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Old 07-13-2020, 06:36 AM   #7
Ed in Maine
Senior Member
 
Join Date: May 2010
Location: Washington Cty., ME or Flagler Cty., FL
Posts: 1,106
Default Re: Model B Carb Issues

The GAV on the Model B Carb is used differently from the Model A. Per the Service Bulletins, Ford stated that the GAV is only used when the car is cold. Then the GAV should be closed. The Service Bulletiin stated that when customers complain about gas mileage they should be urged not to have the GAV open. Therefore, if the GAV is necessary after the car has warmed up, it may mean that the jets are not sized per the specifications and should be flow tested. Refer to Steve Pargater's manual on restoring A and B Carbs.
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