GM-GMC: rough idle, bad spring, scaned

Question
i have a 1989 gmc k1500 5.7 350. the idle is rough and all most stalls has new wire,plugs dis, button,erg valve, oxygen sencer and still running rich, idle is rough

Answer
hey jason... there are a few other things that can affect your idle and fuel ,......map ect tps knock and pcm to name a few... this really needs to be scaned for codes and maybe check the fuel presure regulator for a bad spring (a kinda common thing)  hope this helps