Purchased a edge programmer 2 days ago, installed it on my truck right away, only set on stage 1, everytime i would come too a normal stop the rpms would drop down too about 350! then stall out.... I figureed the truck had too relearn soI put some miliage onit too try and fix.... did not help... so I hadnt changed my spark plugs since i bought the truck a couple years ago so I changed them yesterday, cleaned up my battery posts and followed the prcedure in the owners manual on how too re teach the computer the idle after disconnecting the battery....... did not help so on the ede tuner I raised the rpm by 150 which has now solved my stalling issue except for when I have to come too a quick stop itll throw the service engine light on with a P0506..... i will cleanmy IAC tommorrow aswell my throttle body....

one thing i noticed when cchanging my plugs is under my air box there are 2 plastic vacuum lines which one is not hooked too anything at all? i cannot see anyplace it would go either.... i assumed at the time that it was a vent of some kind?

any suggestions or insight in my problem would be much appreciated.

only mods are a dual catback.

 

try setting 2 on the edge, that is what 99.9% of people are using.

 

Year and engine /miles would help

 

Mine did the same thing a couple of days after I installed mine. I just added 150 rpms to the stock idle and it's running fine now. Idles around 700 and I haven't had any trouble codes thrown

 

Those lines are for ur vacuum hubs that enable 4x4. One goes to the hub for vacuum the other is simply a vent to release the vacuum in order for the front hub to engage.