Hello JeremyW83, I don't believe that you'll encounter any real difficulties with changing out your glow plugs. As to your idler, I am not familiar with the specific idler control that you might have. Is it electronically activated or is it vacuum controlled? If electronically controlled I would look at electrical connections (check for loose connections, corroded connections, and bad grounds) and mechanical linkages (might have frozen or binding linkages) first off. If it's vacuum controlled look for vacuum leaks in the lines or for a bad diaphragm and check linkages as well. Good luck and best regards, Allan