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Diagnosing a Vacuum Check Valve 200

posted by  bustednutz on  Fri Nov 3 13:24 CST 2006
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last visit: Sat Feb 17 06:46 CST 2007
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I took the vacuum check valve off tonight. ( the one above the intake manifold ) It supplies vacuum to the heater controls. How does one diagnose if it is good or bad. I can blow straight through both ends with no resistance at all. I think this may be the culprit causing hissing under my dash upon acceleration.






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New Diagnosing a Vacuum Check Valve [200]
posted by  bustednutz  on Fri Nov 3 13:24 CST 2006 >


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