For the ICV just follow the steps and they show the pics. I just put a good amount of maf cleaning fluid in the inspection port hole of the icv and cleaned it up followed by a wd40 soak inside. The throttle body...Yes take the top plate off with the vac lines. Also the I think you will be surprised about the 2 black flex tubes. Your throttle body will still be attached so just take the black rubber seal off the back clean around it and bend the spray throttle cleaner straw into the back of the throttle body and spray. Get a couple of cans, wipe clean and do this a few times followed by manually opening the butterfly plates on the inside and clean. Just turn the throttle cable on top. Grab that mechanics mirror and look in there to make sure it's nice and shiny to your content. Put everything back and your car my not like start right up but it will , and it should be smoother.