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Old 05-19-2007, 12:46 PM
bgfzy bgfzy is offline
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Question vacuum help

1979 F-250 4x4 400ci standard tranny. i had a shop work on my truck, they left numerous vacuum lines disconnected includeing vacuum advance my truck runs awfull. I cannot find the orignal location for this connection I tried to hook it up to manifold vacuum no it seems to be advanced all the time. I went to autozone.com got a diagram for vacuum hoses and it looks like i am missing a vacuum restrictor. if anyone has any ideas please help
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Old 05-19-2007, 12:55 PM
Mil1ion Mil1ion is offline
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First.... Welcome to the site !


The Vacuum advance hose is supposed to run to the Thermal switch on the T-stat before the switched hose runs to the PORTED vacuum port on the front of the carb..or front side of the carb.

There are several hose routings for these trucks and maybe you have the wrong one.
Is there a white sticker on the passenger side valve cover?

Click the image to open in full size.



post that info if you have it

There are about 16 different routings for a 79 400.

This should be close to the hose routing you require

7-73-R10

Click the image to open in full size.

Last edited by Mil1ion; 05-19-2007 at 01:35 PM.
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Old 05-19-2007, 01:34 PM
bgfzy bgfzy is offline
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thanks i'll give it a try !
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Old 04-14-2014, 11:30 PM
dragonrider dragonrider is offline
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is there any way i can get a copy of this vacuum diagram i am getting ready to replace the motor in my 78 f250 and need this diagram 7-73-R10 this is the only place i have seen it
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Old 04-14-2014, 11:47 PM
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is there any way i can get a copy of this vacuum diagram i am getting ready to replace the motor in my 78 f250 and need this diagram 7-73-R10 this is the only place i have seen it
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Old 04-15-2014, 01:46 AM
dragonrider dragonrider is offline
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my email is cmspray@yahoo.com
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Old 04-15-2014, 11:33 PM
dragonrider dragonrider is offline
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thanks this will help a great deal
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