YODAIII

Hi all, the a.c. On my truck blows ice cold but only while driving. Once i return to idle- hot air! I attempted to set the a.c. Idle with the black plastic valve located just to the right of the throttle body but am getting no reaction while adjusting the screw. I thought that i'd start there since it works while driving or at a higher r.p.m. Put the dwell tach on it and the idle doesn't change with the a.c. On. Any thoughts on this problem or experience setting the a.c. Idle?

Ezrider_92356

ill be watching this thread, my ac is currently not working need to replace a line, belt is off but when i press the ac button it does not increase my idle, if i pull the vacuum line off that goes from the vss to the where the ac idle adjustment screw is and put a vacuum pump on it, it ups the idol, i'm thinking maybe the vss is bad.

TNRabbit

If cold when moving & warm at idle, you aren't getting sufficient airflow through the condenser. Check for bugs, mud, etc. & is your fan working properly?