I searchedon Yelp and the top rated Salvadoran restaurants in the area:

El Ok Salvadoreno Restaurant
14516 Jamaica Ave
Jamaica, NY 11435
Neighborhood: Jamaica

La Cabana Salvadorena
4384 Broadway
New York, NY 10040
Neighborhood: Washington Heights
(212) 928-7872

Full results here:
http://www.yelp.com/search?find_desc...ork+City%2C+NY