hey did you ever figure out that problem with your truck with the funny idle and then it smooths out? i am having something similar, my trucks starts fine but if I go in to the store or whatever and come out 20 minutes later ill start it and it will lobe for a bit and smooth out.. I thought it was a voltage problem because my voltage gets really low (at least on the gauge even though they may not be accurate) when I have accessories on such as fan and headlights... its almost to the 8 but it up about 12 when driving.. anyways I replaced battery, alternator (VR was shot), ground and pos. wire, Im running out of options here.. any clues. oh and when it lobes it smells like soap lol i guess its the pure gasoline idk it just smells like bubbles. Any help would be great, could it be ignition coil, something with speed density, i hate this problem and no one else has had one similar but you... sorry for the long message just frustrated.