What should my voltage be when my car is running...

[Ripkon]

A new alternator want give you more voltage if its PCM regulated

 

[wew lad 5,000+ posts]

Well last night the voltage was 12.7 and this morning it is 13.7 I guess that's from the heat.

Either way I'm going to order a 250a ho alt from singer as soon as he answer my questions and sends an invoice

see:

A new alternator want give you more voltage if its PCM regulated

You need to make sure singer gives you an alternator that is not PCM regulated and gives you a bypass kit for your specific vehicle. You will come back and complain in a week about voltage if you do not do this

 

[danielbea122]

see:


You need to make sure singer gives you an alternator that is not PCM regulated and gives you a bypass kit for your specific vehicle. You will come back and complain in a week about voltage if you do not do this

My voltage at the main battery was 13.9 and 12.7 at the rear kinetik when it was 93 degrees outside after driving for a couple hours.

Guy at the battery shop said it's fine for now. My alternator has 90k miles on it so I'm ordering the new one.

I sent singer the model number off my alternator and he knows what car I have so hopefully he will know what I need exactly. Seems like he is trusted around here.

 

[danielbea122]

My alternator is in fact regulated

From singer:
"If you have the 2 wire plug (I do) called LIN bus ideally we need to stay on that plug. The bigger alt will stiffen voltage the way it should, that regulator design just does not allow us to achieve a higher voltage set point"

 

[BCotrell 10+ year member]

My alternator is in fact regulated

From singer:
"If you have the 2 wire plug (I do) called LIN bus ideally we need to stay on that plug. The bigger alt will stiffen voltage the way it should, that regulator design just does not allow us to achieve a higher voltage set point"

What is the year and model of your vehicle?

 

[wew lad 5,000+ posts]

My alternator is in fact regulated

From singer:
"If you have the 2 wire plug (I do) called LIN bus ideally we need to stay on that plug. The bigger alt will stiffen voltage the way it should, that regulator design just does not allow us to achieve a higher voltage set point"

Another person you can ask is JS alternators. They're mostly on facebook so you can try messaging them there.

I personally wouldn't bother if you can't bypass the regulator. Total waste.

Your front battery voltage should equal your rear battery voltage. If it doesn't, your wiring is bad.

 

[danielbea122]

What is the year and model of your vehicle?

2014 Toyota Corolla LE eco

Car does all kinds of things to save a few mpg. That includes shutting down the alternator completely until it's needed again.

 

[danielbea122]

Another person you can ask is JS alternators. They're mostly on facebook so you can try messaging them there.

I personally wouldn't bother if you can't bypass the regulator. Total waste.

Your front battery voltage should equal your rear battery voltage. If it doesn't, your wiring is bad.

My grounds aren't the best. I'll check all my connections again thx

 

[danielbea122]

Quick question. Should my amp ground wire be connected to the frame or to the second battery negative terminal?

 

[wew lad 5,000+ posts]

Quick question. Should my amp ground wire be connected to the frame or to the second battery negative terminal?

Ground your second battery to the frame and ground the amp to the battery

 

[danielbea122]

Ground your second battery to the frame and ground the amp to the battery

After the same drive I make every night with the amp ground to the frame I was at 13.8-13.9.

With the amp ground to the second battery it was 12.7 last night after the same trip.

I'm thinking maybe the original ground isn't very good so Im gonna try a different ground point with the amp ground to the battery.

 

[Popwarhomie 5,000+ posts]

You have a serious issue if your front battery is 1+ volt higher than your rear.

 

[danielbea122]

Well I do not know what it could be

 

[danielbea122]

Fried my first amp

It popped then started smoking

 

[wew lad 5,000+ posts]

Come back when you've actually done some troubleshooting