high idaling

I have a 1994 silverado with a 5.7 I have replaced the IAC sensor TPS sensor,EGR valve, and adjusted the timeing The idal is still high and the engine light comes on showing a 35 code IAC sensor

I have a 1994 silverado with a 5.7 I have replaced the IAC sensor TPS sensor,EGR valve, and adjusted the timeing The idal is still high and the engine light comes on showing a 35 code IAC sensor

did you clean the throttle body IAC pasageways??????

then check for vacuum leaks...