C-GT tune up

["Ken Keith" <ken.keith@specialdevices.com>]

My Coupe is out of tune.  I'd like to get it tuned up, and I wonder if 
this is something I can do myself.

Driving around seems find, but It has a bit of a rough idle.  It 
occasionally starts "loping" a bit at idle when the rhythm is just right.  
I'm sure there's more power in there somewhere too.

Apart from the new cap/rotor/plugs/wires and stuff, what kind of 
adjustments can I make myself.  I remember having a guy tune up my old '85 
C-GT, and he had an exhaust gas analyzer or something, and he adjusted the 
fuel mixture at the fuel distributor.  I don't have one of these 
analyzers, are they absolutely necessary?

What can I do myself and what do I have to have done at a shop?

Thanks,

Ken