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Old 03-19-2021, 11:18 AM   #9
Will N
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Join Date: Jul 2010
Location: Pennsylvania
Posts: 1,100
Default Re: Engine runs smoother with open vacuum line.

Quote:
Originally Posted by alexiskai View Post
If that works, it means he's not on the idle jet at idle. If you are on the idle jet then the GAV won't do anything, you'd need to adjust the idle screw. See the diagram here under Idle.

Hmm. The GAV impacts the flow of gas into the well from which both the cap jet and the idle jet draw their fuel. I see a difference in the idle when I play around with the GAV. Open too much and the idle will surge a little and I smell unburned gas in the exhaust.
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