[kevinb70]

442 code = you make sure your gas cap is on tight? 3 clicks.

401 egr code. DONT REPLACE THE EGR.

get new throttle body gasket, a tomco kleen-screen egr gasket (+ the plain lower egr gasket) couple cans of throttle body cleaner, wire hangar or pipe cleaners (or both) maybe small brass brush

remove egr, clean it up, remove the throttle body, and clean the air passage between the throttle body and egr. clean throttle body. suggest not removing the iac. hit it with TB cleaner tho.

remove throttle body butterfly (torx bolts i think) clean thoroughly with throttle body cleaner.

make sure flexable egr tube isnt clogged

dont attempt to clean out the inside of the uppper intake manifold (big port) its a useless effort... just clean the small egr passage in the upper intake manifold

might hit the iac shaft with some wd40 or other light lube