everyone should replace the ground wire from the battery and run one to the engine. I had dimming when I would turn my stereo up with a subwoofer. This eliminated it and has seem to increase the power to my engine a bt, it is definitely worth it. I was too lazy to the the 4-guage wire myself and had a local car audio shop do it. This is a must do!
I have filled up twice since I had the new ground installed on my Charger and I am not koking but I get now about 20mpg. I do the math every time I fill up and I normaly average about 14.5 mpg and I not get about 19.86 and that was all driving in the city. You all should look into this!!! your engine is not grounded correctly causing the entire ingntion system to run poorly!