We are here to help, so don't feel funny asking any questions. The intake manifold is located on the top of the engine. It bolts to the engine block. Also, the throttle body is bolted to the top of it. If you look straight down at the top of the engine, you will see a large aluminum part that bolts at each side of the engine. That is the intake. If you are still unsure, let me know and I will try to dig up some pictures.
As far as the converter, with the engine running, listen for ratteling, hissing. Sounds coming from that area. Also, check the exhause to make sure there is a good amount of pressure coming from it.
As far as a visual inspection, when a converter is plugged, it will get so hot when the engine is running that it will turn red hot. If you look at it (after driving) with the engine still running and it is glowing red hot, chances are it is plugged.
Let me know what you find and if you have other questions. Remember, the only dumb question is one that is not asked, so please feel free to ask anything.
Wednesday, February 3rd, 2010 AT 7:48 PM