As I am, and in each case the failure of the engine to accelerate was put down to icing, the "carb" heat was not used during the descent at idle, and the engine wasn't "cleared" during the exercise. One particular PA-28 carb. engine( depending on the venturis fitted) is particularly prone to ice buildup, as are many smaller Continentals.
No piston engine is immune, regardless of carb. or injection.
Now this is an interesting twist!
Tell me how a fuel injected engine may suffer from induction icing - without flying in conditions conducive to strucural icing?
Hardly the sort of conditions in which one would be simulating an engine failure!
Dr 