revs up and down wen its on neutral or park on 1995 Honda Civic

my civic revs up and down wen its in neutral or park anybody know how to fix this

Asked by for the 1995 Honda Civic
yes i forgot the name of the sensor but it has to do with the intake of air. theres a spray that is to clean autozone or werever you buy your stuff just get that and spray it on the intake and rev up the car a lil and it should be good