i have a noise suppressor, and it works … a little, you are never going to cut out all the noise…. have you run the radio power straight to the battery with an inline fuse? that will help a little, and make sure it is grounded well. i am not sure but i would imagine if you got a more expensive suppressor it would work better than a cheaper one…
CB radios are very sensitive to picking up electrical interference from your car’s engine because they operate on AM.
There are filters you can install in the engine or on the CB power cord wires:
Try searching “CB Radio Noise suppressor”
i have a noise suppressor, and it works … a little, you are never going to cut out all the noise…. have you run the radio power straight to the battery with an inline fuse? that will help a little, and make sure it is grounded well. i am not sure but i would imagine if you got a more expensive suppressor it would work better than a cheaper one…
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