if the warm engine idle is at 1050 with the iac disconnected, that usually means that some ignorant prior owner adjusted the stop on the throttle plate at some point in the past. that is what I found on my 'new' 92, for example.
the warm idle with accessories off should be around 500 with the iac disconnected if the throttle plate stop is adjusted properly. that way, the iac can actually control the idle speed.
NOTE: do not screw with this unless you are sure that it is wrong, because its a very easy way to mess up how the engine runs!