1985 Ford Tempo

[jimbob75]

Hi Everyone,
I am a newbie here, glad i found this forum. I have a few questions. My idle is high when first start the car and it stays that way until i drive for a 1/2 mile. I think the car runs a bit high when i am driving it also, but i do notice when i park the idle is high for about a minute or so. The idle speed control motor has been replaced and so has the throttle position sensor, any other suggestions? I also would like to know what are the signs of the egr valve or sensor going bad.
Thanks

[stv840]

you may have to clean carbon build up out of iac it also builds up in egr clean with carb cleaner