Originally posted by Rogerm60:
You will have to scrape the EGR valve. Don't use anything that will damage the valve seat or pintle. Do not get any strong chemicals up into the top where they can damage the rubber diaphragm.

Clean the IAC with carb cleaner and finish with silicone spray.



If you do use the silicone lube, definately let it fully dry before installing. I have not had any problems as I let mine dry in the Florida sun while I did other maintenance, but others have indicated that silicone can damage O2 sensors.

If you don't use silicone lube - go without lubing it. Should be fine, otherwise you could also try some light machine oil - like for sewing machines.

Must be that jumbly-wumbly thing happening again.