2007 Dakota Quad cab 4x4, multi issues need some sugestions please

I have owned this low millage ( about 80K) Dodge Dakota 4.7 for about a year and a-half, most of the time it seems a good and reliable truck but some strange recurring and intermittent issues. First some history, initially showed up as drive-ability issue that happened twice about 4 or 5 weeks apart about 10 months ago. Both times with about a 1/2 tank of gas. After idling for several minuets it would stumble, have no poor and seem to be choking out and not able to make head way more than to get out traffic. Once after limping to gas station and filling up all was good again. Anther time simply waiting 15-20 mins all was OK. No CEL or code until later. First Though fuel pump issue since the code that eventually showed up was something about lean mixture ( don't recall the code exactly ) had the Truck checked out full expecting needing to put in a new fuel pump but they said it was fine and could not find any other issue that might need attention. All was fine for several more months, but when getting an air inspection was told the gas tank cap was bad so replaced. ( again no CEL and no issues) including letting the tank get to or below 1/4 several times...
Fast forward several months ( and after a move to another state) with no issues...
Have now had a couple of times the CEL was on, first though fuel cap and after the next fill up CEL out and all was OK again for a few weeks. Now CEL on again - no codes? tried to check the codes twice on different days - nothing shows up. No recurrence of the drive-ability issue like before but have noticed that sometimes it seems to idle a little rough on start-up and of late the mileage is down from normal ( which has never been that good but better that the current 9 or 10 MPG) Also twice, once a couple of months back (no CEL) and again recently ( with CEL on ) it would surge on idle after start up and be idling rather high (over 1200RPM) have been keeping the top half of the tank full most of the time but this has now happened again with about ( just over) 1/2 tank.
Like this truck but begining to like it less.
Any help would be appreciated, in the mean time I am going to try and look for the obvious stuff like a vac hose off ERG valve etc, and some other things I was able to find here in the forms.
Thanks in advance!