Bad AAP is kinda a cure-all. There are so many drivability problems that are associated with that diaphram going bad. I've seen very mild idle problems to engines cutting out on the highway. It depends on how big the hole is. A couple very easy checks are:

Remove the vac line connected to it. If it looks/smells of gas, the diaphram is bad. Also, the no1 spark plug will look black and sotty, more so than the others.

Personally, when the AAP goes bad, its better to rebuild the whole carb and change out all the gaskets and the other 2 diaphrams. Plus the neddle seat and readjusting the float... If I only still had somewhere to rebuild carbs...

Josh