okay when i start my crv up, it idles high for a couple of secs then normal, and after that couple of secs it starts to idle up and down, and sometimes it doesn't, then the car will stay for a couple of minutes and then shuts off by itself. what could it be, clean the iacv, throttle body, and got new fuel filter already.

 

What year ?

 

it's a 98

 

maybe the IACV ?

 

cleaned it already

 

that's a vacuum leak.. and good luck!

check all the brake booster hoses, the pcv valve hose, the pcv valve itself, all the little vacuum hoses going to the IM and to the map sensors, etc.