Hi everyone. I thought i would make my first post today I've been having an ongoing issue with the 700rpm dropping down to 4- 500rpm at stops, red lights, parking since last fall, i coudnt figure wtf was up, seen alot on the sights and i did the tb cleaning, plugs, checked sensors, checked volts, new battery, new throttle body, you name it. Its kinda weird cuz it started happening a week after etc light, and just put a new battery in a week before. Its been like seven months like this. But this week i've noticed it wont drop down with the a/c on at all, none i've tried everything to make it do it with a/c on, but as soon as I turn a/c off and pull to a stop idle drops??? any ideas, anyone else notice this? thanks would like to hear about it.

 

reset computer maybe?

with the ac on, maybe the "demand" on the truck engine makes us for the lean or rich problem?