High idling 4AC after engine swap

[squish_m8]

So yesterday I dropped a 4ac in my daily bus (KE70 wagon) yesterday after losing a cylinder in the last engine. The new engine runs fine, when cold it idles about 1400rpm but once it is warm this climbs to 2000-2300rpm which seems quite excessive to me. I would like to know what could be causing this and how I can make the car idle normally once it is warm.

Cheers, Kieran

p.s. Also I have tried playing with the idling screw and timing and this made hardly any difference.

[oldcorollas]

intake leak somewhere... or the stop screw that limits the throttle movement... or the throttle cable position (too tight so is pulling on throttle)
etc