1992 Dodge Dakota Idling problem

There may be a problem with fuel pressure but the computer stores codes for sensors that affect idle speeds and quality. So a scanner(see section on scanner) and fuel pressure test eliminates things until you can find the right problem. If your air filter is clean, there is not much to do except use these methods. As lomg as it is only at idle, out of gear it may be from the clutch also. Very rare but with high mileage, many things are possible.