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Old Sep 25, 2016 | 12:37 AM
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Missed Connections

Can y'all help me figure out where these vacuum amd electrical connections go? It's a 1983 F100. Thank you.




Looks to be some kind of solenoid.



I believe thhe green vacuum line is connected to the EGR valve.



A wire that seems to be loose and comes from an engine accessory below the smog pump.
 
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Old Sep 29, 2016 | 09:49 AM
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That Carb Solenoid looks like either a Fast Idle Solenoid or Anti-Diesel Solenoid. I believe there should be power to it in Ignition Run position. Time to check Schematics and Carb Diagrams... which I don't have...
 
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Old Sep 29, 2016 | 09:58 AM
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Do yourself a favor and replace those hard plastic vacuum lines with rubber lines. With the age of these vehicles those plastic lines crack, split, break and are a common cause of vacuum leaks.
 
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Old Sep 29, 2016 | 01:29 PM
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We are probably going to be replacing them with rubber lines. There's not a lot of it and it's easy to replace. Thanks for the tip. Any ideas on what the last photo is?
 
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Old Sep 29, 2016 | 09:30 PM
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The Frenchtown Flyer
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Originally Posted by Atlas45
We are probably going to be replacing them with rubber lines. There's not a lot of it and it's easy to replace. Thanks for the tip. Any ideas on what the last photo is?

That looks like the connection to the electric choke cap. Put a voltmeter on it first with 'key on' and second while the engine is running.
 
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Old Oct 1, 2016 | 11:07 PM
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Originally Posted by The Frenchtown Flyer
That looks like the connection to the electric choke cap. Put a voltmeter on it first with 'key on' and second while the engine is running.
What should the reading with the "key on/accessory" be?
 
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Old Oct 4, 2016 | 09:52 AM
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From the factory, the choke feed wire was attached to the "S" stator of the alternator. There should be zero voltage when the engine is not running.
 
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Old Oct 4, 2016 | 01:35 PM
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Originally Posted by 1986F150six
From the factory, the choke feed wire was attached to the "S" stator of the alternator. There should be zero voltage when the engine is not running.
Thank you so much. The truck would not want to idle. In the past, my grandfather held the choke open with a steel clip and fed it gas until it warmed up.
 
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