help me fix my voltage drop

[skittlesRgood 10+ year member]

good 1/0ga is good for like 3400 watts or some shit usually....what are u running ur subs at? 2ohms?

yes 2ohm.

 

[Jeremy M 10+ year member]

what fuses are u running? i seen u say something about 100a's.

u should probably put like a 200/250a on ur sub amp and a 100a on that pdx IMO

 

[skittlesRgood 10+ year member]

i think i have a 60 on the pdx. thats enough.

the sub has 2 power inputs so i have 2 4awg wires running with 100amps. gives me a 200amp fuse. its an AGU disrto block so i cant go any higher.

 

[skittlesRgood 10+ year member]

batcap reads 12.5

yellowtop reads 12.4

stock battery reads 12.23

both distros read .001 ohms from the other end of both wires (in and out)

 

[audiobahnuser18 5,000+ posts]

I noticed you said your running stock battery for the front what are you running for your front battery?

 

[skittlesRgood 10+ year member]

huh? you just said you know im running stock up front but what am i running up front? uhh stock up front. acid battery.

from the front battery to the amp the - wire read .1ohm. so that shouldnt be doing anything.

im thinking that its the car. i think the regulator for the alt is just slow. ill look into the MLA to test that.

 

[king ranch 5,000+ posts]

wats your voltage at full tilt and idle, at the amps and the back battery

 

[skittlesRgood 10+ year member]

those are my idle numbers. droping to 8.??volts.

 

[king ranch 5,000+ posts]

8 volts at what the battery or amp either way thats impossible it would be fried

maybe your voltage reader is wrong or dmm or w/e u are using to read it

 

[skittlesRgood 10+ year member]

i have a very nice fluke dmm. its accurate. read at amp.

 

[RidnClean 5,000+ posts]

maybe the alt is a problem?

 

[skittlesRgood 10+ year member]

its a new mechman... they tested it. how can i get it tested?

 

[RidnClean 5,000+ posts]

a place that test alts, dont really know places

i know only one store here, a westbay autoparts

idk whats in your town.

 

[funkyab 10+ year member]

when i bought my first HO alt, it worked good for a minute then the regulator went out. i didnt suspect that was the prob, but after testing everything else realized that was the prob, got a bew one and all was fine...

your problem is very easy to diagnose... somewhere in your electrical setup and wiring, you have done something wrong or you are having equipment failure at the batt or alt level. Plain and simple, unless you have some crazy issue such as exposed wires grounding out a bit or dumping part of your voltage to part of your car.

 

[infamous_e46 5,000+ posts]

hye jason lmk if you need a batt or any type of wire or cable i get stuff cheap at work