smoothed and filled red pearl 94
my 94 4.6 dies when it is put into D or R. as soon as it gets down to about 500 RPMs it simply stalls out. gotta be my IAC valve, right? is it even worth it to clean it? i notice access to it is not easy deep down under the wiper cowl and the ford manual specifically says not to clean it with anything. people on here seem to recommend cleaning it like it may help. soooo clean it or replace it with a new motorcraft IAC? any help is always appreciated.