2001 Pontiac Montana

Engine Performance problem
2001 Pontiac Montana 6 cyl Front Wheel Drive Automatic 109000 miles

hi I just replaced head gaskets on my van, had heads cut and checked before replacing. Ok so I finished the job and the van ran fine until I test drove the van I drove around the corner and back by the time I got back around corner the van began to idle very high in drive like around 1300 rpm once in park van idle was 2900. I checked the tps sensor and was within specs, sprayed carb cleaner around intake to ckeck for vaccum leaks no change in idle. I tried un-hooking battery for 5 min but same thing after hooking back up. Any suggestions would greatly be appreciated
October 14, 2010.

Try cleaning out the idle air control valve and see what happens

Oct 14, 2010.