Sorry to bother you all again with my little problems.

2002 TJ Magna advance 43,000kms

It seems the car has a miss or stutter not sure what one when cruising between 80 and 100. most notisable around 90km/h it seems to happen only during cruising. Fine WOT or accelerating and arround town. just seems to buck or loose power for a split second. no drop in rpm or speed.

Thanks Again in advance

First Basic Things to check/replace:
Spark plugs and leads
Fuel Filter

Things to try after:
Run 98 octane fuel for a few tanks
Run a bottle of injector cleaner (added to fuel tank before filling)

If these don't fix it, then look into dizzy & injectors etc.