Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_83 ( grid INTEGER, laps VARCHAR, time_retired VARCHAR, driver VARCHAR )

### Question ###
What is the grid total that had a retired for engine, teo fabi driving, and under 39 laps?

### Accurate SQL ###

SELECT SUM(grid) FROM table_name_83 WHERE time_retired = "engine" AND driver = "teo fabi" AND laps < 39