S10forever

HI,I have been having a problem with my 94 sonoma Z engine,it starts cold but lopes for about 2minutes then the idle smooths out i changed the
ICS this morning it not change cold running.
The one i did not do was unhook the battery to clear any codes.
The other problem with fuel system is it bucks sometimes after sitting for a few minutes does this off and on will replace TPS today see if that may help any input would be appreciated.
By the way on the loping problem if i bring engine rpm up for a little while with my foot
you can hear the engine rpm's smooth right out,if i take my foot off gas pedal it goes into cold idle mode until it warms up,thanks