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Subject Vacuum, pcv's, and boost leak questions.
     
Posted by Wright (Ca) on April 22, 2010 at 5:54 PM
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Message My z occasionally idles a bit rough. Feels like a slight missfire. I've performed a boost leak test but I can't ever hear or find any leaks. After pressurizing the intake system to 5psi it bleeds back to zero in about 30-45 seconds. Is this normal or should it hold 5psi?

With a vacuum gauge hooked up to the balance tube I get a very steady 19-20 inches at idle. I believe this is a good sign but was curious if this confirms that there are no leaks?

Lastly, I have been trying to confirm that my pcv valves are operating correctly. Pinching both pcv hoses shut does not seem to effect idle rpm like the fsm suggest however when pinching the passenger side pcv hose shut I hear a load click near the iacv. Is this normal and why does the driver side not have the same effect? The pcv valves are OEM and have less then 3000 miles on them.

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  • Vacuum, pcv's, and boost leak questions. - Wright (Ca) 17:54:02 04/22/10
 
     
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