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Steve Wood:
No, don't do that..use your scanmaster..it works much better. Just unscrew the iac adjustment screw about a 1/2 turn at a time and stop/restart the engine to reset the iac...after each restart, check the iacs and continue until they are 15-25.

Be sure the engine is fully warmed up, in park, and the ac is off.
Well now that sounds a whole bunch easier... So much for the Buick service manual... LOL
 

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Guess that would explain why I could never get mine to drop. Shutdown/restart engine. Hmmmm.
 
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