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Carb Vacuum Line Issue Carb Vacuum Line Issue
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Old 11-07-2009, 08:57 PM
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Join Date: Jan 2005
Location: King of Prussia, PA
Vehicle: 1984 Ford F150
Posts: 26
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Carb Vacuum Line Issue
I have a 1984 f-150 with a 302 and a motorcraft 2 barrel carb. The previous owner hacked up the emissions system and I am trying to put it back together. There are two lines I cant seem to identify. There is a hole on the underside of the choke. It draws a heavy vacuum and it is currently open. Does anyone know where it is supposed to connect to? Also, there are two small metal lines. One was for my EGR and I reconnected it. The other starts as a rubber hose on the back of the carb then transitions into a small metal hose. Any idea where that goes? I am hoping that wherever that hose goes it the source of my slight exhaust leak. Thanks!

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Old 11-07-2009, 10:23 PM
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Join Date: Jun 2007
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Vehicle: 1999 Ford F-150 5.4
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Might be that line under the choke is supposed to be part of the choke.
the Holly I have works like that. could the other one be power brakes or PVC?
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Old 11-11-2009, 10:49 AM
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Join Date: Nov 2006
Location: Memphis, TN, USA
Vehicle: 1983 Ford Bronco
Posts: 3,590
Pics would help. The threaded port on the bottom of the choke should have a metal line going thru the exhaust manifold to open air.
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