Cliff's Quadrajet Parts and Rebuild Kits

Quadrajet Problem Solving => Diagnose a Quadrajet carburetor problem => Topic started by: kenn on August 10, 2013, 05:42:54 AM

Title: Float Boal vac ?
Post by: kenn on August 10, 2013, 05:42:54 AM

Hello I'm having vacuum problems. While checking it out I found that I have manifold vacuum routed to the float area and this does not seem to be correct to me. The gasket only partially covers a void that allows the vacuum to travel there.
  Thanks for imput K.E.N.

Title: Re: Float Boal vac ?
Post by: Cliff Ruggles on August 11, 2013, 06:34:36 AM

Not exactly sure what you are asking?  Got any pics?....Cliff

Title: Re: Float Boal vac ?
Post by: kenn on August 11, 2013, 01:22:22 PM

Sorry no pictures.  After running my rebuilt carb I had trouble at idle.
 I needed to have the idle screw turned in to far.
 I thought it needed more air to keep from opening the throtle plates. So I added bypass air to the baseplate.
 When I was checking those passages I found a different spot that the gasket did not cover an area that allowes manifold vacuum to pass up into the float boal.
 I dont know enough to know if that is the correct way the boal vents, I thought the boal is vented up thru the top not down into the manifold.
I dont think it should have vacume in the boal area that would seem to be just like an open port.
The gasket I am using is the one that was with the kit I bought here.
If you do need pictures I can have my daughter help.

Thanks K.E.N.

Title: Re: Float Boal vac ?
Post by: kenn on August 13, 2013, 07:59:01 AM

checking this out further I found that the passage is blocked. I must be hearing the vacuum thru the APT adjustment screw hole.