high Idle 318

Need more info. What does "fiddle with the fast idle cam" mean? Are you saying that the cam is still engaged and not allowing the carb to return to curb idle? If so, then the linkage is out of adjustment or the choke is not fully opening.
The fast idle cam is staying where it idles high i have to adjust it to where it isn’t idleing super high. If not adjusted it idles high and diesels. Once adjusted it runs great i was more or less trying to figure out the culprit, i daily this thing and this is my only issue and i dont want her laying down on me.