Good tip about the filter, that could easily starve the engine at higher rpms. And, after all, a 2003 with 2300 miles? It had to have sat around more than it ran for the last four years increasing your chances of mini-bits of crud fouling the carbs, the filter or both.

A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort. Herm Albright (1876 - 1944)