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Can I detect the vacuum leakage (stethescope)? I doubt it but its not totally impossible. It will be near the misfiring cylinder. I would look mainly around the intake gasket.
Is fluid leakage from the gasket area evident when there's a vacuum leakage? depends on where the gasket is broke. could leak oil, water but may not. fluid and oil could just be pulled in and burned like the air that is getting in. look at your oil...if it looks gray, you are getting water. if your using oil, it'll show on the plug for that cylinder. more likely, you'll see nothing.
juma
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