I know theres alot of posts on here about poor signals on the radio, but i think my problem is a bit diffrent. i have an s3 8l and if i switch my radio to a preset channel i get nothing, if i turn the car off and come back to it later the same presert channel it was left on plays clearly with no interference. But if i try to manually select any station fm/am i get nothing but static?? any help appreciated! Liam.