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Old 06-23-2011, 08:22 AM
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W 108 vacume advance / retard vacume hose disaster

I am having multiple problems getting my 1971 280 S six cylinder to idle. I know I need an idle fuel shut-off solenoid. I am sure that will fix that then I will move on to getting it timed. I am having multiple problems getting my 1971 280 S six cylinder to idle. I know I need an idle fuel shut-off solenoid and if anyone has one laying around for sale please let me know. The Zenith carbs have just been rebuilt at Carburetor USA and are beautiful. I realized when I reinstalled them that the vacuum hose diagram I had drawn months ago is missing. The Hayes manual shows nothing on the routing of the vacuum hoses. Can anybody tell me where these switches hook up to? I have numbered them in hopes to make it easy for a reply. Thank you
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Old 06-23-2011, 05:38 PM
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Moving to a new thread, since this is not a 4.5 issue.
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Old 06-23-2011, 08:44 PM
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this might help
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Old 06-24-2011, 07:19 PM
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Thank you for responding; yes I recognize that diagram from the Hayes manual. That diagram shows the electrical wiring. I am still looking for the routing of the vacuum hoses from the switches shown. I have numbered the hose connections 1-4 in hopes that someone can tell me where each hose connects to. Thanks again
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Old 06-24-2011, 09:51 PM
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I can't say for everything but as a rule vacuum is generally hooked up to the central pipe on the bottom of a switch over valve. So if you have three ports it will be the middle one. If you have two ports it will be the one in the center of the valve.
Sometimes ports on the top of the valve are left open and are not hooked up to anything.
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