Alternator going bad - Ranger-Forums - The Ultimate Ford Ranger Resource


General Ford Ranger Discussion General discussion of the Ford Ranger that does not fit in any other sub-forum.

Reply
 
LinkBack Thread Tools Search this Thread
  #1  
Old 12-06-2005
ToughFord's Avatar
Member
Thread Starter
 
Join Date: Jun 2004
Location: Chicago, IL
Posts: 254
Alternator going bad

My damn alternator I noticed tonight when I am at idle the needle on the battery guage is low and when I am cruising I can watch the needle climb also my heater kicks in higher when I am crusing. Theres only 67000 miles on it oh well...

With my new addition in 7 KC lights with a total of 850 watts I am getting parts ready for a dual battery setup. Any recomendations on alternator size and a reliable place to get one at?
Reply With Quote
  #2  
Old 12-06-2005
Member
 
Join Date: May 2004
Location: Fuquay Varina, NC
Posts: 3,048
i was going to list some 200 amp alternators on the site soon, if you need one, ill list it sooner!
Reply With Quote
  #3  
Old 12-06-2005
OffRoad 4x4's Avatar
Member
 
Join Date: Feb 2005
Location: Escondido, CA
Posts: 301
Eric,

When you upgrade your alternator.... using a 130-200A alternator will require you to upgrade the cable that goes from the alternator to the battery. I would suggest using 4 ga fine stranded wire for the increased load.
You also might consider upgrading your battery to one with larger capacity. This will assist your alternator by increasing the storage for the amps you need to run all those lights.

OR 4x4
Reply With Quote
  #4  
Old 12-06-2005
n3elz's Avatar
RF Veteran
 
Join Date: Jun 2004
Location: Kennett Square, PA
Posts: 10,620
One other thing to consider.

Many, if not most, high output alternators can actually produce lower volts at idle! Athough your overall capacity can go up, your idle charging may not -- though it will certainly be higher than it is with a bum alternator.

You can get around this to some extent, if you don't "race" around at high RPM's a lot, by using a smaller alternator pulley.
Reply With Quote
  #5  
Old 12-06-2005
FireRanger's Avatar  
Join Date: May 2004
Location: CT
Posts: 0
A few things here.

Pretend you have no batteries. They don't exist. They're invisible. They are not connected. Ignore them for a few minutes. Your alternator must be able to supply the load put upon it by itself. Including your stock high beams and fog lights, you have over 80 AMPS of lighting on that truck and your alternator is only 90 amps. You've left yourself with less than 10 amps to run the rest of the truck which is clearly not enough. I wouldn't get anything less than 130 amps when you upgrade that alternator, preferably more. And make sure you see what the alternator will produce at idle. Like Mr John recomendded, the smaller pully might be a good idea as well.

Now unhide the battery. The primary function of a car battery is to the start the vehicle. The secondary purpose is to power accessories when the engine is not running therefore not turning the alternator. The batteries should never be relied upon to supplement an under rated alternator. The only thing that does is prevent the battery from recharging and sucks it down instead. Eventually, you will suck it down to the point where your ignition can't function and the engine will stall. Guess what, it isn't going to start again either. Dual batteries are great for having a lot of engine-off power reserves. But you can't use it to have a big buffer for a crappy alternator.
Reply With Quote
  #6  
Old 12-06-2005
ToughFord's Avatar
Member
Thread Starter
 
Join Date: Jun 2004
Location: Chicago, IL
Posts: 254
hey bob yeah if you got a list of aftermarket alternators I would like to see them... I think I am going to be getting it soon.... and I am aware of the idle output but thanks guys for all your suggestions I will keep them in mind
Reply With Quote
  #7  
Old 12-06-2005
Blhde's Avatar
Member
 
Join Date: Oct 2005
Location: Northern IL
Posts: 2,804
Quote:
Originally Posted by SoundPer4mance
i was going to list some 200 amp alternators on the site soon, if you need one, ill list it sooner!
can you be competitive with these prices?

