Hello everyone, first post here so here it goes.

Recently my 06 Elantra Gls 2.0 was facing rough idle. For codes check and replaced TPS and IACV. Rough idle went away. Recently the car will hesitate and light throttle from a complete stop and while maintaining speed around 40 to 45 mph. Took it to shop and they said they adjusted the TPS and reset the adaptive values for the transmission. This worked for one night. Going to work the next morning it showed up again. Does anyone have any ideas what this could be. No CEL ever came on. I'm at a lose.