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Old 07-31-2019, 07:50 AM
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Formulas Formulas is offline
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Skip in vacuum reading can also be the PCV valve plumbed into a single runner

7 cylinders will be slightly higher and smooth then the one cylinder will hit, it has to draw a vacuum in the PCV line then the PCV slams shut which you can also HEAR and also see on a vacuum gauge

Google how a PCV valve works to see internals

As RPM increases the frequency increases and your ability to detect it diminishes

.

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Last edited by Formulas; 07-31-2019 at 08:02 AM.
  #2  
Old 07-31-2019, 08:57 AM
Pronto Poncho Pronto Poncho is offline
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Quote:
Originally Posted by Formulas View Post
Skip in vacuum reading can also be the PCV valve plumbed into a single runner

7 cylinders will be slightly higher and smooth then the one cylinder will hit, it has to draw a vacuum in the PCV line then the PCV slams shut which you can also HEAR and also see on a vacuum gauge

Google how a PCV valve works to see internals

As RPM increases the frequency increases and your ability to detect it diminishes

.
Very Good Stuff, Thanks

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  #3  
Old 08-08-2019, 08:04 AM
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Va68goat Va68goat is offline
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wbnapier,
No updates...been out of town for a week for work. Jeff and Paul reached out to a guy that lives near me thats going to check out the motor. I spoke to him a few times. Hoping he can come take a look this weekend.

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