I've had this '01 Disco for about 3 months. It has 69,000 miles. It is starting to miss occassionally when I have it under a load. The typical siutation is when i've slowed down and then go to accelerate and the tranny lags in 4 gear and the engine is lugging a bit. It is usually a single miss (rather than a bunch of them) and it seems to be getting worse.
So far my Innova 3100 OBDII reader says "no codes".

The Rave CD basically sayss to rely on diagnostic codes to daignose igntion issues.

I don't have a problem getting a tune up but wonder if I should wait for a code to show up in case it is related to something else.

If I go for the tuneup...is there more to do than plugs, leads and coil packs? Are there other maintenance items that are best done when you are doing the coil packs/leads?