About my Previa and Sienna

Before I get into this, let me give proper thanks for the info and pictures from zenseeker.net, toyotavantech (theMan) and Uri of Previadiaries.wordpress.com These sources really put pictures and what they did out there.. so now I 'm going to jumble them all together as I am going to do these cleans soon! ---------------------------------------------- After spending a pretty penny and 2 months having the motor rebuilt. I kept reading about the black flakes in the coolant.. I mentioned this to the shop that I had my van worked on. At on point, I asked for the throttle body  and IAC valve as it was just sitting there, but got the "dont worry about it, we'll take care of it". I even showed some blogs of that covered this issue. After getting the van back... boom, check engine light and the shop ran the code. In all honesty, I was kinda upset that they did not cover this part, even after I had mentioned it.  P0401 Error Code : "Exhaust Gas Recircul...