my friend and i have noticed that my 96 jimmy and his 95 have a common problem. our back passanger plug wires keep burning out first. if there is ever an idle problem all we have to do is replace that wire. i put heat tape over mine but ill have to wait a while before it should happen again. is it just because the exaust manifold? anyway its just an observation.

There should be wire guides that you guide the wires through to clip them down.