I did the 3g upgrade a week ago and due to the bigger 2.5 inch pulley I had to get a bigger serpentine belt. I went from a 90.5 belt to a 93.0 and now I get a loud screach at start up. I also noticed my lights were flickering and amp gauge was moving up and down the first time I drove at night. Is my belt to big? What size are you using? Any suggestions greatly appreciated.