Tune up (coil) question

[dghii]

I'd leave the coils alone and replace only when needed. Cool thing is, this is one item that you'll get a pretty definitive code for, pointing you to the offending cylinder.

As an aside, if your plugs are old, replace them, along with tubes and o-rings. You can inspect your coils for cracks at the same time. Thing is, plugs, tubes and rings are cheap compared to wholesale change of 6b coils.

[911monty]

I recently started to change plugs on my 98 base with 100k miles. I stopped when I found EVERY single coil was cracked on at least 2 sides. There was no indication of a problem, car ran well. I had previously changed plugs and inspected coils @ 70 k. Ordered 6 new coils and changed plugs, tubes and coils. I'm with your mechanic.