have u changed your pcv valve and oxygen sensor? if it does this all of the time change the pcv valve. i didnt realize when the dealer tuned up my car over the yrs that they never changed that part. i have a 92 4 dr lx and changed the original one last yr. im surprised i didnt blow some oil seals.

if it happens after the car warms up then its probably the 02 sensor. it cycles in an open default mode. this part can last several yrs in hondas. well over 100,000 miles. they get lazy at about 80,000mi. hondas have large ones compared to american made 02 sensors. a bit of a pain to remove too if its the original. im not familiar with a 93 se u may have 2 02 sensors. one on the exhaust manifold and the other farther down in the exhaust.

also does your tach jump. it could be the distributor, coil or ignitor.