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| | | | Joined: Sep 2009 Posts: 35 New Guy | | New Guy Joined: Sep 2009 Posts: 35 | Can you block off the vacume outlets on a pump with the built in vacume pump ? I blocked off the ones on my 53 235 and now the pump will not work ? | | | | | Joined: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | And if you open them up again does it work? If so then you have your asnwer...
I expect you can't block them.
If you don't need the vacuum part why not swap for a normal fuel pump?
Grigg | | | | | Joined: Sep 2009 Posts: 35 New Guy | | New Guy Joined: Sep 2009 Posts: 35 | Have a 6v electric pump for wipers, pump is original with glass bowl filter attatched, like to keep as much as GM installed at factory.....thanks...gmguy | | | | | Joined: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | I thought that the dual action pump was an option, and if you won't be using it then what's the point?
Personally I'd simplify to a plain fuel pump with the glass bowl on top, or keep the dual action pump and use it for vacuum as designed.
Grigg | | | | | Joined: Feb 2004 Posts: 29,747 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,747 | A vacuum boost pump is designed to assist the manifold vacuum, not be used instead of it. I've seen people install a jumper line between the ports instead of blocking them off, and run like normal if they want to disable the vacuum boost. I suspect the problem with blocking the flow is that a vacuum is being formed which keeps the fuel section of the pump from working right. Either leave the ports unblocked, or install short sections of vacuum line and hide the open ends around behind the engine or something.
Jerry
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| | | | | Joined: Sep 2009 Posts: 35 New Guy | | New Guy Joined: Sep 2009 Posts: 35 | Thanks for the info on the pump ! | | |
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