93-01 Ranger All engine sizes 200 AMP 3G $225.00

http://www.mralternator.com/alternators/ford.html


granted that does not include shipping
Reply With Quote
  #8  
Old 12-06-2005
Member
 
Join Date: May 2004
Location: Fuquay Varina, NC
Posts: 3,048
i will try to add them to the site tonight, we will be offering 4 gauge upgrade primary wires as well, they are in development, but if you order one, it will become a priority
Reply With Quote
  #9  
Old 12-06-2005
Member
 
Join Date: May 2004
Location: Fuquay Varina, NC
Posts: 3,048
is the one from mr. alternator all new or remanfactured with upgraded parts? their site does not do a very good job of describing them
Reply With Quote
  #10  
Old 12-06-2005
n3elz's Avatar
RF Veteran
 
Join Date: Jun 2004
Location: Kennett Square, PA
Posts: 10,620
You da' man, Bob. I like how you respond to demand on your site.
Reply With Quote
  #11  
Old 12-06-2005
optikal illushun's Avatar
Member
 
Join Date: Oct 2004
Location: Coal Region, MTC to be exact...heart of the coal region.
Posts: 2,232
Quote:
Originally Posted by FireRanger
A few things here.

Pretend you have no batteries. They don't exist. They're invisible. They are not connected. Ignore them for a few minutes. Your alternator must be able to supply the load put upon it by itself. Including your stock high beams and fog lights, you have over 80 AMPS of lighting on that truck and your alternator is only 90 amps. You've left yourself with less than 10 amps to run the rest of the truck which is clearly not enough. I wouldn't get anything less than 130 amps when you upgrade that alternator, preferably more. And make sure you see what the alternator will produce at idle. Like Mr John recomendded, the smaller pully might be a good idea as well.

Now unhide the battery. The primary function of a car battery is to the start the vehicle. The secondary purpose is to power accessories when the engine is not running therefore not turning the alternator. The batteries should never be relied upon to supplement an under rated alternator. The only thing that does is prevent the battery from recharging and sucks it down instead. Eventually, you will suck it down to the point where your ignition can't function and the engine will stall. Guess what, it isn't going to start again either. Dual batteries are great for having a lot of engine-off power reserves. But you can't use it to have a big buffer for a crappy alternator.
STICKY THIS POST. this man is 100% correct...

id opt for 0/0 wire, but thats me. the alt for 93-01 rangers is a 3G, the 2002+ is a 4G. if ur wanting to upgrade ur alt on the cheap and have a 93-01 u ca head to the junkyard and get a 130A alt from a taurus/sable.

there are two style 3Gs...old serp and new serp belt style. the one in the link is a new style serp. also there is a large case and small case.
Reply With Quote
  #12  
Old 12-06-2005
KARPE's Avatar
Member
 
Join Date: Apr 2005
Location: Valrico, Fl 33594
Posts: 4,748
between my alt. and my battery there arent any split off's are there? I'm at work and cant check. but I dont think there would be anything between the two right?
Reply With Quote
  #13  
Old 12-06-2005
optikal illushun's Avatar
Member
 
Join Date: Oct 2004
Location: Coal Region, MTC to be exact...heart of the coal region.
Posts: 2,232
how u mean?
Reply With Quote
  #14  
Old 12-06-2005
Member
 
Join Date: May 2004
Location: Fuquay Varina, NC
Posts: 3,048
well im trying to give the best prices i can to people. to be honest, there arent a whole lot of products int he store yet because i spend all day drilling suppliers to find the best prices. the difficulty i have is i dont have the money to do buy ins to get really good deals, so im just pulling strings left and right. I may be able to match mr alternator with some nice completely new alternators, but i need to know if theirs are all new or reman with new parts to upgrade them
Reply With Quote
  #15  
Old 12-06-2005
KARPE's Avatar
Member
 
