[rofester]

I drive an auto 2000 Forester S and lately it has had trouble revving past 3k. It barely hits it when my foot is 90% down.

 

[JStorm]

Any CEL on the dash? It may be in "limp" mode.....but it's almost always accompanied by a CEL.

 

[mdg]

Leads and plugs, Fuel/air filter maybe?