop. when i shut the cat off it was reading 12.33 volts so the alt is bad in my book
You are correct sir! Might wanna search to see if there are any horror stories on Advance/Auto Zone replacments so you don't waste money/time on sonething that'll die quickly...

I only say this because of my old DSM had to have a OE alternator or it would die no matter what

Also you can get a higher output version just for the extra room in amps
ppayer38 is offline   Reply With Quote
Old 07-29-2012, 09:20 PM   #7
turbo970
Scooby Newbie
 
Member#: 325644
Join Date: Jul 2012
Location: south west colorado
Vehicle:
1992 legacy

Default

well my choices are auto zone car quest and napa and i'm on a budget.
turbo970 is offline   Reply With Quote
Old 07-29-2012, 09:42 PM   #8
ppayer38
Scooby Specialist
 
Member#: 234407
Join Date: Jan 2010
Chapter/Region: MAIC
Location: Smithfield, VA
Vehicle:
04 Self-tooned
STi

Default

Quote:
Originally Posted by turbo970
well my choices are auto zone car quest and napa and i'm on a budget.
Well do a little research and I believe you can use a different model alternator for higher loads rating
ppayer38 is offline   Reply With Quote
Old 07-29-2012, 10:01 PM   #9
turbo970
Scooby Newbie
 
Member#: 325644
Join Date: Jul 2012
Location: south west colorado
Vehicle:
1992 legacy

Default

you mean like a new modal of legacy or using one off a forester or impreza
turbo970 is offline   Reply With Quote
Old 07-29-2012, 10:03 PM   #10
ppayer38
Scooby Specialist
 
Member#: 234407
Join Date: Jan 2010
Chapter/Region: MAIC
Location: Smithfield, VA
Vehicle:
04 Self-tooned
STi

Default

Quote:
Originally Posted by turbo970
you mean like a new modal of legacy or using one off a forester or impreza
Like off an STi, forester, or impreza...
ppayer38 is offline   Reply With Quote
Old 07-29-2012, 10:47 PM   #11
THE Rubasu
Scooby Newbie
 
Member#: 325861
Join Date: Jul 2012
Chapter/Region: RMIC
Location: SL,UT
Vehicle:
1990 legacy wagon
color=FE

Default

no your car doesnt have the same connectors as the new ones. your obd 1 dude. i usually try to hit up a junk yard and look for the newest stock subaru alternator from the same model years. the go for around 20 to 30 bucks. auto zone is around 110
THE Rubasu is offline   Reply With Quote
Old 07-30-2012, 12:07 AM   #12
TommyAtomic
Scooby Newbie
 
Member#: 257043
Join Date: Sep 2010
Chapter/Region: VIC
Location: Vancouver BC
Vehicle:
1993 JDM WRX Wagon
Black

Default

This is the PRE-2002 factory turbo forum. What year model car do you have? Depending on year, JDM WRX and STI's have higher output alternators then their same year impreza domestic equivalents. Find a rebuild shop. You can have your alternator tested and if need be rebuilt to the same or better electrical output.

I had mine done 2 years ago. Cost about $150 at the shop I took it to. Before you take it to a shop go through the basics.

Clean your battery terminals and the ends of your battery cables. A battery terminal cleaner is $2.99 . After you clean the battery terminal ends put some dielectric grease on the battery terminals and the battery cable ends.

Check the accessory belt. It should neither be too loose or too tight.

Check your grounds. Everything electrical in your car needs a good ground connection to work. Alternator, starter, battery, Ignition, everything. Corroded grounds dont work. People on EBAY make madmoney selling grounding kits because people are not smart enough to clean their factory grounds. USE: wire brush. wd40. wipe clean. clean cable ends, clean bolt threads use dielectric grease on cable ends afterwards to improve conductivity and prevent future corrosion. If an overachiever sand clean the paint around the area of the bolthole.

Check the terminals on your alternator for corrosion. If found then clean .
TommyAtomic is offline   Reply With Quote
Old 07-30-2012, 11:44 AM   #13
THE Rubasu
Scooby Newbie
 
Member#: 325861
Join Date: Jul 2012
Chapter/Region: RMIC
Location: SL,UT
Vehicle:
1990 legacy wagon
color=FE

Default

he has a first gen turbo leggy
THE Rubasu is offline   Reply With Quote
Old 07-30-2012, 12:23 PM   #14
TommyAtomic
Scooby Newbie
 
Member#: 257043
Join Date: Sep 2010
Chapter/Region: VIC
Location: Vancouver BC
Vehicle:
1993 JDM WRX Wagon
Black

Default

Quote:
Originally Posted by THE Rubasu View Post
he has a first gen turbo leggy
Yeah I'd check the markings on the alternator to see if its a Mitsubishi alternator. Most of the Mitsubishi alternators were high output. If its actually the problem I'd just get it rebuilt by a reputable alternator/starter shop.

You might also look up the model online using the markings off the alternator and verify the wattage. If your going to replace it dont replace it with a lesser output model.
TommyAtomic is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -4. The time now is 05:04 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.