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Old 09-29-2011, 09:21 PM   #203
jsnzx3
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Join Date: Sep 2011
Fan#: 89774
Location: Fayetteville, AR
What I Drive: 2000 Silver ZX3

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I'm seeing a 2 - 3 mpg improvement since replacing the pcv hose and a worn-through vacuum line from the evaporative system purge valve. The car is running great but I may have a vacuum leak right at the intake manifold. Using a tube as a stethoscope, I can hear a hiss where the pcv hose goes in. The pcv hose is new and clamped down so I wonder if I'm just hearing air flowing through it?
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