How can you find vac leaks?

OrangeMustangGt

Founding Member
Mar 7, 2002
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Cape Cod, MA
my car has been idling badly, meaning it takes forever to idle down it stays at like 2 grand for a couple secs then drops to 1. Also when i start it, it really surges badly, till it dies. ive tried messing with everything, and now i think it may be due to a vac leak.