• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

ALTEWRNATOR?

  • Thread starter Thread starter 1991GreeNLX
  • Start date Start date Oct 25, 2004
Prev
  • 1
  • 2
First Prev 2 of 2
R

ratrapp

New Member
Apr 24, 2004
510
0
0
buena vista,va
Oct 26, 2004
#21
  • Oct 26, 2004
  • #21
5spd,the only time my lights get dim is at night with lights on,heater and e-fan running at the same time at idle.i don't have a/c or a killer stereo so that may help me a little plus i don't have fog lights.
 

89roadster

Founding Member
Apr 19, 1999
1,124
0
0
Kent Island, MD
Oct 26, 2004
#22
  • Oct 26, 2004
  • #22
5spd GT said:
That is exactly like mine...but I have the March underdrives and my alternator can't keep up with all that...what could be the cause?
Click to expand...

I haven't installed the pulleys yet...maybe that's the problem????

It will be months before I install the pulleys, but maybe I'll remember to update the thread when I do.

What battery are you running? Maybe the fact that I'm running the Optima red top has something to do with it? I also have a simple Sony CD player with no amps...I'm sure that can have a lot to do with it.
 

5spd GT

"the 5.0 owns all"
Founding Member
Aug 7, 2002
9,516
6
99
Arkansas
Oct 26, 2004
#23
  • Oct 26, 2004
  • #23
89roadster said:
I haven't installed the pulleys yet...maybe that's the problem????

It will be months before I install the pulleys, but maybe I'll remember to update the thread when I do.

What battery are you running? Maybe the fact that I'm running the Optima red top has something to do with it? I also have a simple Sony CD player with no amps...I'm sure that can have a lot to do with it.
Click to expand...

I'm running a battery from NAPA..just a plain replacement...it was slightly smaller than the one in there...what size battery will fit in the "box"...

I have a Pioneer Cd player with 4 6x8's...but I do have a hookup (previous owner) for subwoofers and amp in the back? Could that do it even though nothing is hooked up...I have a speaker fuse underneath my hood for it...

I notice when I turn on my electric fan my guage shows it drops 2 bars...and my lights go even dimmer and when I rev it it brightens back up...and even at idle with just the radio going when I rev it up it brightens up a little also...
 

89roadster

Founding Member
Apr 19, 1999
1,124
0
0
Kent Island, MD
Oct 26, 2004
#24
  • Oct 26, 2004
  • #24
5spd GT said:
I'm running a battery from NAPA..just a plain replacement...it was slightly smaller than the one in there...what size battery will fit in the "box"...

I have a Pioneer Cd player with 4 6x8's...but I do have a hookup (previous owner) for subwoofers and amp in the back? Could that do it even though nothing is hooked up...I have a speaker fuse underneath my hood for it...

I notice when I turn on my electric fan my guage shows it drops 2 bars...and my lights go even dimmer and when I rev it it brightens back up...and even at idle with just the radio going when I rev it up it brightens up a little also...
Click to expand...

My electric fan doesn't even drop the needle a full bar by itself...what fan are you running? I don't lose two full bars for hardly anything!?!?!?! (Seriously, I'd have to have the AC on high, high beams, windshield wipers, flashers, cd player, and putting windows up and down to get it to drop 2+ bars) But like I said before, I'm not running the UD pulleys yet!
 

5spd GT

"the 5.0 owns all"
Founding Member
Aug 7, 2002
9,516
6
99
Arkansas
Oct 26, 2004
#25
  • Oct 26, 2004
  • #25
89roadster said:
My electric fan doesn't even drop the needle a full bar by itself...what fan are you running? I don't lose two full bars for hardly anything!?!?!?! (Seriously, I'd have to have the AC on high, high beams, windshield wipers, flashers, cd player, and putting windows up and down to get it to drop 2+ bars) But like I said before, I'm not running the UD pulleys yet!
Click to expand...

I have a Black Magic Electric Fan like you...all the wires are hooked up to the fan...not one is left out...

It must be the UD pullies...I'm hoping maybe that overdrive pulley that 89sleeper has will fix my problems...

Does anybody know if that speaker fuse and hookup (even though the subwoofer or amp aren't hooked up) would cause a constat draw on the charging system...?
 

04sleeper

Founding Member
Jun 22, 2002
2,674
14
89
Dallas, TX
Oct 26, 2004
#26
  • Oct 26, 2004
  • #26
5spd GT said:
It must be the UD pullies...I'm hoping maybe that overdrive pulley that 89sleeper has will fix my problems...

Does anybody know if that speaker fuse and hookup (even though the subwoofer or amp aren't hooked up) would cause a constat draw on the charging system...?
Click to expand...
The pulley swapped on just fine and my car charges perfect. Mine used to do the same at idle with the stock alternator pulley. Now it charges like a champ. Even with the underdrive crank pulley.
 

5spd GT

"the 5.0 owns all"
Founding Member
Aug 7, 2002
9,516
6
99
Arkansas
Oct 26, 2004
#27
  • Oct 26, 2004
  • #27
89sleeper said:
The pulley swapped on just fine and my car charges perfect. Mine used to do the same at idle with the stock alternator pulley. Now it charges like a champ. Even with the underdrive crank pulley.
Click to expand...

