Why my revs may be going up and down even when in drive. on 1991 Toyota Corolla

i have been told maybe something to do with the auto choke any ideas, had a split raidioator hose

by in Wake Island, HI on June 17, 2013
2 answers
ANSWER by , June 18, 2013
Fill cooling system completely! Low coolant will cause that.
ANSWER by , June 18, 2013
OR WATER THE CAME OUT OF BLOWN COOLING MAY BE IN SENSORS