i have a 02 dodge ram, the problem im haveing is at a stop the truck is idleing rough never stalling out but will drop to about 600 - 800 rpm it only does this once and awhile, also when i was on the freeway last night i had the cruise set at 55 the rpms were at about 1500 but kept kicking up to 2000 rpm like i was going up a hill, i was on a flat straight away when this was going on, no dash lights turn on or have turned on when this has happen, also i have no leaks anywhere under the hood. it also seems like i am going through more fuel lately