MY CAR IS IDLING UP AND DOWN on 1990 Acura Legend

MY CAR WILL RUN, BUT IT'S KEEPS ON IDLE UP AND DOWN I DON'T KNOW WHAT CAN CAUSE THE PROBLEM CAN YOU HELP ME WITH IT.

by in Richland, GA on May 03, 2011
2 answers
ANSWER by , May 03, 2011
Sounds like there is a vacuum leak somewhere at the intake manifold. Check all the vacuum hoses, make sure they are not disconnected or broken. Zee
ANSWER by , May 03, 2011
As Zee said vacuum leaks are most likely the cause but low coolant level or bad coolant temperature switch also causes this surging idle.