ok I have a 98 Civic DX with stock engine. Idle keeps going up and down up and down. I got a new Throttle body and a new Throttle body Gasket, I clean my IACV. I checked vacuum lines all of these are fine. I dont know what else to do. It is really anoying when you come to a stop and the idle keeps going up and down. HELP ME figure this out anyone