Join Date: Apr 2005
Location: Valrico, Fl 33594
Posts: 4,748
Kiel, if that was directed at me I mean the only thing that touches the wire between the alt and the battery is ..the alt and battery. that wire doesnt fork anywhere right. asking for upgrading size purpose.
Reply With Quote
  #16  
Old 12-06-2005
Member
 
Join Date: May 2004
Location: Fuquay Varina, NC
Posts: 3,048
i believe the wire goes from the alt to the main fuse panel under the hood, and from there goes back to the battery, i havent looked in a while though so im not positive
Reply With Quote
  #17  
Old 12-06-2005
optikal illushun's Avatar
Member
 
Join Date: Oct 2004
Location: Coal Region, MTC to be exact...heart of the coal region.
Posts: 2,232
u should upgrade the all the wiring. battery to the alt to the starter solenoid (if equiped) to the starter and the fuse panel if u feel nesseccary. also all grounds.
Reply With Quote
  #18  
Old 12-07-2005
ToughFord's Avatar
Member
Thread Starter
 
Join Date: Jun 2004
Location: Chicago, IL
Posts: 254
okay Bob are you the one that will be selling 200 amp alternators? If so they all new or some reman parts? And you got a price?
Reply With Quote
  #19  
Old 12-07-2005
Blhde's Avatar
Member
 
Join Date: Oct 2005
Location: Northern IL
Posts: 2,804
Bob

truckperformance sells a 200 amp alt for 300+

http://truckperformance.com/products...ions/sf6_4.0l/


If you could sell a 200 amp alt for 275 shipped or so id say that would be a good price.
Reply With Quote
  #20  
Old 12-07-2005
Member
 
Join Date: May 2004
Location: Fuquay Varina, NC
Posts: 3,048
The alternators we sell are all 100% new with the heaviest duty parts available. Im not sure on price but im shooting for the $259 shipped range for a 200 amp, i would say give or take about $15 from there, we will also be offering the upgraded primary wire, but I have to do a little thinking on it, its a little tricky in these trucks. they will be 4 gauge thin stranded cable, with an inline fuse to match the alternator rating. The fuse holders and connectors are pricey for 4 gauge, so we will be looking at around $40-50 for the upgraded wire.

If some of you are serious about wanting one soon, i can add it to the site tonight. anyone?
Reply With Quote
  #21  
Old 12-07-2005
ToughFord's Avatar
Member
Thread Starter
 
Join Date: Jun 2004
Location: Chicago, IL
Posts: 254
well I need to get an alternator soon before this one craps out and i will be getting the rest of my lights tomorrow so I would say I will be looking to get it within the next week or two
Reply With Quote
  #22  
Old 12-07-2005
Blhde's Avatar
Member
 
Join Date: Oct 2005
Location: Northern IL
Posts: 2,804
is the fuse really needed?
Reply With Quote
  #23  
Old 12-07-2005
Member
 
Join Date: May 2004
Location: Fuquay Varina, NC
Posts: 3,048
the fuse may not be necessary, i could offer the wire without the fuse

the alternators are loaded into the store now, under electronics
Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
How long can my alternator keep going? stockranger General Ford Ranger Discussion 1 08-04-2015 10:22 PM
what kind of noise does an alternator make when its going out? Tys 4x4 FTW General Ford Ranger Discussion 16 04-24-2009 12:23 AM
The_Dealer: Bad Deal Bad Member Bad Sell! LayingFrame89 Ranger Products, Company, & Member Reviews 34 12-01-2007 07:59 AM
Stock Drivesaft with RCD = BAD BAD BAD PICS INSIDE ranger General Ford Ranger Discussion 32 07-31-2007 12:50 PM
ALL offroaders are BAD BAD BAD! FMD General Ford Ranger Discussion 13 04-25-2006 08:21 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -6. The time now is 12:23 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.