carb heat and an increase in RPM...

[mayday1]

Thanks everyone for the info. I'll know better the next time this occurs (if the weather ever gets better in chicago for some VFR flying).

 

[Bus Driver]

Obstructed induction ducting or air filters?

 

[deez_nutz2000]

You have a mixture problem.....go talk to any mechanic and tell him the situation.....Guarantee he will tell you the same thing.

Ralgha.....you may want to try thinking outside the box, it isnt good to get stuck in that "rote" level, especially as an instructor.