didnt want to start a new thread, but has anyone got a fix for this prob ?

i've got exactlly the same problem cept in a dc5r,
was gonna try cleaning the IACV but noticed a gasket between the IM and TB, didnt want to try just yet until i have a spare gasket just incase.

heres a link i found handy
http://forums.clubrsx.com/showthread.php?t=288936

also to add more info,
went for a drive around the block,
got back into driveway and thought i'd run a few test,..

car is in neutral
- air con on (doesnt matter what setting) -> revs drop to 500 then back up to 700
- lock/unlock doors -> revs drop to 500 then back up to 700

could it be a bad ground by any chance?
or could anything else cause these issues?

i am throwing a CEL but i suspect thats due to headers+high flow cat

cheers,
steven