My 1995 Acura Integra starts running roughly at 3500 rpms. Kept below 3500 rpms, it runs fine with no problems. It just started doing this. Never before. It seems there is somekind of govenor that kicks in at 3500 rpms. How can I get rid of it?

If the fuel filter hasn't been changed in the last 2 years, that is a good place to start. Also,have you given it a full tune-up recently? those are the easy suggestions. Typically the major stuff shows up with a "check engine light" indication. My '97 Civic acted similarly to this, and it ended up being the fuel filter(at 167,00 miles). Cap/rotor/plugs or other ignition system faults will also limit high rev performance. When in doubt, Autozone will check your computer system for no charge if you're concerned about sending good money after bad.