 On August 1, 1986, the station switched back to Top 40 for a third time as "Z93" KDWZ, this time using a rock-leaning direction while avoiding titles that sounded Rhythmic or Dance oriented.Competing head on with the better established KRNQ and KLYF once again was not easy.On October 1, 1990, KDWZ returned to oldies by once again simulcasting KIOA (AM)'s oldies format as "All Oldies KIOA", along with a callsign change back to KIOA-FM.