sounds to me like the EFI relay which is under the dash, or the igniter which is in your distributor. these ar two common problems associated with the 4th generation accords. the igniter will run you about 100 from a local dealer. i think the 91 does not have a igniter.
here is the dist assembly for my car (92lx)
http://www.hondaautomotiveparts.com/...IBUTOR+%282%29
and here it is for the 91 lx( i assumed it):
http://www.hondaautomotiveparts.com/...1%29+%28TEC%29