So I just need to take it off with an impact and then bolt that one from Summit back on to 60ft lbs? or less or more?
 

04sleeper

Founding Member
Jun 22, 2002
2,674
14
89
Dallas, TX
Oct 26, 2004
#28
  • Oct 26, 2004
  • #28
5spd GT said:
So I just need to take it off with an impact and then bolt that one from Summit back on to 60ft lbs? or less or more?
Click to expand...
I took mine off with an impact and then just put it back on with an impact. I just held the pulley with a rag while I did it. I have done it this way several times before and never had a problem. I did not try to use a torque wrench.
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
31,179
33
129
Oct 27, 2004
#29
  • Oct 27, 2004
  • #29
5spd GT said:
Does anybody know if that speaker fuse and hookup (even though the subwoofer or amp aren't hooked up) would cause a constat draw on the charging system...?
Click to expand...
if you have an amp-wiring kit with nothing on the amp end, as long as there is no short, it should not draw. i might ask: if you dont have anything hooked up, why on earth do you have the fuse installed? i would pull the fuse.

good luck.
 

5spd GT

"the 5.0 owns all"
Founding Member
Aug 7, 2002
9,516
6
99
Arkansas
Oct 27, 2004
#30
  • Oct 27, 2004
  • #30
HISSIN50 said:
if you have an amp-wiring kit with nothing on the amp end, as long as there is no short, it should not draw. i might ask: if you dont have anything hooked up, why on earth do you have the fuse installed? i would pull the fuse.

good luck.
Click to expand...

Two reason why I haven't removed it:

1. I'm "wiring retarted"

2. The previous owner put it in and has it wired underneath the carpet to the back for a "clean" look...and it is under the dash...and he has the fuse (I beleive) from the starter solenoid and there is a bunch of other wires in its way...I guess I could work on it one day? Save some weight atleast...maybe a few ounces
 

89roadster

Founding Member
Apr 19, 1999
1,124
0
0
Kent Island, MD
Oct 27, 2004
#31
  • Oct 27, 2004
  • #31
5spd GT said:
So I just need to take it off with an impact and then bolt that one from Summit back on to 60ft lbs? or less or more?
Click to expand...

PA Performance said:
We simply cannot warranty things that are not our fault. With all that said, change the pulley and use common sense. With an impact gun and about 80 foot lbs of torque you will be just fine. When someone orders pulleys it is standard practice to tell them about this exception, perhaps we missed it when speaking to you.
Sorry for the confusion.
Click to expand...

This was in response to my "WHY THE F&*% DO YOU SELL UNDERDRIVE PULLEYS AND IN THE INSTALLATION MANUAL FOR THE ALTERNATOR SAY THAT THE WARRANTY IS VOIDED IF I INSTALL THE UNDERDRIVE PULLEYS????"

Basically you have to ask them for permission before you do it so you don't void your warranty....I would really ask them for permission first!
 

5spd GT

"the 5.0 owns all"
Founding Member
Aug 7, 2002
9,516
6
99
Arkansas
Oct 27, 2004
#32
  • Oct 27, 2004
  • #32
89roadster said:
This was in response to my "WHY THE F&*% DO YOU SELL UNDERDRIVE PULLEYS AND IN THE INSTALLATION MANUAL FOR THE ALTERNATOR SAY THAT THE WARRANTY IS VOIDED IF I INSTALL THE UNDERDRIVE PULLEYS????"

Basically you have to ask them for permission before you do it so you don't void your warranty....I would really ask them for permission first!
Click to expand...

Thanks for asking them...

We were referring to installing an overdrive pulley...it would void the warranty because it puts more strain on the 3g alternator that it wasn't designed for...

I'll be ordering one pretty soon...whenever I get some money

So 80lbs it is...
 
Prev
  • 1
  • 2
First Prev 2 of 2
You must log in or register to reply here.

Similar threads

S
Electrical Alternator not charging after terminator 2 install.
  • Sfab79
  • Aug 24, 2025
  • Fox 5.0 Mustang Tech
  • 2
Replies
30
Views
632
Fox 5.0 Mustang Tech Saturday at 6:32 AM
AeroCoupe
W
Electrical 91 GT Alternator Replacement Question
  • willrh111
  • Oct 22, 2025
  • Fox 5.0 Mustang Tech
Replies
6
Views
310
Fox 5.0 Mustang Tech Oct 23, 2025
nickyb
Electrical Ron Francis Headlight / Alternator Harness
  • dan50
  • Apr 30, 2026
  • Fox 5.0 Mustang Tech
Replies
0
Views
179
Fox 5.0 Mustang Tech Apr 30, 2026
dan50
A
Resolved Electrical Help Please
  • Alabama
  • Jan 22, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
2
Views
249
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jan 22, 2026
AeroCoupe
M
Alternator
  • Mustang_monster626
  • Jun 5, 2025
  • 1965 - 1973 Classic Mustangs -General/Talk-
Replies
5
Views
243
1965 - 1973 Classic Mustangs -General/Talk- Jun 16, 2025
Noobz347
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?