carb help?
Cargo Master
Joined: Dec 2004
Posts: 3,362
Likes: 22
From: Florence, SC
WOW, there a LOT of wrong answers in here.
That big tube towards the back of the carb coming from the secondary fuel bowl is nothing more than a fuel bowl vent; DO NOT HOOK A FUEL LINE TO THIS VENT!! There should be a vacuum hose hooked to this port that leads to the charcoal canister located on the passenger's side down low/under the battery. In your first pic, you can see a big hose hooked to the primary fuel bowl that goes to the charcoal canister. The canister is there for the gas fumes from the fuel bowls to collect and be burned by the engine for later.
Your carburetor has "side-hung" float bowls, so the single fuel line going to the primary fuel bowl is correct. If you look on the driver's side of the carb, you will see a fuel transfer tube feeding the secondary fuel bowl.
Only if you have "center hung" fuel bowls is when you will have two seperate fuel lines to feed the fuel bowls.
And your PCV line is already hooked up. It runs from your PCV valve on the passenger's side valve cover to the front of the carb down low. You can see it in your first tow pics, located under your primary fuel bowl.
Aside from secondary fuel bowl vent, and the hot air choke tubes missing, I don't see any missing vacuum lines, Chief.
That looks like the stock Holley 4180 emissions carburetor. This carburetor does not use a secondary metering block; it uses a metering plate instead.
That big tube towards the back of the carb coming from the secondary fuel bowl is nothing more than a fuel bowl vent; DO NOT HOOK A FUEL LINE TO THIS VENT!! There should be a vacuum hose hooked to this port that leads to the charcoal canister located on the passenger's side down low/under the battery. In your first pic, you can see a big hose hooked to the primary fuel bowl that goes to the charcoal canister. The canister is there for the gas fumes from the fuel bowls to collect and be burned by the engine for later.
Your carburetor has "side-hung" float bowls, so the single fuel line going to the primary fuel bowl is correct. If you look on the driver's side of the carb, you will see a fuel transfer tube feeding the secondary fuel bowl.
Only if you have "center hung" fuel bowls is when you will have two seperate fuel lines to feed the fuel bowls.
And your PCV line is already hooked up. It runs from your PCV valve on the passenger's side valve cover to the front of the carb down low. You can see it in your first tow pics, located under your primary fuel bowl.
Aside from secondary fuel bowl vent, and the hot air choke tubes missing, I don't see any missing vacuum lines, Chief.
That looks like the stock Holley 4180 emissions carburetor. This carburetor does not use a secondary metering block; it uses a metering plate instead.
Cargo Master
Joined: Apr 2003
Posts: 2,057
Likes: 423
From: Too close to Houston
WOW, there are a LOT of wrong answers in here.
That big tube towards the back of the carb coming from the secondary fuel bowl is nothing more than a fuel bowl vent; DO NOT HOOK A FUEL LINE TO THIS VENT!! There should be a vacuum hose hooked to this port that leads to the charcoal canister located on the passenger's side down low/under the battery. In your first pic, you can see a big hose hooked to the primary fuel bowl that goes to the charcoal canister. The canister is there for the gas fumes from the fuel bowls to collect and be burned by the engine for later.
Your carburetor has "side-hung" float bowls, so the single fuel line going to the primary fuel bowl is correct. If you look on the driver's side of the carb, you will see a fuel transfer tube feeding the secondary fuel bowl.
Only if you have "center hung" fuel bowls is when you will have two seperate fuel lines to feed the fuel bowls.
And your PCV line is already hooked up. It runs from your PCV valve on the passenger's side valve cover to the front of the carb down low. You can see it in your 3rd pic.
Aside from secondary fuel bowl vent, and the hot air choke tubes missing, I don't see any missing vacuum lines, Chief.
That big tube towards the back of the carb coming from the secondary fuel bowl is nothing more than a fuel bowl vent; DO NOT HOOK A FUEL LINE TO THIS VENT!! There should be a vacuum hose hooked to this port that leads to the charcoal canister located on the passenger's side down low/under the battery. In your first pic, you can see a big hose hooked to the primary fuel bowl that goes to the charcoal canister. The canister is there for the gas fumes from the fuel bowls to collect and be burned by the engine for later.
Your carburetor has "side-hung" float bowls, so the single fuel line going to the primary fuel bowl is correct. If you look on the driver's side of the carb, you will see a fuel transfer tube feeding the secondary fuel bowl.
Only if you have "center hung" fuel bowls is when you will have two seperate fuel lines to feed the fuel bowls.
And your PCV line is already hooked up. It runs from your PCV valve on the passenger's side valve cover to the front of the carb down low. You can see it in your 3rd pic.
Aside from secondary fuel bowl vent, and the hot air choke tubes missing, I don't see any missing vacuum lines, Chief.
How is it acting flooded? Does it blow black smoke out the exhaust when you floor it?
Is the big hose stuck under the EGR valve loose? If it is, it's prolly the one that is supposed to go on the back bowl vent. And plug the port over the choke heater. It's allowing dirt to suck into your engine.
Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
Yup, But like I always stated, I ain't no carb. guru.
(And probably should of kept my mouth shut)
I know how they work, I understand the theory of operation, I've tuned many, But I don't have experience with A LOT of different carbs.
Thanks for setting me (us) straight!
[edit]
I would enjoy seeing a picture of the drivers side!
