1997 Dodge Ram 1500 2 wheel drive 5.9 liter engine SLT LARAMIE extended cab

Why do I have a touchy gas pedal after one start while I’m driving and after I start it a different time it feels almost sluggish? Also I have a very slow oil leak somewhere but have no oil spots on the ground and no burning oil smell and no blue or black exuast smoke what would cause this?