what kind of antenna are you running? its probably already been said, but im too lazy to look back through the last 7 pages....if you're running a fiberglass antenna such as a firestick, then you do not need to run a separate ground wire. I have a 4 ft firestick mounted to my toolbox, and it works just fine. i get about 5 miles of range with it.
your swr might be too high...other than that, i would say to check your mount on your toolbox for anything that's loose. Try to look around for a cb shop or an electronics shop that tunes cb radios. I got mine tuned for 10 bucks.
