[Aardvaark]

Gordy. FYI, if you don't already know, the plastic top cover on the flow meter can be pried off carefully since it's only held on with silicon sealer.
Once off, you can carefully check the operation of the potentiometer arm as it wipes across the printed circuit board resistor and the spring tension
that holds it back against the air flap in the air duct. You can clean the printed circuit carefully with a small amount of spray contact cleaner.
Reseal the cover with clear silicon after you clean out the old sealer in the seal groove.
Don't be tempted to adjust the spring tension to increase or decrease the rate the wiper are advances as that will make the engine run too lean or rich as that will effect the voltage signal the ECM senses. Also don't try to retension the wiper arm as that will just cause more wear on the circuit board.

Of coarse you should check the air flapper for free movement and cleanliness
of the air flow path.