[jaminjim]

What they finally did to mine was to knock the idle down from 730 rpm's to about 630 or so. They said that it was hunting for the idle speed. By that they meant that the ecm would sense to low of an idle and then when it saw to high of an rpm it would send less fuel, so it was hunting for the correct idle. once they backed the rpm down at idle it went away. My truck was worse when it was cold outside.