When my 2.6 started misbehaving at idle I found that the idle signal switch on the throttle body was not functioning properly, but fixed it with a few shots of WD-40 and it's been fine ever since. I also checked the microswitch on the linkage and it was okay.

Chances are your problem is something simple. Unless the engine is exhibiting bad behavior at other than idle, I doubt of the airflow/fuel meter needs to be replaced.

These cars have a fairly complicated idle stabilization system, so if they misbehave only at idle, this system should be checked - sensors, wiring/connectors and idle air control valve.

Others have reported solving idle problems by replacing the airflow sensor switch on the fuel meter. According the the KE documentation I have this potentiometer is only used while the engine is warming up. Go figure!

I think you need a second opinion.

Duke