low voltage reading

hernandez

New Member

Jan 15, 2006

44

0

0

Jan 23, 2006

#1

• Jan 23, 2006

• #1

I would start up my mustang and my gauge would read above the the middle mark and the mustang would run great, but after a hour of stop and go and off and on, the meter starts to read low, and at night the lights are dim. but when i rev up the motor they get bright and the needle on the gauge is on the middle mark till i stop again and then it will drop and the lights go dim. i have a 130 g2 alternater, should i step up to the 200 amp g3 alternater.

 

jadedinpa

Founding Member

Aug 2, 2002

1,094

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0

lancaster, pa

Jan 23, 2006

#2

• Jan 23, 2006

• #2

do you have underdrive pulleys?

did you upgrade the wiring when you installed the alt? or was it installed when you got the car?

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

33

129

Jan 23, 2006

#3

• Jan 23, 2006

• #3

hernandez said:

i have a 130 g2 alternater, should i step up to the 200 amp g3 alternater.

Click to expand...

What is the elec connection like to supply 130 amps to the battery? The 2G uses a couple of charge wires, which should be insufficient to flow that amount of current. The 3G has a different power cable attachment.

How much do you have to rev the motor up to get the system out of a state of discharge? 100 RPM, 500 RPM, etc.

Good luck.

 

hernandez

New Member

Jan 15, 2006

44

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0

Jan 24, 2006

#4

• Jan 24, 2006

• #4

i have u/d pullies but only on the crank and the water pump, and i rev it about 500 rpms , i was wanting to get to i higher amp so i can get rid of the low voltage reading on my gauge and to make the headlights staybright and not dim.

 

sgarlic

Founding Member

Apr 21, 2001

3,085

1

56

Jan 24, 2006

#5

• Jan 24, 2006

• #5

I'd just go ahead and swap in the 3g and the appropriate wiring. The 3g's are pretty easy to find these days, between eBay, junkyards, classifieds, etc.

A search for "jrichker" will reveal a quite informative and long post with all the info. you would need.