002 Line/instrument input issues

MetalJonesy

more metal, more booze!!!
hey all, ive been using th 002 lately just direct in for pod farm for late night recording, and on channels 1 and 2 when the gtr is plugged into the inst input and i raise the gain on the pre when i play into an amp sim, i get weird artifacts after the note (that sounding like spring noise from a trem system) however if i plug the guitar into 3 and 4 with the same preamp gain, i dont get any such artifact, its only really when im tracking, anyone have any idea?