I have an aftermarket stereo, and speakers, and I'm wired for subs. So I used to be able to run any volume without power problems. Now I'm at volume level 10 and any higher than that, my stereo will shut off. When teh stereo is on all interior lights are dimmed with just that.
So my thoughts are that my alternator is going out. I just want to verify before I buy a new Alternator.

 

Have you checked engine ground resistance?

 

after you check the ground, measure the output of the alt (when running you should see close to 14V)

 

Alright, the ground check is gonna be in my manual?

 

You can always have your alternator checked at an autoparts store for free thats what I did with mine and my sxt was doing what yours is and it ended up being my alternator was fried.

 

You use a multi-meter and measure resistance on the ground wires. The lower the better.

 

She's going to a shop soon, I got a check engine light today, I have a cylinder misfiring, and the ignition coils I guess need replaced. Anyone wanna guestimate this repair cost?

 

dont replace the coil untill u confirm its bad
these things will miss when they get a little oil on the plugs

what code do you have that brought up the CEL?

 

I just took her to autozone, and had them pull the codes, they told me coils and misfire.

 

I think I sucked up some water with my CAI (please, no one start an arguement) but yea, I think that caused the misfire for sure.