idle issues

[97ranger19]

ok the computer reads o2 sensor problems i changed them all out and my 1997 4.0 ranger still idles way to low and when in drive waiting at a light the idle will jump and almost die if not die any suggestions to even out this issue

 

[t0x1k]

Check your idle air control motor if you have one.

 

[nlarr81]

vacuum problem

 

[necessaryevil]

vacuum leak would cause it to idle high, but run rough. i would pull the idle control motor off and clean it real well with a can of carb cleaner