Re: low rpms at stops and bad gas mileage
Update per my low rpm problem at stops....sorry for the delay. I followed Franks direction with the o2 sensors, as that was in the back of my mind, even after the dealer diagnostic testing showed nothing wrong with the Jeep.
Now it turns out our Jeep with a single exhaust, has (4) o2 sensors instead of 2. The reason is it is a California emissions Jeep, sold new in PA, with no info on the window sticker or anywhere else. I was under the impression that this info was to be noted as such. At any rate, along with a new oil change it does run much smoother. It does still fall in rpms at stops, although not nearly as often and overall runs better and smoother.