I pulled my intake off of my 95 3.0. They have a lot of build up on the inside of them. I was wondering if this is normal? Seems a little excessive for 120,000 miles? Was wondering what would cause it to do that if someone could enlighten me! Also took the cover for the cams off and it’s just as dirty as the intake is. Also wondering what I should use to clean the cams off? Was going to use some carb cleaner after some thought not sure if that would be the way to go!