carb auto choke help
Thread Starter
|
Senior User
Joined: Aug 2009
Posts: 124
Likes: 1
From: nova scotia
carb auto choke help
my truck i think has a 4180 holley carb. the PO changed it to manual choke and i would like to put it back to auto. what parts would be needed to do that. i believe the truck came from california but am not sure if that changes anything. thanks
Thread Starter
|
Senior User
Joined: Aug 2009
Posts: 124
Likes: 1
From: nova scotia
here are some pics. if you need more let me know of what.
not sure if this one is important or not
i believe this tag came off the carb. you can see where it broke off from around the choke.
not sure if this one is important or not
i believe this tag came off the carb. you can see where it broke off from around the choke.
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 38
From: EXTREME southwest CT
Holley sells all the parts to repair it to like it was.
You will need the numbers visible on the front of the choke horn on the drivers side.
Holley Performance Choke Service Parts Products
The Ford choke element is a special beast and only takes 6-9V instead of the regular 12V so you need to find a genuine Ford element (+/- $100 at the dealer, ouch!) or find a source of 12V only in run and add a ground to the conventional Holley electric choke element.
Hope this is helpful.
You will need the numbers visible on the front of the choke horn on the drivers side.
Holley Performance Choke Service Parts Products
The Ford choke element is a special beast and only takes 6-9V instead of the regular 12V so you need to find a genuine Ford element (+/- $100 at the dealer, ouch!) or find a source of 12V only in run and add a ground to the conventional Holley electric choke element.
Hope this is helpful.
Cargo Master
Joined: Mar 2008
Posts: 2,564
Likes: 207
From: Washington
Post a photo of your ALT, if it is a G2 ALT you will use the stator wire to power the choke. The plug with the 2 large wires will also have a smaller wire that is the stator output wire to feed the choke. It will have power output only when the engine is running.
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 38
From: EXTREME southwest CT
I think I am correct in saying that if he purchases a regular Holley 45-258 choke element he will need to find a source of 12V to power it.
And since these have two tabs, he will need to attach a ground as well.
Ford elements in a 4180 use the exciter current from the alternator. (+/- 7.5V) and no external ground. (you can see the choke wire wrapped around a plug wire in his second photo)
This way if the vehicle is left to warn up and it stalls, the choke doesn't burn up because of the lack of air moving over it through the internal vacuum port.
And the choke stops opening up once the alternator stops turning.
Sorry if I was not clear on this,
A 1985 should have a 2G alternator, but who knows what's gone on in the past 25 years.
And since these have two tabs, he will need to attach a ground as well.
Ford elements in a 4180 use the exciter current from the alternator. (+/- 7.5V) and no external ground. (you can see the choke wire wrapped around a plug wire in his second photo)
This way if the vehicle is left to warn up and it stalls, the choke doesn't burn up because of the lack of air moving over it through the internal vacuum port.
And the choke stops opening up once the alternator stops turning.
Sorry if I was not clear on this,
A 1985 should have a 2G alternator, but who knows what's gone on in the past 25 years.
Trending Topics
Post Fiend
Joined: Nov 2005
Posts: 7,437
Likes: 4
From: Charles Town, W bygod Va
AutoZone.com | Vehicle Selection | Year
Link to choke thermostat (I looked it up for my truck, check to make sure your 85 is the same)
Link to choke thermostat (I looked it up for my truck, check to make sure your 85 is the same)
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 38
From: EXTREME southwest CT
AutoZone.com | Vehicle Selection | Year
Link to choke thermostat (I looked it up for my truck, check to make sure your 85 is the same)
Link to choke thermostat (I looked it up for my truck, check to make sure your 85 is the same)
Can you post the part number or take a screenshot and post that?
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 38
From: EXTREME southwest CT
That works Bashby. Thanks! 
Edit: Just saw Bumblebee's post. He would have needed that list# to get the correct part from Holley.
It looks like a real cobbled together choke conversion.
Replace the element inserting it so the pin on the actuating arm fits into the loop on the end of the coiled spring, attach with the metal collar loosely.
Reset the choke by turning the cap to where it almost closes the butterfly at the top of the choke horn, with the engine cold, and then tighten the three screws to fix it in place.
Edit: Just saw Bumblebee's post. He would have needed that list# to get the correct part from Holley.
It looks like a real cobbled together choke conversion.
Replace the element inserting it so the pin on the actuating arm fits into the loop on the end of the coiled spring, attach with the metal collar loosely.
Reset the choke by turning the cap to where it almost closes the butterfly at the top of the choke horn, with the engine cold, and then tighten the three screws to fix it in place.
Thread
Thread Starter
Forum
Replies
Last Post
Duksrule
Big Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460)
3
Jun 16, 2009 11:36 AM
MessengerII
1967 - 1972 F-100 & Larger F-Series Trucks
2
Oct 17, 2008 09:16 PM
pffan021
1961 - 1966 F-100 & Larger F-Series Trucks
7
Oct 12, 2008 03:57 PM
pbuffing
1973 - 1979 F-100 & Larger F-Series Trucks
8
Oct 3, 2005 02:13 AM
