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1967 - 1972 F-100 & Larger F-Series Trucks Discuss the Bumpsides Ford Truck

throttle solenoid

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Old Apr 21, 2014 | 12:49 PM
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throttle solenoid

So ive been trying to fix some the issues with my wiring in the engine compartment. When I bought the truck there were wires coiled up attached to nothing. the last one I'm having an issue with is the blue wire, which from diagrams seems to attach to the throttle solenoid. I recently bought a Holley 4160 and dont have the previous carb any longer. My questions are: What does it do? Where would it be located? Do I need it?
 
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Old Apr 21, 2014 | 01:49 PM
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Originally Posted by Jnissen04
So ive been trying to fix some the issues with my wiring in the engine compartment. When I bought the truck there were wires coiled up attached to nothing. the last one I'm having an issue with is the blue wire, which from diagrams seems to attach to the throttle solenoid. I recently bought a Holley 4160 and dont have the previous carb any longer. My questions are: What does it do? Where would it be located? Do I need it?
The "other" site shows a diagrahm of a 1972. Not 1971. Judging from it as long as your engine shuts off without dieseling you don't need it.
 
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Old Apr 21, 2014 | 02:35 PM
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The "other" site shows a diagrahm of a 1972. Not 1971. Judging from it as long as your engine shuts off without dieseling you don't need it.
I noticed that, are '71/'72 wiring the same? Ive never heard of a throttle solenoid before, just want to make sure when I go to start the motor Im not going to jack something or have it not run properly
 
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Old Apr 21, 2014 | 05:02 PM
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Should be. Since power comes directly from the ignition switch that tells me the solenoid is energized when switch is "on". AKA engine running. The solenoid energized would keep the throttle linkage at the correctly adjusted idle. When the switch is turned off the solenoid would de-energize and lower the throttle linkage to a real low idle to help shut off.
 
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Old Apr 22, 2014 | 02:59 PM
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Got a hold of my father in law, he actually knew what it was. the way he explained it was that if i had A/C, which I don't, and i came to a stop, the solenoid would engage and kick up the RPM's to keep the A/C pumping. So im just going to coil it back up and leave it be.
 
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Old Apr 22, 2014 | 05:46 PM
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Originally Posted by Jnissen04
Got a hold of my father in law, he actually knew what it was. the way he explained it was that if i had A/C, which I don't, and i came to a stop, the solenoid would engage and kick up the RPM's to keep the A/C pumping. So im just going to coil it back up and leave it be.
True. A lot of vehicles have that. That's why I looked at a wiring schematic. The schematic shows power going straight to the solenoid. Not to the a/c system first. I still think I am correct but the end result is the same. I refer back to my original post.
 
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Old Apr 22, 2014 | 07:32 PM
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Originally Posted by Jnissen04
Got a hold of my father in law, he actually knew what it was. the way he explained it was that if i had A/C, which I don't, and i came to a stop, the solenoid would engage and kick up the RPM's to keep the A/C pumping. So im just going to coil it back up and leave it be.
I've got the 1970 schematic here, and it notes that the Carb. Throttle Solenoid is for F-100 6-cyl, the 302 8-cyl and the 360 with A/C.

Apparently, it is used for the same purpose in different applications.

Which engine are you using?
 
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Old Apr 22, 2014 | 10:37 PM
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My 72 F-100, 302, T-18, and no A/C had a throttle solenoid. It was an anti-dieseling device and also used for A/C. An explanatory article here:

http://mustangtimes.net/31-12/pg54.pdf

Pony Carburetors uses them for restoration purposes, but not as a performance device. I believe it was an early emissions device.
 
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Old Apr 23, 2014 | 02:31 AM
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Originally Posted by Thipdar
I've got the 1970 schematic here, and it notes that the Carb. Throttle Solenoid is for F-100 6-cyl, the 302 8-cyl C4 & A/C and the 360 with A/C, E100/300 C4/A/C.
1970/71: D0AZ-9D856-A .. Throttle Emission Control Solenoid Assy.

1972: D2AZ-9D856-E
 
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Old Apr 23, 2014 | 05:52 AM
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Everybody is right, they are used for both purposes, however your's was used as an anti diesel solinoid acording to the wiring diagram as Jeff said... So as long as your engine shuts off when you turn off the key, you don't need it.
 
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Old Apr 23, 2014 | 03:48 PM
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Everybody is right, they are used for both purposes, however your's was used as an anti diesel solinoid acording to the wiring diagram as Jeff said... So as long as your engine shuts off when you turn off the key, you don't need it.
Before I parked it 2 years ago, it never had an issue with turning off. Maybe after I get it up and running again I'll look into get it. thanks for the help guys!
 
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Old Apr 24, 2014 | 06:06 AM
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Hi, ND:

Actually, the 1970 "Master Wiring Diagram" schematic I was referring to doesn't show the additional information you've indicated. Where are you getting that information from?

Also, including the additional information only validates the point I was trying to make, so making the correction is moot.
 
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Old Apr 24, 2014 | 01:05 PM
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Originally Posted by Thipdar

Actually, the 1970 "Master Wiring Diagram" schematic I was referring to doesn't show the additional information you've indicated. Where are you getting that information from?
1970 D0AZ-9D856-A = 1964/72 Ford Truck Parts Catalog - Carburetor parts lists 29G - 29J - 29K
 
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Old Apr 25, 2014 | 12:16 AM
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Hi, ND:

While your information may be accurate, adding those terms to my statement made my statement false.

Next time you make a correction, consider making an additional statement with an additional citation.
 
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