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Old 08-13-2012, 09:47 AM
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1990 560sel Vacuum Test

My 560sel has a slight miss , which I guess is caused by a vacuum leak or a bad injector. I heard that a SMOKE TEST is sometimes used to search for vacuum leaks . Does anyone know how to perform this test?

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Old 08-14-2012, 08:21 AM
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Join Date: Nov 2002
Posts: 804
you apply smoke to the intake after sealing off the airflow meter. it requires a tool most techs and many shops don't have. look at the link, vacutech is one of many brands and not a requirement, just for reference-

vacutech smoke machine - Google Search

good luck, chuck.

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