Q-jet question

[77crewcab]

On my carb I have lots of vacuum ports that I am not using and the rubber caps keep falling apart causing vacuum leaks. I started thinking about filling the ports with the same epoxy I used to fill the fuel bowl plugs. Just wondered if anyone has done this in the past or if it would hurt anything. The ports arent being used anyway and would just have a cap on them so I don't see as it could hurt anything.

 

[pauly383]

They are pressed in , why not pull the ports , tap the holes , and thread a small fine thread machine screw into them .

Or remove them and fill them with hi temp RTV , then press them back in .

 

[77crewcab]

I hadn't thought of anything like that. I just realized I am missing the big port tube on the front of the middle piece/fuel bowl. Anyway It shouldn't hurt to permanently block them in some way should it.

 

[pauly383]

The big one up front top is the bowl vent , down low is for PCV valve .

I like running the bowl vent , its probably not much , but any gas that can go back to the tank or in the carb helps out cashwise

 

[77crewcab]

So is it for fuel return, vacuum or what? Could I just leave it or does it need to be hooked up to something. Right now there is nothing there, no port tube just an empty hole?

 

[R72K5]

leave the fuel bowl vent open it does not need to be connected at all, i always run them open with nothing hooked on, originally it ran to the charcoal canister, to the port on the can saying CARB



i always use a short piece of hose and a scew or even a twig bustged off in the smaller ports, always works fine for me,

 

[pauly383]

i always use a short piece of hose and a scew or even a twig bustged off in the smaller ports, always works fine for me,

The fine details

 

[77crewcab]

Thanks!