This isnt an audio question. What Ive noticed since I put LEDs all over my car is that you really notice the voltage fluctuations caused by the alternator. Sometimes I think I should put up an epilepsy warning sign. So, since the entire car has this voltage problem, would it be possible to put a big cap in parallel with the battery so that the entire electrical system will have a more constant voltage? This might also reduce the effect of all the lights dimming when you push the brake pedal... What do you guys think about this? If itll just cause problems Ill just put a little cap on the lighting circuit. Maybe smoother power would make the engine run better.

I cap would provide you no benefit.....you need a better alt to keep up with the power demanded

well Im not looking at it from a more power perspective. Im looking to eliminate the flickering effect the alternator produces.

You would need a whooooole lot of LEDs in order for it to cause a problem. That'* one of the benifits to an LED... low current drain.

Something tells me that something else is wrong. Battery/alternator connections, ground connections, etc.

The problem wasnt caused by the leds. Its not really a problem per se, but you do not notice the flickering with lightbulbs, but leds turn on and off so fast that the little bit of ripple is noticable.

Any flickering is abnormal. Since the LED'* are very little draw, you have a pre-existing electrical condition that should be repaired, not band-aided.

I would upgrade your alternator and battery wiring to 1/0 and that should help the flow some.

1/0 is a little excessive.

4awg would make a big enough difference over stock. Which is 6/8ga if I remember correctly.

First thing I would do is get some dielectric grease and a file/sand paper and clean up all of the grounding points to make sure they have good connections.

So the flickering isnt caused by the alternator? I wish I could take a video to show you what I mean. Its very slight and you only notice it when the engine is idling low. I just went outside and measured the voltage and it fluctuates from about 13- 13.8 volts. Does this sound normal?