2001 forester runs poorly

I have a Subaru Forester that runs bad. It idles rough, hesitates on accel, is slow to accel,and bogs down. This runs as if its lean. I have checked plugs, fuel pump, fuel filter, looked for vacuum leaks, etc. no help. I was looking for a mass air flow meter on this but didn't find one. Anyone have a suggestion. This car has close to 100,000 miles on it. Thanks, JVP

you have a map sensor and if i remember corectly its in the intake manifold