Greeting,
My HIGH mileage (220k) '95 Grand Cherokee (4.0L automatic) is occasionally idling rough and the rpm's will drop to a near stall just after coming to a stoplight, and sometimes stumble just as I'm taking off again. All of this is under normal driving conditions, no hard breaking or acceleration.
Otherwise the car runs great. Even when it's acting up as described, it's smooth and powerful above 1000 rpm. Recent new plugs, wires and fuel filter. Bad fuel is unlikely since this has been going on for a while and I buy gas from many different places I use premium. Everything else seems normal.
The injectors have not been serviced in a long time. Could they affect just the idle? I'll reiterate that the vehicle really runs great most of the time.
Thanks for any ideas, Tom