98 Jeep Cherokee sputtering replaced cps fuel filter fuel pump spark plugs distributor cap fuel pump regulator tps fuel injectors have been tested and cleaned no vacuum leak what else could it be?
Probably the upstream o2 sensor (could be downstream). Had the same problem, took me a while to figure it out. Easy fix. I replaced both 02 sensors for about $100.
If this vehicle does not have an electric fuel pump, then the fuel pump diaphragm has a hole in it. Replace the fuel pump. If it is fuel injected, which I think it is, then you have one or more fuel injectors that are bleeding off after shutdown. Have the fuel pressure regulator and the injectors checked.