Stevens91gt

So i've been gone for a while..like a long while
and my car is dying a lot
I come to a stop and have to worry about it dying everytime
I upgraded to a 130amp alt. and still have the same problem
when i come to an idle my car's battery lowers..why?

(i have underdrive pulleys)
i thought that may be the problem
but i thought the 130amp would fix it
am i wrong?
maybe new battery?

thedude

Get the car started. With it running, remove the negative battery connection. If it dies, the sytem is not charging. This could be either the alternator or the voltage regulator.

Another way to check is to hook the voltmeter across the battery poles. When you rev the engine the volts should rise to about 14.5 and then fall again when it comes back down to idle. If they rise, that means the system is charging.

Stevens91gt

well it charges because when i rev up the engine the battery charge goes up
when i first installed the new alternator (4 months ago) at idle the charge was 14.2-4
with the voltmeter and would rise a little when revved
assuming the alternator is good (which it better be) what else could it be?

mjr46

take the underdrive pullies off.....the slow down the speed of the alt whose charging rate is dependant upon engine rpm.......upgrading the alt won't solve prob...removing pullies will

thedude

hmmm. I guess it could be the battery. You could just take it toautozone or something and they could test for you forfree.

Stevens91gt

see i thought it was the pulleys
im just going to take them off
and to compensate for the hp
i'll buy an electric fan

mjr46

Underdrive pullies IMO...really don't free up all that much horsepower.. the cause more probs than solve.....I just run an elec water pump and stock pullies and no charging issues ever

Stevens91gt

well my pullies are shiny[:-]
haha and i want an electric fan too
so that's my excuse i mean reason

LTnone

I have a hard time believing that the u/d's are giving him that much trouble, especially some time after the install. I've never had a problem with mine through a 3g. An electric fan would be nice

Stevens91gt

well the electric fan is coming regardless
even if i have to hold the idle up a little at a stop haha
but that's what i thought, that it wouldn't give that much trouble