Engine mounts have been changed twice, first with cheap ones then with decent ones, which did cut down on the ability to for the a/c lines to bang against the car, but it can still idle rough enough for it to happen sometimes. As for the other suggestions, how about I go about checking those things? Most of the time I find this car pretty easy to work on once I know what I am doing, but finding information to fill in the gap between what I know and the minimum knowledge expected to understand the answers to questions here can be difficult sometimes.