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Testing for a Vac leak , I have a bunch of people ask whats a easy way to find a Vac leak , I like Smoke Testing using a Cigar , I find a Vac line going to the intake , blow 3-5 big mouthfuls ( I dont in hail lol ) into the intake manifold through a Vac line, with it dark ( smoke shows best in the dark with a light ) and with a good shop light or good flash light and look for smoke , you will be able to narrow down where the smoke is coming from with 1-2 more mouthfuls of smoke , This works very easy , quick and cheap

Tom
 
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