you can check for leaks with propane or wurth and some other Co. make nonflamable leak detetion fluids.just spray or run a small tube w/propane aroung the joints and rubber part of the gasket with the engine running if the engine speeds up or smooths out if you already have a rough idle then you've found your leak.
you need the gaskets,paper M5 gaskets, throttle to airhorn o-rings, injector o-rings,and it a good idea to replace the small 90 deg water hose at the front of #1 throttle coming out or cylinder head as is is much easier when throttles are off.and you might need one or two of the vapor hoses that come out of plenum or up from the IAC motor as these are often brittle and break when you try to remove them.

i think i need new intake gaskets and im wondering how you can tell if there are any leaks? i know there is some kind of test you can do but im not sure. also when i replace them what else should i replace when im in there? thanks
chris