Idle keeps me cold!

[balkideath]

Here is a strange one for me - I have an '82 pickup, the truck runs great when the air conditioner is running. As winter is coming I turned the air off and the idle became really rough. Do I need to adjust my idle? I know in new cars when the air is turned on the idle increases to meet the demand - would this be happening to me, just having the regular idle to low?
Thanks for any help!

[JustSayGo]

Yes on your carburated engine you have three idle speeds to be concerned with. A/C on, Idle W A/C off, And engine off so that it does not diesel.

[balkideath]

Thanks!