GM-GMC: rough idle, bad spring, scaned
Questioni 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
Answerhey 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