Hi I've got an '84 GN,at times it seems sluggish at low rpms(pre boost)once boost is engaged it's got loads of power but could always use more, also notice uneven idle at times.The Car is completely stock with K/N filter, was wondering wether it was the injectors they are the originals.
check your idle air control valve this will give you a uneven idle.you should replace the injectors if the car has 75,000 miles on it or have them cleaned. i find it's easier to just replace them as long as you have them out.