1992 4x4 blazer 1500 power stering problem
 

I cchanged all the front end parts ball joints tie rods pitman arm control arm etc. power steering pump too . everthing is good and tight but my power steering lags at idle or when brackeing .I have also changed the tps sensor the knock sensor the map sensor the escmodule. it sound great but idle is a little low after it warms up. about 500 rpms in park or in drive? whats the deal. love input im baffeled.