HotZ28, the wires were changed two years ago too. Unfortunately, I don't know the make or the type of the installed plugs. Since it's not going to hurt, I was thinking for a DIY project to replace the plugs and the wires myself, maybe that'll help the issue out. Since this is my first time replacing plugs and wires on a 2001 LeSabre, can someone recommend a good brand for both. Thanks in advance.