Voltage Problems

[loggystone 10+ year member]

When i first start my car in the morning my voltage rests at a nice 14.0 and slowly dwindles down to about a 13.7v-13.6v. As i drive a little more throughout the day i get down to about 13.4v-13.3v. With my substage off and just running my components off of a few hundred watts i dip down to like 12.9 sometimes. Its kind of starting to freak me out that a few hundred watts would give me a voltage drop like that. With my substage on, i dip down to like 11.2v on the hard hitters. I know ive got a little baby batt in the back and a stock alt, but just my components making it go down that much, i mean come on man, wtf. Can anyone shine some light on me?

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[jkeplinger89 10+ year member]

Did you upgrade your engine grounds yet?

my 93 old's did the same thing. Ran a 2g from the battery to the block and another 2g from the battery to the unibody

 

[Xprime4 10+ year member]

Alty charge better when cold. It's kinda normal that the car on "resting" rate goes down as it heat.

Beside that, you're running a zx2500. I think the drops are fine, for your current backup

 

[jkeplinger89 10+ year member]

Did you upgrade your engine grounds yet?
my 93 old's did the same thing. Ran a 2g from the battery to the block and another 2g from the battery to the unibody

Disregard that I just read your sig.. I would get the alternator and batteries tested

or check to make sure the grounds are still tight..

 

[loggystone 10+ year member]

I have my rear fill powered by my HU, and when i fade all to the front(comps) i get .2 more voltage. I cant figure out why this would happen like this.