i have a manual 2.0L 16 valve camry 1992 sv21 model and the throttle does not respond good and how could i get more power out of it

take off the intake hose clean it out with throttle body cleaner.
buy a bottle of seafoam and run it through your brake booster hose.

make sure ur air filter and air ways aren't clogged either.

Sea foam rocks.... Def. use that but, i would use it through the pcv valve hose becuase its in the middle and would dissapate better through out the intake manifold