[/edit]
-Enjoy
fh : )_~
(And probably should of kept my mouth shut)
I know how they work, I understand the theory of operation, I've tuned many, But I don't have experience with A LOT of different carbs.
Thanks for setting me (us) straight!
[edit]
I would enjoy seeing a picture of the drivers side!
[/edit]
-Enjoy
fh : )_~
Thread Starter
|
Junior User
Joined: Dec 2008
Posts: 85
Likes: 0
From: Henderson,Nv
I found that the plug had came of this one i put a arrow to plug it and now it seems to be running fine.The breather hose in the front just goes know where will hook to canister.Does anybody know if the hose from distp is hook up right to the carp its the left of the one i drawed a arrow to.
Thread Starter
|
Junior User
Joined: Dec 2008
Posts: 85
Likes: 0
From: Henderson,Nv
WOW, there a LOT of wrong answers in here.
That big tube towards the back of the carb coming from the secondary fuel bowl is nothing more than a fuel bowl vent; DO NOT HOOK A FUEL LINE TO THIS VENT!! There should be a vacuum hose hooked to this port that leads to the charcoal canister located on the passenger's side down low/under the battery. In your first pic, you can see a big hose hooked to the primary fuel bowl that goes to the charcoal canister. The canister is there for the gas fumes from the fuel bowls to collect and be burned by the engine for later.
Your carburetor has "side-hung" float bowls, so the single fuel line going to the primary fuel bowl is correct. If you look on the driver's side of the carb, you will see a fuel transfer tube feeding the secondary fuel bowl.
Only if you have "center hung" fuel bowls is when you will have two seperate fuel lines to feed the fuel bowls.
And your PCV line is already hooked up. It runs from your PCV valve on the passenger's side valve cover to the front of the carb down low. You can see it in your first tow pics, located under your primary fuel bowl.
Aside from secondary fuel bowl vent, and the hot air choke tubes missing, I don't see any missing vacuum lines, Chief.
That looks like the stock Holley 4180 emissions carburetor. This carburetor does not use a secondary metering block; it uses a metering plate instead.
That big tube towards the back of the carb coming from the secondary fuel bowl is nothing more than a fuel bowl vent; DO NOT HOOK A FUEL LINE TO THIS VENT!! There should be a vacuum hose hooked to this port that leads to the charcoal canister located on the passenger's side down low/under the battery. In your first pic, you can see a big hose hooked to the primary fuel bowl that goes to the charcoal canister. The canister is there for the gas fumes from the fuel bowls to collect and be burned by the engine for later.
Your carburetor has "side-hung" float bowls, so the single fuel line going to the primary fuel bowl is correct. If you look on the driver's side of the carb, you will see a fuel transfer tube feeding the secondary fuel bowl.
Only if you have "center hung" fuel bowls is when you will have two seperate fuel lines to feed the fuel bowls.
And your PCV line is already hooked up. It runs from your PCV valve on the passenger's side valve cover to the front of the carb down low. You can see it in your first tow pics, located under your primary fuel bowl.
Aside from secondary fuel bowl vent, and the hot air choke tubes missing, I don't see any missing vacuum lines, Chief.
That looks like the stock Holley 4180 emissions carburetor. This carburetor does not use a secondary metering block; it uses a metering plate instead.
Cargo Master
Joined: Dec 2004
Posts: 3,362
Likes: 22
From: Florence, SC
No, that is the "fresh air" supply for the hot air choke. There supposed to be a rubber tube coming from it and then a metal tube attaches to that and then that attaches to the choke stove on the exhaust manifold for the hot air choke.
There is no vacuum in this line, so leaving this unhooked should not affect the operation of the carburetor.
There is no vacuum in this line, so leaving this unhooked should not affect the operation of the carburetor.
Thread Starter
|
Junior User
Joined: Dec 2008
Posts: 85
Likes: 0
From: Henderson,Nv
No, that is the "fresh air" supply for the hot air choke. There supposed to be a rubber tube coming from it and then a metal tube attaches to that and then that attaches to the choke stove on the exhaust manifold for the hot air choke.
There is no vacuum in this line, so leaving this unhooked should not affect the operation of the carburetor.
There is no vacuum in this line, so leaving this unhooked should not affect the operation of the carburetor.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
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
Ford Super Duty: 5 Things Owners LOVE, 5 Things They LOATHE!
Joe Kucinski
Every 2026 Ford Truck Engine RANKED from WORST to FIRST!
Michael S. Palmer
The Best F-150 Deal of Every Trim Level (XL through Raptor)
Joe Kucinski
Fleet Mechanic
Joined: Apr 2007
Posts: 1,429
Likes: 4
From: patricia ab canada
also it also looks like the hot air has been unhooked from the choke.make sure the passage leading to choke assembly is plugged or you will have a vacuum leak.
Thread
Thread Starter
Forum
Replies
Last Post
Jkenosh
1973 - 1979 F-100 & Larger F-Series Trucks
1
Aug 25, 2015 09:57 PM
351Cleveland C4
1967 - 1972 F-100 & Larger F-Series Trucks
49
Aug 24, 2013 02:30 PM
mh34444
1973 - 1979 F-100 & Larger F-Series Trucks
5
Sep 27, 2009 03:24 PM
Brian77Ford
335 Series- 5.8/351M, 6.6/400, 351 Cleveland
12
Apr 23, 2004 01:08 AM
