Where do these hoses go?
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From: Laurel, MT
Where do these hoses go?
I have a 75 F250 with a 72 390 swap. I have a couple of lines that don't make sense and looking in the 72 galleries I found some clues but still need some help. Can you take a look at this gallery pic:
https://www.ford-trucks.com/user_gal...=36239&width=0
here is another example...
https://www.ford-trucks.com/user_gal...d=3367&width=0
and please tell me where the red hose coming out of the air cleaner assembly is going?
Also, I have the small tube that comes out of the back of the choke and goes into something...I don't see a hole in the intake like others, and on some gallery pics I see it going down into what looks like the passengers header??
https://www.ford-trucks.com/user_gal...=36239&width=0
here is another example...
https://www.ford-trucks.com/user_gal...d=3367&width=0
and please tell me where the red hose coming out of the air cleaner assembly is going?
Also, I have the small tube that comes out of the back of the choke and goes into something...I don't see a hole in the intake like others, and on some gallery pics I see it going down into what looks like the passengers header??
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From: Laurel, MT
I must be missing something here Dennis, because I have seen this illustration and it looks nothing like my setup. I have some pics in my gallery if you would like to peek at it. I think I know where the carb connection goes (into the header near the firewall), but I am still puzzled as to where the hose from the air cleaner goes (it's currently plugged off). Like I stated above I seem to have the motor from a 72...probably an auto not manual. So, still slightly puzzled. Thanks for the pointer tho...
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From: Laurel, MT
Originally Posted by Mil1ion
To the evaporative cannister under the battery for unburnt fuel vapours.
That's why it is directed from that thru a filter into the intake
That's why it is directed from that thru a filter into the intake
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From: Laurel, MT
Oh, would this evap hose not being hooked up cause a loss in fuel pressure?...I should explain: If I let my truck sit for a few days without starting it, it takes about 30 sec. or so for it to turn over. I assume it has no fuel in the line because when I move the throttle linkage while under the hood I don't hear any gas spraying in the carb. After it turns over and runs I do hear gas spraying in the carb. Almost like the FP needs to push some fuel to the carb. Hope that makes sense...I sound like such a n00b on this forum!
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From: Laurel, MT
This is my setup:
In cab tank with a drivers side small second tank. Thanks Dennis - you are a big help!
In cab tank with a drivers side small second tank. Thanks Dennis - you are a big help!
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As stated above No.
The Evaporative system is for unspent fuel.
There were 2 system thru the years.
I think it was called a FEEDBACK carburetor that took unused gasoline and sent that back to the fuel tank in conjunction with the Evaporative system that sent the vapours back to the Air Intake via the air pump circuitry.
I'll see if I can find the whole set-up and post it
The Evaporative system is for unspent fuel.
There were 2 system thru the years.
I think it was called a FEEDBACK carburetor that took unused gasoline and sent that back to the fuel tank in conjunction with the Evaporative system that sent the vapours back to the Air Intake via the air pump circuitry.
I'll see if I can find the whole set-up and post it
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From: Laurel, MT
So, last night I followed the fuel line on the passengers side frame rail, and it looks like it ducks into the frame, crosses the cross memeber and goes back to the fuel filter. I have no evap canister.
I found a small hole in the rear of the passengers header where the choke temp tube goes to and hooked that back up. Then I installed my manual choke and adjuster...and it seems to run really well! I was able to go full open choke and adjust the slow idle. Now I need a tach to really dial it in.
I do see one other problem: On the front of the carb there is a plate where the throttle linkage pushes fuel through the carb...here is an (old) pic:
The part I am talking about is the link coming from the right side and attaches to the flat metal connector which then goes into the carb and is held on by a square plate with 4 screws. You can see all the fuel that has leaked out into the intake just below it. There must be a gasket or something I can replace, right? I really don't need to rebulid to carb, so hopefully that is not the solution.
I found a small hole in the rear of the passengers header where the choke temp tube goes to and hooked that back up. Then I installed my manual choke and adjuster...and it seems to run really well! I was able to go full open choke and adjust the slow idle. Now I need a tach to really dial it in.
I do see one other problem: On the front of the carb there is a plate where the throttle linkage pushes fuel through the carb...here is an (old) pic:
The part I am talking about is the link coming from the right side and attaches to the flat metal connector which then goes into the carb and is held on by a square plate with 4 screws. You can see all the fuel that has leaked out into the intake just below it. There must be a gasket or something I can replace, right? I really don't need to rebulid to carb, so hopefully that is not the solution.
Last edited by MikeWire; Sep 7, 2007 at 11:12 AM.
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That's the accelerator pump.
You can buy that part and a new gasket separate.
Also, It looks like the rod hooked to it isn't indexed correctly either.
Normally it goes in the 2nd hole/slot.
I'll check my book for specs for that Ford 2150 carb
You can buy that part and a new gasket separate.
Also, It looks like the rod hooked to it isn't indexed correctly either.
Normally it goes in the 2nd hole/slot.
I'll check my book for specs for that Ford 2150 carb
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One thing you'll want to check is has the accelerator pump body warped. The one on my Holley had and I was on the third gasket before I realized it. If it is warped, you can fix it by using sandpaper on a flat surface -- plate glass, marble tile etc. Get every grit of paper your hardware store carries and start coarse and work your way up. The easiest way to do it is to sand on a diagonal then change directions with each grit. When the scratches from the previous grit disappear, move up a grit.
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From: Laurel, MT
Originally Posted by 76supercab2
One thing you'll want to check is has the accelerator pump body warped. The one on my Holley had and I was on the third gasket before I realized it. If it is warped, you can fix it by using sandpaper on a flat surface -- plate glass, marble tile etc. Get every grit of paper your hardware store carries and start coarse and work your way up. The easiest way to do it is to sand on a diagonal then change directions with each grit. When the scratches from the previous grit disappear, move up a grit.
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From: Addison,Texas
here is an (old) pic:
On the front of your carb, just above the accelerator pump, there's a hole that's connected to an angled hump on top of the carb, just in front of where the air intake gasket sits. If you have a carbon cannister, a connector pops out there to connect a line for the carbon can. I can't tell if yours is plugged or just damaged, but you want that to be closed off if it isn't connected for evaporation, otherwise all your gas evaporates out of the carb.
I think that might be about the dirtiest carb I've ever seen. Well, maybe not. Anyways, the typical fuel filter plugs into the carb right where the fuel line is going now, so I hope you have an alternate filter arrangement.
Also, just under the accelerator pump, actually under the carb body, there's a vacuum line connector that's hard to see; you might want to check and make sure it's capped.
All that said, you really oughta just rebuild that thing. Or swap it.
On the front of your carb, just above the accelerator pump, there's a hole that's connected to an angled hump on top of the carb, just in front of where the air intake gasket sits. If you have a carbon cannister, a connector pops out there to connect a line for the carbon can. I can't tell if yours is plugged or just damaged, but you want that to be closed off if it isn't connected for evaporation, otherwise all your gas evaporates out of the carb.
I think that might be about the dirtiest carb I've ever seen. Well, maybe not. Anyways, the typical fuel filter plugs into the carb right where the fuel line is going now, so I hope you have an alternate filter arrangement.
Also, just under the accelerator pump, actually under the carb body, there's a vacuum line connector that's hard to see; you might want to check and make sure it's capped.
All that said, you really oughta just rebuild that thing. Or swap it.