Hi there. The first thing you want to look at is the idle air control vavle. It's under the carb lookup iac vavle. When on idle it let s air in with the plate being closed. Thay get blockt. Before removing see if some spray clean helps. If u remove let me know I'll send u more info.
all so check your Pcv valve it's the pipe.on the right coming out too of cr anck it's a little valve pop is out give it a good clean.