Check to see if any ground paint got on the walls of the jack hole. If any part of the jack touches the walls, or gets close to it, it will do that. It could be bad soldering. We had different people doing them. The jacks also suck. One of the feet might have been bent putting it in also, so the pressure might not be there. It could also be that the guitar weighs 95 lbs and it might be fucking with your chord. It could also be the govt. fucking with your signal between your guitar and your amp. You could also be on drugs when you plug it in. Bm