u/Ashamed-Letter-9774

I have a cobra 29 ltd on a power supply at an asphalt plant. I can't hear anyone unless they are super close and nobody can here me more than 100' away. I tried tuning the cb and the SWR reed around 3 still on the radio. I read that that could be grounding so I ran some grounding wire down to an earth rod in the ground. I also read rf grounding is different than earth. I know little about CB's but am trying to figure this out. It worked better last year, then when trying to use it this year it barely works.